A Tyco 440-X2 narrow chassis platform without traction magnets. Traction mags are replaced with two (2) brass weights in the each empty traction magnet cavity. Exact-fit brass weights are out there that fit the 440-X2 traction magnet cavity perfectly. If you can’t find those, a 1/4″ solid brass rod can be cut to fit—they work great. I have a bunch of 1/4 brass rod and will be happy to make a batch of weights available for those who might need them. The other unique part for the “Tyco Jet” platform is a Wizzard WTS13 independent front-end. Other than the above specific changes and the required changes in downforce restrictions, all SJSCC rules for the U-Build Lambo class apply.
Just prior to each driver qualifying, their car will be quickly visually inspected and two measurements will be taken: 1) Car must pass through standard 1-5/16 tech block; 2) The car’s downforce will be measured on a host-chosen standard VRP MDM. The specific maximum downforce limit is is a variable but will be announced prior to each race.
Bodies, of course, will be any Indy/CART/F1 production hard body but must be complete with front and rear wings and all original OEM plastic–no exceptions. “Stock” means stock, no modifications other than what is permitted here.
Chassis and Bulkheads:
Stock Tyco (440 x2) or Mattel narrow pan chassis, any country of origin. Loose bulkheads may be shimmed. No ball bearings. Rail wear is permitted but bulkheads cannot be sanded or otherwise modified. The front axle holes may be reamed to .052”. Peening is allowed.
Must use stock type armature (6 ohm minimum). May use hot stock 6 ohm arms.
Must use stock Tyco motor and traction magnets. Zapping is permitted for motor magnets. Traction magnets may be reverse zapped. Completed car must measure no greater than ? grams of force on VRP downforce meter.
You may use any brand shoes you like. You may use any brand stock format motor brushes and springs (no big foot types).
Stock gear ratio (7/25) but may use whatever brand plastic gears you prefer as long as ratio is maintained.
You may use any brand front wheels and axles including independent set-ups. Width maximum 1.312 inches including tires. The Wizzard WTS13 independent front-ends are recommended to maintain optimal shoe tension.
Rear wheels and axles may be stock or aftermarket. Any material may be used. Any flange-type allowed. Width maximum 1.312 inches including tires.
Rear tires will be slip-on silicone (recommend green compound A super tires or .440 minimum diameter). Any brand silicone slip on rear tires OK. No sponge-silicone tires (dual compound).
Only one guide pin may be used. Any brand guide pin may be used.
Other than the above specific changes and the required changes in downforce restrictions, all SJSCC rules for the U-Build Lambo class apply.
- If the usability of any part is in question then use the stock OMS component(s).
- Note that the rail typically measures 0.015 tall around HSRW. SJSW rail height is 0.013. Stewart Raceway ~.013
- No component on car may measure more than 1.312 wide (wheels, chassis, body, etc.).
- Races shall be run at 12.5 volts +/- .25 volts minimum and 15.0 volts maximum.
- Final interpretation is with the race director.