Originally Posted by
PHI/BMI racer
BMI12RR
Front:
0.020" springs
10 deg. reactive caster blocks
shims on either side.
kingpin shims - 3 on top and 1 above steering arm.
ride height 6 mm
40 SH ATS tires (44 mm diameter)
Servo angled - ball studs in center of servo saver position.
Rear:
30 SH ATS tires (47 mm diameter)
ride height 6 mm
Hard L-bars on short position
Center:
shock spring - gold
shock oil - 30 weight
ball stud - tall (BMI)
ride height 6 mm
batteries back position
antenna mount position - back
side dampers - 5000 weight diff. oil
Radio:
dual rate - 90%
This is my set-up. I tend to have under steer. If I change to softer tires on front, they wear out very quickly and after 4 minutes I am on the rim and back to no steering. The other problem is that the car traction rolls at high speed cornering.
Stiffen the oil in the tubes. Try going to 20,000 wt. and get the ride height down some. Also put 10,000 on the kingpins. Lowering the ride height will stop the traction rolls and the dampening will help the understeer. Also try running 35 shore tires front and rear. This is what i usually run.