brandonppr

iTrader: (9)

My car 60s around 1.4-1.5 and runs low 7s eighth mile. I would say my race weight is low 3Ks.

Why do I have to run 20+ PSI? if I lower it I spin and the car is hard to drive. When I run 20+ the car hooks and goes down the track perfect. The lower I go the worse it gets. It seems most are running lower PSI than me. Any idea why I need more PSI to hook and go staight better?

When the pressure is low the tire spins a couple times and then hooks and while going down the track it sways back and forth and I have to steer it all the way to the end.

When running higher psi it just hooks and goes perfectly straight.

Running ET Street bias ply 26 11.5 15

omar_286961

iTrader: (4)

Do you notice a difference in et when its lower,and does your 60ft change when going lower?

SWeiser31

iTrader: (9)

Are most of the people you're referring to running the 26" tall tires? 20 does seem a bit high, but a smaller tire will generally take more pressure. I'm running 13.5 lbs in my 28x12.50x15. Feels just fine on the big end too.

z28241

iTrader: (13)

So what are you complaining about?? Do what works best for You!..

brandonppr

iTrader: (9)

Yes defintley my 60 is off and my ET suffers.

My car is very consistant. I bracket race and it usually does very well at being consistant as long as I keep the psi up.

brandonppr

iTrader: (9)

LOL I'm defintley not complaining. I was just curious. The announcer at the track had the mic in the pits asking drivers questions and asked me what PSI I run and seemed to be suprised when I told him.

z28241

iTrader: (13)

Maybe your tire guage is off?

brandonppr

iTrader: (9)

I don't think that is it. I have checked it with other gauges.

z28241

iTrader: (13)

As stated..just do what works for u bro..that 60 isnt bad!

omar_286961

iTrader: (4)

Yeah, just stick with that, does the psi change after warming up the tires? Is it 20 after a nice burn out or what?

nmass399

Wow maybe i need to try that much air pressure lol. Mine does not like much air pressure around 11 cold. I have not tested with other air pressures. I use to run mine around 13 cold but it started spinning bad.

brandonppr

iTrader: (9)

Thanks. My best 60 was on 26 11.5 17 ET Streets. Which was a 1.47. My best ET was on the tires I am running now. I know the car has a lot more in it, but I'm scared to change anything on the tune because it runs so consistant right now and being I bracket race I hate to mess with it. I know its running a little rich.

darrensls1

I hook best at 20 psi with MT street radials. I also spin if I go much lower. IDK, maybe it's because of the stock tire size I run (255/50/16).

brandonppr

iTrader: (9)

I just got back from the track. I decided to try going up on the tire pressure. It actually seemed even better. Usually on tues the track prep and street cars make the track crap. I decided to try 26 PSI. the car had 26 PSI on each of these passes. On one pass I let out because it was elimation and I was way ahead, but going by my 60 and 330 I think it would have been 7.26

omar_286961

iTrader: (4)

Dang 26psi is alot, and thats werid how you said it worked better

brandonppr

iTrader: (9)

I had absolutely no spin and it pulled the front wheels every run.

omar_286961

iTrader: (4)

Its true every car is different, maybe the track prep had a big roll in this, go on a night when you know the prep is going to be different and try it out again and see what results you get, congrats on a consistant setup.

brandonppr

iTrader: (9)

I plan on going every tuesday till the season ends. I think its over on November 8th. I haven't been able to go this year until the past 2 weeks. Sucks the season is almost over here.

brandonppr

iTrader: (9)

Went again last night. I decided to try a little higher tonight.
The car ran great and hooked perfect every run.

28PSI

L 1.533 4.611 7.223
R 1.533 4.611 7.226
L 1.537 4.622 7.244
R 1.544 4.623 7.235
L 1.534 4.610 7.213
L 1.542 4.625 on brakes elimination round
L 1.535 4.609 on brakes elim
R 1.542 4.623 on brakes elim
R 1.539 4.613 on brakes elim
R 1.545 4.618 on brakes elim
R 1.540 4.612 7.211
R 1.538 4.613 on brakes elim
R 1.536 4.614 on brakes elim

bonestock_442

iTrader: (1)

Impressive I usually run under 15 psi.