2000 civic SI with b16 makes 300 hp to the wheels. has stage 3 clutch when I shift at 9500 rpms it jerks to the left and right. how do I reduce this?

 

<p>With a proper alignment, and an LSD/ATB.</p>

 

Is your alignment off?

 

If, your car doesn't already have them you might want to consider 70 or 80 durometer polyurethane for your transmission and rear engine mounts. Should help keep to the wheels planted and reduce torque steer. however, the side effect will be increased engine/car vibration.

9500 rpm's...when does the rev limiter kick in?

 

the suspension isn't connected to the transmission... how would poly motor mounts prevent torque steer?

OP: equal length drive axles help to even the distribution of torque to each wheel as does an LSD as NotARaCist mentioned. you may also want to limit the forward movement of the front LCA under load to reduce it's effects as much as possible.(the drive force from the wheels pulls forward at the lower ball joint, this tries to pivot the LCA around the front bushing. the rear bushing does it's best to resist). stiffer rear LCA bushings would be a good step one. adding a "traction bar" would be even more effective at reducing this movement.

 

Change ALL your bushings in the front (including steering rack). Replace the front tires and get an alignment.

I'm still confused as to how you have 'torque' steer....

 

buy a traction bar for a few hundo. problem f***ing solved.

This one, buy this one. and never ask about this ever again.

http://www.full-race.com/store/tract...ction-bar.html

 

These are good reads: Torque Steer: Causes and Cures and http://www.ehow.com/how_8784078_fix-torque-steer.html