Last year I had no tire slipping issues with my Cooper 2XS Zeons 245/40/17, I could ease out in 1st, floor and it hooked every time with the 4.10 gears.

Now I cant do this, of course I have installed headers, pulley, LT4 valve springs, 1.6 RR's, new tune and pulled the catalytic converter. If I smoke the tires real quick they get sticky enough for a hard launch.

If I still have this problem once things warm up a bit I might need to go to 3.73's cause I want the thing to hook.

Oh, well. I guess too much power is not a bad thing.

 

i would think it would be cheaper to try something like relocation brackets and a poly torque arm mount to help firm up the rear.

could make all the difference.

 

I have the relocation brackets, they have not been put on yet.
I will get the poly mount too.

 

There's no such thing as "too much power". Your problem is "not enough traction".

A 245/40-17 is a pretty skinny tire, and its way undersized for diameter, with narrow sidewalls. The fact that it is 1" smaller diameter than a stock tire is making your 4.10's act like 4.25's (if there was such a gear). Put some decent tires on there..... a 275/40-17 Goodyear Eagle F1 GS-D3 would probably double the traction capabilities of the car. Or consider a drag radial for the track.

Then work on the suspension.

 

stickier tires might help that as well

 

Whoops, typo.
I do have 275/40/17 Cooper 2XS Zeons.

 

drag radials will solve your problem...

 

Im sure, but I want to maintain my street tires.
Im not talking track problems here, I know the drag radials will hook like a big dog.