I have a 2000 TA stock engine,ls6 intake,h/ory,k&n,9" 3.25 gear, th350 trans brake,vig 3400. The car ran 1.78 60,7.9@89,12.30@111.1 with the maf sensor bad.i could not get the afr under 13.2 and it was 13.5 most of the pass.

Now it has a new maf (I have control of the afr),lost 70 lb by going to 15" streetlites,and lost another 50lb odds and ends.

What should it run? 1/8 & 1/4

 

If you had some good tires put on when you went to the streetlites, you should be comfortably in the 11s in the 1/4, depending on track conditions and other misc factors

 

I was mostly wondering what I would pick up from the weight loss from the wheels(70 lb unsprung )weight and the (50 lb sprung weight).It had 315/30 18 hoosier DR before and now has 275/50 15 hoosier DR on the streetlites.

 

About 1/10 for every 100lbs of static weight removed.