Originally Posted by Tomradio
Good job at the birds fellas, looking forward to your setups.
Also liljohn1064 can you could post your VTA setup. The VTA class is starting to take off at my local track. thanks
I'm using the G4 23 mm tall springs. Light greens in back, light blue greens up front, 40 Wt oil front and back. I Run Associated Spring cups to lower the car.
Ride height is 5.5 mm front and 6 mm back.
Front caster is standard.
Camber is -1*
Toe is 0*
Front shock is all the way in on the top, in the inner hole towards the chassis on the bottom arm to clear the tires.
Rear Camber is -1*
Toe is stock 2.5*
Rear shock is second hole in on top, outer hole on the bottom.
I also now run carbon E4 shock towers front and back and the front one way in both cars.
Rear arm mod: Shave the first 3 mm off the front cone of the Rear lower arm and slide it forward with spacers. DRAMATIC handling increase. Do not use the FS rear arms! I tried, messed up the ride height badly.
Ackerman is left alone, All links are as high as I can get them and as far in as possible on the bulkhead.
I run an SMC 4000 28C and the wires route right past the ESC cooling plate. Any top routing lipo will work also. I have not tried the plug in connector type batteries at this point. If you need to add weight to the belt side, it fits perfectly right by the rear belt tension pulley on the bottom of the chassis and does not rub the belt. I think I have 4 pieces of lead in mine to balance it.
A gotcha or two, because the front wheels for VTA have such massive backspacing you will rub the inside of the tire if you don't set your end points. The steering arm can also make contact with the front pulley and will rip it to shreds.
I'm running PRS Spurs and pinions. Spur is 94, pinion is a 44 or 43 at the moment, but can go up to a 46 for a perfect 4.2. If you run 4.2 make sure you have the motor heat sink.
Tip 1: Don't race on new tires. Unlike TC Tires these things don't come in for a few races. Go clean off the form release and scuff them by running on clean pavement with out compound. The minute they shine goes away, you're set.
If you run carpet, sauce the whole front then practice. By the end of the day, I'm usually only running in on the inside 1/8 of the tire. I never pick up fuzz on my tires and never ever lose traction for the whole race. If the front end still slides after initial practice, add another -.5* camber.
for the gent who asked if this chassis is tweaked: NO, but it sure flexes nice.