Do you guys bother dropping your front tire psi when you head to the track? What do you usually drop it down to? Thanks for the input gentlemen, appreciated as always

 

i was always told that lowering psi on street tires acctually hurts. i think i gives you a better 60' but hurts on the top end as it takes more power to get an underinflated tire down the road

 

we need to get some radicals joe because after our performance, we shouldnt even be allowed at the track

 

I have a stock sport 5spd. 2.4. I was wondering the same thing. I had a 2.21 60' and looking around on this website thats pretty good. That was 32psi. Ran 15.01@92mph last night at cecil county, md.

 

i havnt ever done it, but the guys i went to the track with a while back dropped their front tire psi down to about 20-22. some went lower, some went higher. just depended on what hooked the best. i say start out at 32, then start dropping it in 2 psi increments until your times cant get any better. hope that helps!

 

I believe it was posted in a thread a while back that lowering it to ~24psi give or take was the best and below that it seemed to hurt performance. I could be wrong, I'll try to find the thread.

 

i ran 40psi on my 14.4 run

 

Try to gauge what works best for you. When I used to bracket race for money I read up on tire pressure and tried lowering the PSI to see if it would help -- according to the information the best way to find out is to "burn Rubber". Leave a patch of rubber on the ground and look at it. Basically you want a solid black mark all the way across -- if you don't, add or remove air until you do. If you have rubber all the way across (side to side) then your tire is gripping the best that it can. If you lower the pressure too much you will begin to see rubber only on the outside of the tread mark and that indicates that the sidewalls are holding up the tire and you are losing traction. If the rubber is concentrated on the inside of the tire track then you have too much PSI. Personaly I found that the factory specs worked best on the track with street tires.

 

20-25psi is decent

 

i dropped mine to 25 and ran the best time yet!

 

If you run as much as 10 PSI or more below factory recommended pressure run a chalk mark across your rim and tire to make sure you are not spinning the rim inside the tire. You could be surprised. Experience taught me that when I thought lower pressure was keeping me from spinning the tires it was actually quieter because the rim was spinning in the tire.

 

Ran this past weekend hit first couple of runs I was hitting 14.5 consistantly @ 40 psi, dropped to 28psi and started running 14.1s. Just an observation on my part.

 

well with 25 psi i hit a 2.0 60 on the stock perellis. i cant remember exactly what the run was but it was 1000 ft and it was at the time my best. im gonna say in was 11.0? or maybe 11.1? but cant remember.

 

All of my racing experience has had me play with tire pressures a lot. On the stock Pirelli PZero Rosso I was only going down to 28psi, on Pirelli PZero Nero I was going to 26psi, on the Hoosier DOT QTPs I am running 17psi (still playing with this, 16.5 seems to work the best so far). However, I always up my rears to 45psi. Less squat on the rears when launching allows for more traction up front.

 

^^^your sig says you have an ss/sc but your 1/4 mile time is way off...?

 

Did you see his corrected altitude ? 7,000-10,000 feet above sea level. Not bad for that altitude. Here on the east coast the worst corrected altitude I ever saw was 3,400ft. and thats dam near 100% humidity and 100 degrees. You guys out in Texas are about the same as on the east coast depending on what part of Texas.

 

On 30psi I ran 13.6, as soon as I dropped it to 23psi I ran a 13.1 on Falken Azenis.

 

mine were at 45psi when i hit the 14.0

 

im on the southeast part of texas. im about 45min from houston and 20min from LA

and i mean DEEP south east. your not cool unless you have dual flowmasters on your 4 wheel drive and have a mullet with a cut off flannel t-shirt and yell GET-R-DUN every time you see someone you know hahaha