Transcript
Sportwerks Mayhem RTR Assembly and Operation Manual Specifications:
Length: Width: Track: Wheelbase: Weight: Gear ratio:
19.4 in (492mm) 12.2 in (310mm) Front - Adjustable 10.6–12.2 in (270–310mm) Rear - 12.2 in (310mm) Adjustable 12.8–13.0 in (325–330mm) 7.6 lb (3450 g) 10.86:1
Introduction Thanks for your purchase. If you’re new to off-road gas, hang on! You’re about to discover just how much fun trying to tame an overpowered 1/8-scale monster can be. If you’re already into racing, the Mayhem™ RTR will have you on the track in minutes with a competitive buggy of the highest caliber. The Mayhem RTR is based on the racewinning Mayhem Pro. It is professionally built and assembled by racers. The shocks and differentials come pre-filled with the correct lubes for optimum handling and performance. The Mayhem RTR comes assembled with radio, engine and exhaust installed. All that’s needed to make it race-ready is to install a 6-cell car pack in the starter and12 “AA” batteries in the transmitter and receiver. The front section of this manual features a 6-step quick start guide that will take you from box to race-ready in about 15 minutes. Also included are exploded view isometric drawings with part numbers and parts listings, helpful when disassembling your Mayhem for repair or maintenance. Setup sheets are provided in the back—one with a recommended baseline setup and a blank version that allows you to record your own settings. The last page includes helpful information and specifications for your Mayhem. Good luck, have fun and see ya at the track! SportWerks Product Development Team
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Table of Contents
Introduction..............................................................................2 Table of Contents ....................................................................3 Required Equipment................................................................4 Recommended Tools...............................................................5 Quick Start...............................................................................6 Engine Starting and Break-in ..................................................8 The Sportwerks Carburetor.....................................................9 Starting the Engine..................................................................10 Adjusting the Carburetor .........................................................11 After Run Engine Maintainance ..............................................12 Brake Linkage Setup ...............................................................13
Center Differential....................................................................14 Front/Rear Differential .............................................................15 Front and Rear Shocks ...........................................................16 Steering Bellcrank ...................................................................17 Front Suspension ....................................................................18 Front Gearbox Mount ..............................................................19 Center Driveshaft - Front.........................................................20 Rear Suspension.....................................................................21 Rear Gearbox Mount...............................................................22 Center Driveshaft - Rear .........................................................23 Chassis....................................................................................24 Radio Tray Assembly ...............................................................25 Engine/Clutch/Air Filter............................................................26 Fuel Tank .................................................................................27 Wheel and Tire Assembly .......................................................28 Setup Sheet.............................................................................36 Setup Sheet - Stock Settings ..................................................37 Specifications and Other Information ......................................38 Tuning Tips ..............................................................................39 Page 3
Required Equipment
Additional equipment required for assembly (not included) • 6-cell 7.2 volt car pack (DYN1000 recommended) • 12 “AA” Alkaline batteries
Additional item needed to operate • • • •
Glow igniter Air filter oil Car fuel Fuel bottle Note: Dynamite® offers a starter pack that includes the above items plus it includes extra glow plugs, a plug wrench and fuel line. (DYNSTART2).
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Recommended Tools While the Mayhem™ comes assembled and no tools are required, you’ll find the following tools helpful when maintaining your Mayhem:
Recommended Tools • • • • • • • •
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1.5mm hex wrench 2mm hex wrench 2.5mm hex wrench 3mm hex wrench 17mm open end wrench or adjustable wrench Small flat screwdriver #1 Phillips screwdriver Needle-nose pliers
Quick Start
Step #1
Step #2
Step #3
Install 8 “AA” batteries in the transmitter noting the proper direction of each cell.
Open the radio box and Install 4 “AA” batteries in the battery holder noting the proper direction of each cell.
Insert the antenna tube in the top of the radio box. Feed the receiver antenna through the tube until several inches extend out the top. Install the antenna tip.
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Step #4
Step #5
Step #6
Install a charged 6-cell 7.2-volt battery in the starter and attach the plug.
Turn on the transmitter and then the receiver. Check to make sure that the servos are operating correctly and that the carburetor closes when the throttle trigger is released.
Apply air filter oil (not included) and spread the oil uniformly onto the air filter allowing it to saturate the foam element.
Congratulations! Your Mayhem™ is ready to rip!
Quick Start Guide
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Engine Starting and Break-in Your First Runs If this is your first gas car, we highly recommend that you have an experienced gas car driver help during the first startups and runs. He will be able help you properly adjust your engine for break-in and then tune your engine for reliable performance. Before attempting to start your new buggy, be sure to read this section and fully understand each step before starting your engine. Pay particular attention to the needle settings recommended for starting and to the break-in procedures suggested below. Using the Proper Fuel and Glow Plug
Fuel and Glow Plug Note: Using the proper fuel and glow plug is vital in achieving reliable performance and is a must for long engine life. You must use fuel and glow plugs that are specifically designed for model car use. Never use any type of model airplane glow fuel! We recommend a high-quality car fuel containing 20% nitro methane (Blue Thunder 20% Sport fuel is recommended). A glow plug is included that is ideal for breaking-in your new engine. During the break-in process, it’s not uncommon to go through one or two glow plugs, as microscopic particles of metal (from the cylinder/piston wearing in) bond themselves to the plug element causing glow plug failure. We recommend the Sportwerks #3 Glow Plug (SWK8058) as the best replacement glow plug for this engine.
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Air Filter A clean, properly oiled air filter is a must to keep dirt out of the engine. Using the included air filter oil, spread the oil uniformly onto the air filter allowing it to saturate the foam element.
The Sportwerks Carburetor The Sportwerks .26 engine features a slide-valve carburetor and includes three inserts of various diameters. These carburetor inserts are used to alter the power curve of the engine. The three diameters included have the following effect: 6.5mm
7.5mm
9mm
– Gives smooth controllable acceleration; offers best fuel mileage; best-used for slick tracks/ surfaces or beginning gas drivers. – Develops good mid-range power; easier to control than the 9mm insert; best for medium traction, average-sized tracks/areas. – Offers explosive, sometimes difficult to control acceleration; uses the most fuel; used only for high traction, large track/open areas; for expert drivers only.
Setting the needles While the needles are preset at the factory, it’s a good idea to verify that the needles are properly set slightly rich for break-in. Following are the recommended starting settings: High-Speed Needle: 3 1/2 turns out (counterclockwise) from closed Low-Speed Needle: 2 turns out (counterclockwise) from closed. Note: When checking the adjustment of the low-speed needle, it is crucial that the throttle slide is closed completely and that you do not over-tighten the needles. When you feel resistance, immediately stop turning. This is the closed position.
High-Speed Needle Valve
Lean
Carb Insert Low-Speed Needle Valve
Idle Screw Lean Page 9
Starting Your Engine For The First Time Break-in The first startups and the first several minutes that your engine is running is the most critical time of it’s life and, in many ways, dictates how well it will perform and how long it will last. During the first runs, when the engine starts, the exhaust should emit blue/white smoke, indicating that the engine is rich (a good thing during break-in). During the first tank of fuel, you may wish to set a higher than normal idle speed in order to keep the engine from stalling. Drive your buggy while “blipping” the throttle and avoid operating the engine at full throttle for more than 2–3 seconds at a time. Run the entire first two tanks of fuel in this manner. After the first two tanks of fuel, begin leaning out the high-speed needle valve 1/8 turn at a time. It generally takes about 5 or 6 tanks of fuel before you’d want to start tuning for “maximum” power. Patience during break-in will be rewarded with an engine that performs reliably and to its maximum power potential. Remember, glow plug failure is a common occurrence when breaking in a new engine. To test your plug, let the engine idle at a properly adjusted low-speed needle setting with the glow igniter attached. Then, remove the igniter. If you hear no appreciable change in engine RPM, the plug is still good. If the engine loads up and the RPM’s decrease, it’s time to replace the glow plug.
Starting the Engine Step 1 Fill the tank with fuel
Step 2 Turn on the transmitter and receiver and confirm that the radio system is working properly.
Step 3 Attach the glow driver to the glow plug.
Step 4 Fully insert the electric start shaft into the back of the engine. Press the start button for ten seconds then stop. The engine should turn over but likely won’t yet start. Continue these ten second starting attempts several times until the engine starts.
Note: Should the engine not turn over when the electric starter is applied, the engine may be flooded (hydro-locked). Excess fuel in the combustion chamber can prevent the piston from traveling through its full range of compression, effectively “locking up” the engine. Should this occur, remove the glow igniter from the plug and, using a glow plug wrench (DYN2510), remove the glow plug and turn the model upside down. Give the starter a few short blips to clear the fuel from the combustion chamber then re-install the glow plug and try again.
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You may find it necessary to “blip” the throttle on the transmitter (applying throttle on/off) while trying to start the engine, as new engines are more difficult to start due to the tight piston/ cylinder fit. Never start an engine above 1⁄4 throttle or damage to your engine could occur!
Adjusting the Carburetor Tuning your Engine
Fine-Tuning Your Engine
Tuning the Low-Speed Needle
When tuning the needle valves for maximum performance, adjust them in small increments, 1⁄16 turn at a time. An engine should not be run too lean; doing so severely shortens the life of the engine. When an engine is set too lean, it will run very strong at first but will soon begin to sag and hesitate or stall when accelerating. The best way to tune an engine is by using an infrared temperature gauge, but you can also use water to check the head temperature. (Refer to “Fine Tuning Your Engine”)
As you gain experience, you’ll be able to tune your engine based on the engine’s sound and feel during acceleration and at full throttle. Until you’ve developed this skill, we recommend the following method of engine tuning. Start your engine and drive your buggy aggressively for about two minutes. Place a drop of water on the cylinder head. If the water sizzles away (evaporates immediately), the needle setting is too lean. A correct needle setting will result in the water evaporating slowly, in about 5–10 seconds. If the water does not evaporate, the needle setting is too rich. Lean the high-speed needle 1/8 of a turn and run the engine again, adjusting the needle setting to get the desired evaporation rate of 5–10 seconds. Check the temperature each time you change the needle mixture. Do not let the engine overheat, as this will damage the engine!
The low-speed needle (also referred to as the idle mixture or idle needle) should be set after you’re satisfied with the high-speed needle setting. After achieving the engine’s proper operating temperature, reduce the engine throttle to idle for about 15 seconds. Now pinch the fuel line with your fingers close to the carb fuel inlet nipple while carefully listening to the engine RPM. If the engine dies immediately without an increase in RPM, the lowspeed needle is set too lean. If the RPM ’s increase dramatically and then the engine dies, the setting is too rich. The ideal setting results in the RPM ’s increasing a slight amount (about 200 RPM’s) after pinching the fuel line before dying.
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Setting the Idle RPM The last setting to be made is the idle RPM. Turning the idle stop screw clockwise increases the idle speed; whereas turning the screw counterclockwise will make the engine idle at a lower RPM. Ideally, the engine should idle just fast enough to give a reliable idle but not engage the clutch and, of course, never flame out.
After Run Engine Maintainance After you’re finished racing for the day, it’s important to empty the fuel tanks and run the remaining fuel from the engine. Continue to try to start the engine for several seconds after it will no longer fire to ensure that all fuel is out of the engine. Put several drops of after run oil in the carburetor and turn the engine over on the starter box for several seconds to coat the internal engine parts with after run oil. Clean the air filter regularly, using warm soapy water then allowing it to air dry before applying air filter oil. Keeping your air filter clean and oiled is vital to the life of your engine.
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Brake Linkage Setup Although the break linkages are pre-set at he factory, it may be necessary to adjust them if you take the vehicle apart for cleaning or maintenance. The following covers the installation and adjustment of the linkages in such instances.
Step #3
Step #7
Be sure the ball links are snapped onto the front and rear brake and on the carburetor.
With the throttle at neutral, pull the front (silver knob) brake linkage through the molded pivot such that the front brakes are slightly applied. Loosen the setscrew on the silver adjusting knob and slide it into position such that it just contacts the molded pivot and retighten the setscrew.
Note: It may be necessary to adjust the position of the throttle return spring to allow the ball link to snap on the ball.
Step #4 Adjust the position of the return spring collar until the correct tension is achieved. With the throttle at neutral, the spring should just close the carburetor barrel with light tension.
Step #5 Loosen the setscrew in the blue knurled knob and slide the knob such that it just contacts the molded pivot on the arm; retighten the setscrew.
Step #6 Step #1 Turn on the radio system and adjust the throttle trim to the desired neutral position.
Step #2 Install the arm with attached linkage on the servo adapter such that the brake linkage will be parallel to the arm with the brake ball links attached.
Adjust the full throttle position with the programming in your transmitter such that the carburetor is full open just as the trigger reaches the full throttle position. By rotating the blue throttle knob, you can now precisely adjust the throttle dead band (the amount the throttle moves before the carburetor barrel actually opens) without disturbing the spring preload settings.
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Step #8 With the throttle at neutral, pull the rear (red knob) brake linkage through the molded pivot such that the rear brakes are slightly applied. Loosen the setscrew on the red adjusting knob and slide it into position such that it just contacts the molded pivot and retighten the setscrew.
Step #9 Cut off the excess lengths of linkage to clear the body. By rotating the silver adjusting knob, the front brakes can be accurately adjusted; rotating the red knob will affect the rear brake adjustment.
Initial Brake Adjustment With the radio on and the throttle trim at neutral, adjust the front brake using the silver adjusting knob until it just starts to apply pressure to the front tires. Now back the front brake off one turn. Adjust the rear brake using the red adjusting knob until it just starts to apply slight pressure to the rear tires then back the rear brake off 1/2 turn. These are the neutral starting settings for the front and rear brakes.
Center Differential
96
2
89 20
18
156
37
89
93 37
93
90 79
91
93
96
57
93
81 82 41
3
50 4 86 85
83 84
84
50 82
84
20 88
91 89
57
89
79
89 18
90
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Front/Rear Differential
78 87 57
84
88
83
86 84
85
83
82
84
50 84 83
84
50
57
83 82 80 4 78
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Front and Rear Shocks 63
73 73
64 67
26
73
72 33
34
63
75
73
64
73
67
74 72
74
73
67 72
74
74 74
73
73
70
74
73
26
34 67
75
74
73 68
73
66
74
74 65
77
73
71
72
73
33 72 71 72 72
73
73 45
72
73
71
73
44
72 71
73
74
72
74 72
74
74
69
76
74
72
74 72
74
74
75 73
70
74
73
75 45 44
75
Front Shock
Rear Shock
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75
Steering Bellcrank 3
95 95 3
95
95
95
95 34
36
95
95
34 95
95
95
95
95 13
95
34
95
13
95
45
52 51
45
95 45 56 13
95 45 95 52
45
95 95 56 95
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45
Front Suspension
111 47
110
167 35
111
116 28
B 167
24
48 130
109 6 25
13 106 107 107
57
23 54
118
57 34
50 128 106 127
107 107
40 127
23
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28
Front Gearbox Mount 37 5
115
37
99
3 8 174 3 34
123
19 173
23
61 112
125
62
123 18 3
24
18
108 17 112
133
37 133
3
45 133 133 44 133 38 133 45 133 44 133
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112
Center Driveshaft - Front
40
14
131
91
129
91
57 54 57 94
91
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Rear Suspension
45
44
53
45
40 127 19 111 57 54
128
34 119
57 111 130
176
28
6
28
120 167 46 35
28
24 117 48 167 28
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Rear Gearbox Mount 26
8
8
37 134 44 134 134
3
45 134 18
137
38 134 45 134
134
6
44 134
136 136
121
136
62 6
61
34
164
26
18
19 99
136 17
4 4
44
24
125
121
121
24 123 34 18 34
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123
Center Driveshaft - Rear 14
91
94 57 54 57
40
129 91
91
131
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Chassis 34
105
104 2
152 159
39
153
2 9 7
10
34
3 105 11 4 8
4
104
3 8 3 3 10
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9
Radio Tray Assembly 98
37
96
96 96
96 96
98 30
97
37
96
96
37
96
97
2
96
96
96 96
96 96
4
96
96 96 37
96
100
22
96
23 31
A
96
96
23
97 30
97
12 95
97 27
23
45
22
97
34 95
24
2
23 23 102
97
99
99 99
A
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157
95 51
Engine/Clutch/Air Filter 148 149
149 149
154 150 32 149 151
155 17
139 138
141
142
175
140 143 144 145 146 55
55
26
140 15
Page 26
149
Fuel Tank 27 135
49 135
135
135
1
135
135
135 23 71 135
22 135
71
43
Page 27
43
Wheel and Tire Assembly
126
60
60
59
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Key # Stock# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
SWK2022 SWK2024 SWK2026 SWK2028 SWK2032 SWK2036 SWK2054 SWK2056 SWK2062 SWK2064 SWK2074 SWK2087 SWK2089 SWK2106 SWK2122 SWK2124 SWK2128 SWK2130 SWK2139 SWK2141 SWK2222 SWK2224 SWK2226 SWK2232 SWK2254 SWK2282
27 28 29 30 31 32
SWK2290 SWK2292 SWK2296 SWK2306 SWK2311 SWK2324
Qty 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 8 8 8 8 8 8 8
Description
Key # Stock#
3mm x 6mm Flathead Screw 3mm x 8mm Flathead Screw 3mm x 10mm Flathead Screw 3mm x 12mm Flathead Screw 3mm x 16mm Flathead Screw 3mm x 20mm Flathead Screw 4mm x 8mm Flathead Screw 4mm x 10mm Flathead Screw 4mm x 16mm Flathead Screw 4mm x 18mm Flathead Screw 5mm x 8mm Engine Mount Screw 6.8mm x 11mm Ball Stud 6.8mm x 14mm Ball Stud 2.5mm x 10mm Socket Head Cap Screw 3mm x 6mm Socket Head Cap Screw 3mm x 8mm Socket Head Cap Screw 3mm x 12mm Socket Head Cap Screw 3mm x 14mm Socket Head Cap Screw 3mm x 23mm Socket Head Cap Screw 3mm x 25mm Socket Head Cap Screw 3mm x 6mm Button Head Screw 3mm x 8mm Button Head Screw 3mm x 10mm Button Head Screw 3mm x 16mm Button Head Screw 4mm x 8mm Button Head Screw Wing buttons 3mm Washers 1/8 E-Clips 3mm E-Clips 7mm Snap Ring 2mm x 10mm Phillips Head Screw 2mm x 15mm Phillips Head Screw 3mm x 8mm Phillips Head Screw
33 34 35 36 37 38 39 40 41 42 43
SWK2380 SWK2382 SWK2384 SWK2392 SWK2419 SWK2430 SWK2440 SWK2450 SWK2460 SWK2132 SWK2465
Qty 8 8 8 8 8 8 8 8 4 8 1 1 2
44
SWK2470 6 2 2 4
45
46 47 48 49 50
51 Page 29
SWK2480
SWK2500 SWK2505 SWK2510 SWK2515 SWK2520
SWK2550
4 2 4 2 4 2 2 2 2 4 2 2 1
Description 2.6mm Lock Nuts 3mm Lock Nuts 4mm Lock Nuts 3mm Nuts 3mm x 3mm Set Screw 3mm x 14mm Set Screw 4mm x 4mm Set Screw 5mm x 4mm Set Screw Threaded Chassis Inserts 3mm X 16mm Socket Head Cap Screw Chassis Stand-off Bag Front fuel tank standoff Rear fuel tank standoff Radio tray standoff Pivot Ball Bag 6.8mm pivot ball 8.8mm flange pivot ball 8.8mm pivot ball 6.8mm flanged pivot ball Rod End Bag 6.8mm short rod end 6.8mm medium rod end 6.8mm long rod end 8.8mm rod end 6.8mm shock rod end (Rear) Outer Susp. Hinge Pins 50mm (Front) Upper Susp. Hinge Pins 56mm Inner Susp. Hinge Pins 70mm Hinge Pins for radio box, fuel tank lid Pin Bag Wheel hub pins Outdrive pins CVD coupler pins Steering Link / Turnbuckle 3x36mm
Key # Stock# 52 53 54 55 56 57 58 59 60
SWK2560 SWK2570 SWK2600 SWK2620 SWK2640 SWK2660 SWK2701 SWK2740 SWK2840
61 62 63 64 65 66 67
SWK3000 SWK3002 SWK3004 SWK3006 SWK3008 SWK3010 SWK3012
68 69 70 71 72
SWK3016 SWK3018 SWK3020 SWK3022 SWK3024
Qty 2 2 4 2 4 4 1 2 2 2 4 4 2 4 2 2 2 2 2 2 4 4 2 2 4 2 2 2
Description
Key # Stock#
Tie Rod / Turnbuckle 4x50mm Camber Link / Turnbuckle 5x60mm Bearing Crush Sleeve Clutch Bearings 5x10x4mm Rubber Sealed Bearings 6x10x3mm Rubber Sealed Bearings 8x16x5mm Mayhem Buggy Body RTR (Blue) Dish Wheels, White Buggy Tires/Inserts 1/8 tire foam inserts 1/8 buggy tires Shock Standoff Nuts Shock Bushings Shock Caps Shock Bladders Front Shock Body Rear Shock Body Shock Adjustment Collar Adjustment collar O-ring Front Shock Shaft 54mm Rear Shock Shaft 64mm Shock Piston 2-hole 1.2mm Shock O-Ring Shock Rebuild Kit Washer 2.5x5mm Adjustment collar O-ring Shock O-ring Shock shaft bushing 3.4mm Shock shaft bushing 1mm Snap ring 7mm
73
Qty
SWK3026 2 2 2 2 4 2 2 2 2 4 4 4 4 4 4 4 4 4 2 2 2 2 2 2 2 2
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Description Front Shock Set Shock bladder Washer 2.5x5mm Adjustment collar O-ring Adjustment collar Shock O-ring Shock shaft bushing 3.4mm Shock shaft bushing 1mm 7mm snap ring Shock cap 1mm spring clip 2mm spring clip 3mm spring clip 4mm spring clip 5mm spring clip 6.8mm shock rod end Upper spring retainer Lower spring retainer Shock eyelet 3mm washer 3mm lock nut Shock adjustment collar 2.6mm lock nut Shock piston 2-hole 1.2mm Front shock shaft 54mm Front shock body Front buggy spring, black
Key # Stock# 74
Qty
SWK3028 2 2 2 2 4 2 2 2 2 4 4 4 4 4 4 4 4 4 2 2 2 2 2 2 2 2
Description
Key # Stock#
Rear Shock Set Shock bladder Washer 2.5x5mm Adjustment collar O-ring Adjustment collar Shock O-ring Shock shaft bushing 3.4mm Shock shaft bushing 1mm 7mm snap ring Shock cap 1mm spring clip 2mm spring clip 3mm spring clip 4mm spring clip 5mm spring clip 6.8mm shock rod end Upper spring retainer Lower spring retainer Shock eyelet 3mm washer 3mm lock nut Shock adjustment collar 2.6mm lock nut Shock piston 2-hole 1.2mm Rear shock shaft 64mm Rear shock body Rear buggy spring
75
76 77 78 79 80 81 82 83 84
SWK3040
SWK3050 SWK3060 SWK3070 SWK3072 SWK3074 SWK3076 SWK3078 SWK3080 SWK3082
85 86 87 88
SWK3086 SWK3088 SWK3090 SWK3092
89
SWK3094
90
SWK3096
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Qty 4 4 4 4 4 4 4 4 4 2 2 2 2 1 1 2 4 2 4 1 2 2 2 2 4 4 2
Description Shock Molded Parts Bag 1mm spring clip 2mm spring clip 3mm spring clip 4mm spring clip 5mm spring clip Upper shock eyelet Upper spring retainer Lower spring retainer Shock rod end 6.8mm Front Buggy Springs Rear Buggy Springs F/R Diff Output Yoke Center Diff Output Yoke 43T Diff Gear 46T Steel Spur Gear Differential O-Rings Spider Gear Shims .25mm Diff Gear Bag Bevel gears Spider gears Differential Gasket Differential Cross Pins Differential Shims Differential Case Bearing mount Brake Pads Brake pad spacers Brake Discs
Key # Stock# 91
92 93
94 95
Qty
SWK3098
SWK3102 SWK3104
SWK3106 SWK3108
1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 4 1 1 1 1 2 1 1 3 3 1 2 2 1 1 1
Description Diff Housing Bag Lower diff housing Upper diff housing Bearing support Center diff housing (upper) Center diff housing (lower) Brake stand-off Center Diff Support Plate (RTR) Brake Cam Bag Rear brake cam Front brake cam Brake post bushings 13T Differential Pinion Steering Servo Saver Bag Servo horn adapter 23T Servo horn adapter 24T Servo horn adapter 25T Steering servo arm Steering bellcrank bushings Upper servo saver Lower servo saver Steering bellcrank left Throttle ball cup Bellcrank post Servo saver spring retainer Servo saver spring retainer 3mm x14mm ball stud 3mm lock nut 3mm nut Drag link bushing 3mm x 10mm flathead screw Steering drag link Bellcrank shaft 3mm x 8mm socket head cap screw
Key # Stock#
Qty 1
96
SWK3110 2 1 1 1 1 1 1 1 1 3 1 1 1 1 4 3 2 1 1 2
97
SWK3112 1 1 1 1 2 6 1
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Description Countersunk washer Throttle Linkage Bag Threaded servo arm guide pivot Countersunk servo arm guide pivot Servo horn adapter 23T Servo horn adapter 24T Servo horn adapter 25T Throttle/brake servo arm Linkage adjuster-red Linkage adjuster-blue Linkage adjuster-silver Linkage wire Locking collar Linkage spring Silicone tubing-rear brake Silicone tubing-front brake 3mm x 3mm set screw Throttle ball cup Ballrod linkage 3mm x 8mm socket head cap screw Countersunk washer Servo arm bushing Radio Box Bag Radio box bottom Radio box center Radio box top Hinge pin 1mm E-clip 2mm x 10mm phillips head screw 2mm x 15mm phillips head screw
Key # Stock# 98
Qty
SWK3114 1 1
99
100 104
SWK3116
SWK3118 SWK3126
2 2 1 1 1 2 1 1 1
105
SWK3128 1 1
106
SWK3130 4 4 4 4 8
107 108 109 110
SWK3132 SWK3134 SWK3136 SWK3137
4 4 2 2 2
Description
Key # Stock#
Antenna Bag Antenna Antenna cap Mount Bag Servo mounting pads Stand-up servo mounting pads Front body mount Rear body mount Transponder mount Steering servo mounts Switch Cover Bumper Bag Front bumper Rear bumper Chassis Mud Guard Bag Mud guard left Mud guard right Pillow Ball Assembly Bag Pillow ball 14.6mm Pillow ball insert Pillow ball retainer plate Pillow ball cap 3mm x 10mm button head screw Retainer Plate/ Ballcap Bag Pillow Ball Retainer Plate Pillow ball cap Hinge Pin Bushings Front Lower Suspension Arms Front Upper Suspension Arms
111
Qty
SWK3138 2 2 2 2 4
112 115 116
SWK3140 SWK3146 SWK3148
1 1 1 1 1
117
SWK3150 1 1
118
SWK3152 1 1
119 120 123 124 121
SWK3154 SWK3156 SWK3160 SWK3162 SWK3158
1 1 2 1 1 1
125
SWK3164 1 1
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Description Caster/Camber Shim Bag Upper hinge pin bushing Camber shim 1mm Camber shim 1.5mm Caster shim 2mm Caster shim 2.5mm Front Bulkhead Bag Front bulkhead, F support Front bulkhead, R support Upper Hinge Pin Support Front Inner Suspension Mount Bag Front left carrier block Front right carrier block Rear Inner Suspension Mount Bag Rear left carrier block Rear right carrier block Steering Knuckle Bag Front left steering knuckle Front right steering knuckle Rear Hub Bag Left rear hub Right rear hub Rear Suspension Arms Chassis Stiffners/Mounts (RTR) Rear Shock Tower (RTR) Rear Bulkhead Bag Rear bulkhead, F support Rear bulkhead, R support Bulkhead Brace Bag Front bulkhead brace Rear bulkhead brace
Key # Stock# 126 127 128 129 130 131 133
SWK3168 SWK3170 SWK3172 SWK3173 SWK3174 SWK3175 SWK3180
Qty 2 2 2 2 2 4 2 2 4 1 2 4 2
134
SWK3182 2 2 4 1 2 4 2
Description
Key # Stock#
17mm Wheel Nut Wheel Hub Wheel Hub Pin Center Drive Cup Front/Rear Buggy CVD (pr) Dogbone Pin Front Sway Bar Bag Sway bar pivot ball 3mm x 14mm set screw 3mm x 3mm set screw Front sway bar Sway bar mounts 6.8mm short rod end 6.8mm pivot balls Rear Sway Bar Bag Sway bar pivot ball 3mm x 14mm set screw 3mm x 3mm set screw Rear sway bar Sway bar mounts 6.8mm short rod end 6.8mm pivot balls
135
Qty
SWK3184 1 1 1 1 1 1 1 2 1 1 1 2
136
137 138 139 140 141 142 143 144 145 146 148
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SWK3186
SWK3188 SWK3190 SWK3192 SWK3194 SWK3196 SWK3198 SWK3212 SWK3213 SWK3214 SWK3215 SWK3230
2 2 2 1 1 1 1 4 3 3 1 1 1 1 1
Description Fuel Tank Assembly Lower tank half Upper tank half Fuel tank lid Fuel tank baffle Fuel tank internals 3mm x 6mm flathead screw Hinge pin (radio box, fuel tank lid) 1mm E-clip Cap spring Fuel tank cap gasket Splash guard 3mm x 8mm button head screw Wing Mount Bag Wing strut Wing brace Wing mount Wing (white) Flywheel Collet Clutch Nut Bag Clutch nut Shims Clutch Springs Clutch Shoes 12T Clutch Bell 13T Clutch Bell 14T Clutch Bell 15T Clutch Bell Air Cleaner Boot
Key # Stock# 149
150 151 152 153 154 155 156 157 158 159 160 161 162 163
164 165 167 173 174 175 176
Qty
SWK3232
SWK3234 SWK3236 SWK3238 SWK3240 SWK3242 SWK3250 SWK9102 SWK9120 SWK9122 SWK9124 SWK9133 SWK9142 SWK9144 SWK9160
SWK9162 SWK9108 SWK3133 SWK3142 SWK3144 SWK2227 SWK2441
1 1 1 2 1 3 1 1 1 1 1 1 3 1 1 3 1 1 1 2 1 1 1 1 1 1 2 8
Description
Key # Stock#
Air Filter Bag Air filter top Air filter bottom Foam filter Tie wrap 3mm x 8mm phillips head screw Manifold/Pipe Springs Manifold Adapter Tuned Pipe Mounting Wire Tuned Pipe Mount Manifold Tuned Pipe Pro Center Diff Support Plate Pro Servo Tray Standoff Pro Servo Tray Pro Main Chassis Pro Pin Brace Bag Pro Hinge pin brace Pro Rear hinge pin brace Pro Front Shock Tower Pro Top Plate Pro Chassis Stiffener/Mount Bag Pro Chassis stiffener mount Pro Front chassis stiffener Pro Rear chassis stiffener Pro Rear Shock Tower Pro Steering Drag Link Pin Brace Bag (RTR) Front Shock Tower (RTR) Top Plate (RTR) Engine Mounts (RTR) 4mm x 8mm Set Screw
SWK3260 SWK3261
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Qty 1 1
Description Electric Starter Electric Starter Backplate Assembly (.21-.26)
Setup Sheet Gearing:
Driver Date Lap times
Front Shocks:
Clutch Bell
Pistons
Spur Gear
Oil
Clutch Shoe Position
Springs
Track Conditions:
Lower mounting position on arm:
In
Out
In
Mid
Differential Fluids:
Traction:
Slick
Medium
High
Surface:
Smooth
Bumpy
Rough
Front
Layout:
Tight
Medium
Open
Center Rear
Front Suspension:
Engine:
Track/Width
Type
Camber Angle Forward
Caster Position
Rearward
Toe In
Plug Deck Clearance
Droop
Oil
Temperature
Ground Clearance
Springs
Comments
Rear Suspension:
Lower mounting position on arm:
Tires:
Track/Width
Front
Camber Angle
Type
Toe In
Compound
Droop
Liner
Roll Bar
Rear
Ground Clearance
Hub Position
Pistons
Fuel
Roll Bar
Hub roll Center
Rear Shocks:
Exhaust
Type Upper
Front
Lower Mid
Rear
Compound Liner
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Out
Setup Sheet - Stock Settings Gearing:
Driver Track Lap times
Front Shocks:
Clutch Bell
14
Pistons
2 hole - 1.5mm (stock)
Spur Gear
46
Oil
30 wt
Clutch Shoe Position
Trailing
Springs
Black
Track Conditions:
Lower mounting position on arm:
Slick
Medium
High
Surface:
Smooth
Bumpy
Rough
Front
5000
Layout:
Tight
Medium
Open
Center
5000
Rear
1000
Engine:
Track/Width
12.1 in
Camber Angle
1.5 degrees Forward
Caster Position
Rearward
Toe In
-1 degree
Droop
Not used
Roll Bar
Stock
Ground Clearance
Drive shafts level
Type
Sportwerks .26
Plug
SWK8058 #3 Glowplug
Deck Clearance
.053
Exhaust Fuel
Rear Suspension:
Blue Thunder 20% (DYN2270)
Temperature Comments
12.2 in
Camber Angle
1.5 degrees
Type
Toe In
3 degrees (stock)
Compound
Droop
Not used
Liner
Roll Bar
Stock
Ground Clearance
Arms level
Hub Position
Upper Front
Front
Lower Mid
SWK blocks (stock) Stock
Rear Type
Rear
SWK blocks (stock)
Compound Liner
Rear Shocks: Pistons
2 hole - 1.5mm (stock)
Oil
30 wt
Springs
Black
Lower mounting position on arm:
Tires:
Track/Width
Hub roll Center
Out
Differential Fluids:
Traction:
Front Suspension:
In
Stock
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In
Mid
Out
Specifications and Other Information Brake Knob - Color Code Red - Rear brake Silver - Front brake Blue - Throttle The Mayhem Comes Filled with the Following Fluids Shocks - 30 wt. oil front and rear Differentials - Center - 5000 wt Front - 5000 wt Rear - 1000 wt Specifications - Chassis Overall Length - 492mm / 19.4 in Width - 310mm / 12.2 in Wheelbase - Adjustable 325mm–330mm / 12.8–13.0 in Caster angle - Adjustable 17–24 degrees Fuel tank capacity - 126cc Internal gear ratio - 3.31 to 1 Pinion gear included - 14 tooth Spur gear included - 46 tooth Diff pinion gear - 13 tooth Diff ring gear - 43 tooth Shock pistons - 2 hole / 1.5mm diameter holes Wheel hub size - 17mm Ball bearings - Transmission - 8x16x5mm Clutch - 5x10x4mm Steering - 6x10x3mm
ROAR and IFMAR 1/8 Scale Buggy Rules Minimum track width - 10 ft continuous Maximum length - 730mm / 28.74 in Maximum width - 310mm / 12.20 in Maximum height - 250mm / 9.84 in Wheelbase - 270–330mm / 10.63–12.99 in Minimum weight - 3200g / 7.05 lb Maximum wheel diameter - 44.45mm / 1.75 in Tire diameter - 109.2–119.4mm / 4.30–4.70 in Maximum tire width - 46.99mm / 1.75 in Maximum engine displacement - 3.5cc / .214 cu in Transmission - 1 speed only Tires - rubber only Race length - Qualifiers - 5 minute Mains - 5–60 minutes
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Tuning Tips Differential Fluids Changing the viscosity of the fluid in the differentials affects the way the car handles and performs. The Mayhem differentials come pre-filled with 5000 wt. fluid in the center and front and 1000 wt. fluid in the rear. For most conditions, this is a good place to start. Center: Changing the fluid in the center differential affects the front to rear drive. To conceptually understand how the center differential affects handling, think of it as frontwheel vs. rear-wheel drive. Heavier fluid gives more rear-wheel drive effect, resulting in more acceleration and more on-power steering. Lighter fluids in the center differential allow the front tires to unload during acceleration, giving more front-wheel drive and reducing power-on steering. When your car under-steers during acceleration, try switching to a heavier fluid in the center differential. When your car over-steers during acceleration, try switching to lighter weight diff fluid in the center. Typically the optimum center differential fluid is between 3,000 to 10,000 wt. depending on track conditions (slick surfaces = lighter center diff fluid). Front: The viscosity of the fluid in the front differential affects overall steering authority. Heavier fluid reduces steering while lighter fluid gives more steering. However, if the fluid used in the front diff is too light the steering can become inconsistent, especially when accelerating from corners. Typically the optimum front diff fluid is between 3000 and 7000 wt.
Rear: The fluid in the rear differential affects cornering traction and overall steering. Lighter fluid in the rear diff gives more cornering traction and more steering, while heavier fluid reduces rear side bite while reducing steering authority. Some racers replace the fluid in the rear differential with thin grease for even greater rear cornering traction. Nearly all racers use 1000 wt. fluid or light grease in the rear differential to get maximum rear end traction.
Choosing Tires The single most dramatic factor affecting your car’s handling is tires. Before you begin changing your setup, it’s important to choose the best tires for the conditions. While experimenting with various tread designs, compounds and liners is the optimum way to find the best combination, it’s time consuming. If time is limited, find out what tires the fast guys are using and duplicate their selection.
Caster The Mayhem offers two caster positions: arms forward and arms rearward. Moving the clip in front of or behind the upper front arms easily changes caster position. The rearward position gives slightly more steering in the midsection and exiting turns, while reducing the steering on entry. The arms forward position gives more steering at corner entry, while slightly reducing the midsection and exit cornering authority.
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Shock Locations The Mayhem offers three lower rear shock positions and two lower front positions. Several upper shock locations are available. Lower Shock Positions: Moving the lower shock mounting position will change the suspension’s mechanical advantage. Moving the mounting position inward has a similar effect as using softer springs and lower weight oil. Moving the lower mounting position outward is similar to stiffening the spring rate and increasing the oil weight. If the suspension is too soft (bottoming out), moving the lower shock outward will increase the rate. If the suspension is too hard (lack of traction), moving the lower suspension mounting position inward will decrease the rate giving more traction. Remember the optimum setting is a fine balance between the front and rear. Upper Shock Positions: Moving the upper shock mounting position inward gives a more progressive spring and damping rate. Progressive rate means as the shock is compressed, the spring and dampening rates increase more quickly. Standing up the shocks “to their outer mounting positions” gives more linear dampening and spring rate. Note: There are two sets of upper mounting positions located on the shock tower. The uppermost holes are used when the shock is positioned in the inner mounting position on the arms. The lower set of holes is used when the shocks are mounted in the outer suspension’s arm positions.
© 2004 Horizon Hobby, Inc. 4105 Fieldstone Road Champaign, Illinois 61822 (877) 504-0233 www.horizonhobby.com 6607
