I have all stock suspension.I have a 02ss lid,maf ends,maft,macs,373,vig 3200,hpp3,& nx wet 100 shot.I run on 16"ets,skinnies,front sway bar off,jack & spare out and get a best of 1.74 n/a and 1.70 n2o.I have tryed anywhere from 800 launch to 2500 running tire psi from 14psi to 20 psi still no better 60fts WTF? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

 

I would lower tire pressure to around 10 psi or lower start there and see what happens dont want the car to get lose did you get your computer fixed <img border="0" alt="[fight]" title="" src="graemlins/gr_punch.gif" />

 

I wouldnt lower them more than 11 psi,can get a pretty ugly sway with less than that

 

I tried 10psi it didnt get a good contact patch at all.I ran 275/40/17s this weekend in full street trin and got my best 60ft ever with a 1.68 n/a.My computer still isnt fixed check out my post on computers. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />