Just out of curiosity, how much do you guys think the 20" rims that came with my car ('96 Z28 w/ intake exhaust and tuned for the rims) are slowing me down? Like in tenths/second in the quarter mile. I plan on putting the stock rims back on when i go to the track but just wondering. Also, the the front tires are 245's and rear are 275's. Thanks

 

at least .3 seconds,they are bigger and heavier.I dont see how you tune your computer for bigger rims other than speedo wise