whats the best PSI for bias ply ET Streets at the track?

[VanWilder]

Just to clarify I did do a quick search on here and couldnt find the answer I needed.

anyway...I have some 26x11.50-17 Mickey Thompson bias ply ET Streets for the track...what's the best tire pressure to run in them for the best times at the track. Last season I was launching the car around 6k and cutting only 1.75 60s...this year I want to get into the 1.6Xs launching off a 2 step set at I believe 5000 to 5500...what do you guys recommend?!

 

[qwikhuh]

I like to run around 13-14 psi but every car will be different

 

[Boss281]

I ran them last weekend at 15psi, and got 1.588 through 1.66 sixties. The 60ft went down as my launch rpm went up...

 

[VanWilder]

I ran them last weekend at 15psi, and got 1.588 through 1.66 sixties. The 60ft went down as my launch rpm went up...

what was your best launch rpm?!

 

[Boss281]

I THINK 5750--I recall posting here somewhere while it was fresh in my mind. That's still fairly low and some folks launch at 7000.

 

[VanWilder]

I THINK 5750--I recall posting here somewhere while it was fresh in my mind. That's still fairly low and some folks launch at 7000.

I've launched at 6800 before but I still have the factory valve springs and dont wanna float a valve

 

[j-stang]

i have 26x11.5x16's and i'm usually around 15-17psi pending on track conditions.

 

[FordEvangelist]

I'd just start them at 15psi then work up or down from there. Might even start at 16psi.

 

[VanWilder]

thanks for the help guys...I will be trying everything mentioned out...now all I gotta do is get the new clutch broke in and will soon be going for a new PB NA along with my first nitrous runs

 

[firestang70]

As stated before every car is different. With my setup I run 28 by 11.5 by 15. I run 12-15 psi. Any lower than 12 and my car floats all over just a bit much to my liking.

 

[VanWilder]

As stated before every car is different. With my setup I run 28 by 11.5 by 15. I run 12-15 psi. Any lower than 12 and my car floats all over just a bit much to my liking.

Yeah the last time I ran at the track I believe I only had 12lbs in and mine was floating all over the track as well....didnt like it to much...I think I'll try 15 and see what happens

 

[rojizostang]

been running 14.5 and it hooks well

 

[BlownAway05]

Run mine at 14 psi and I float like crazy (trapping 119-121)

 

[Matt D]

I run mine at 9.5-10 psi.... anything more im not going anywhere

that is before the burnout so it goes up a tad after they are warm

 

[ChevyKiller]

The weight of your car - 14.5 psi - period.

 

[VanWilder]

The weight of your car - 14.5 psi - period.

Thanks man!!

 

[xtweakerx]

if I set it to 13psi and i still spin @ launch, should i drop down to 12psi? or go up in PSI?

 

[xtweakerx]

No one can answer the above question?

 

[AlbertD]

Try dropping it to 12, thats what psi I run in my tires and it works awesome for my setup. Also not sure what suspension mods you have, but that may be the cause of your wheel spin as well.

 

[Lurker]

Start with 11-12 PSI. Keep adding half a lbs each run until you get a little slip at launch. That's probably perfect once you get there.