Originally posted by blitzu+Jul 24 2004, 07:51 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (blitzu @ Jul 24 2004, 07:51 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-horist@Jul 24 2004, 07:40 PM
sweet times jarrad!!!! :lol:
not bad at all for 2 minor mods on a stock GTO ... I'd offer you my Nittos... but the 15" rims they're on prolly won't fit your car (without some grinding of the calipers)
I have nittos, but I can't figure out how to stop the wheel hop from the IRS!!! lol Ill get it one of these days. [/b][/quote]
I had a 1972 Corvette that I ran 9.50's with a modified IRS and a 10.5" street tire. The key is a combo of shock valving, spring rate, traction bar, and toe out. I ran a HD 500 lb. spring along with Koni Drag shocks (front were 90/10, back 50/50), a custom made traction bar that went from the bottom of the differential to the nearest chassis crossmember. You also want to run 2-3 degrees of toe out so when the car squats you don't lose contact patch due to toe in.
With IRS the key is good weight transfer and rear end squat. Be careful with more power and hookup due to half shaft twist and breakage. I had to have Strange make me a custom pair of stub axles to counter axle twist.
My car hooked hard (It was also a 5 speed) with 60 foots in the 1.32 range. I learned alot about IRS the hard and expensive way but I wanted to keep my Vette stock looking.
If you need any help, let me know.