I finally have car somewhat tuned, waiting for dyno time, and it is fun! The problem I have is it blows tire, always. I have installed the Spohn torque arm and have it adjusted to -2degrees of pinion angle. I thought this would have helped out alot, but it made little to no difference. I have, in my garage, a set of Spohn LCA's with the adjustable poly/spherical design and relocation bracket that I have not found the time to install yet. I also have Steve's subframe connectors, also waiting to be installed.

Couple of questions. What is the goal of adjusting the LCA's? How do I adjust them to increase traction? I understand the concept of the relocation brackets and their benefit. Also, are these mods enough, or do drag radial really make that much of a difference? Should I replace struts also? Maybe add airbags in rear? What tire pressures are you guys running with your drag radials on the street?

I always thought it would be a cool to have a car that could shred tires at 40mph, but now I wanna get this baby too hook before I get embarrased in my own cloud of smoke.

Thanks guys.

 

What kind of tire do you have?

How much power are we talking about?

 

oh yeah, that might help. No dyno numbers yet. I'm estimating low at 400hp/475tq to the rear wheels. I have the stock BFG's that came on the car.

 

You need new tires. You will scrafice a little handling for better acceleration. Drag radials or ET Steets... My car is SCARY on anything else and I'm putting out a bit more HP/Torque than you..

 

The LCA's will definately help traction as well. Lower control arm angle effects " Anti Squat ". Anti Squat affects traction under acceleration. More " Anti-squat " generally equals a harder launch. ( Too much can also cause other problems such as wheel hop under braking...but that's generally not a problem with Drag Racing )

When you lower the car without LCA's the lower Control Arm Angles lose all " Anti Squat " geometry...definately not good for traction.

For Autocross or general street use you want the Lower Control arms level. For Drag Racing you can adjust the Lower Control Arms to be slightly lower at the rear. This will give more Anti-Squat...which is good. However it also induces something called " Roll Oversteer " which can be very, very bad when turning corners. Can make the car absolutely evil under hard cornering. Be carefull there!!!