I bought a set of Mickey Thompson ET Streets with tubes. They will only be used at the track. What's a good air pressure to start with?

I use the MT ET streets w/o the tubes. 28 x 11.5 x 15. I run about 16 psi, stick shift car, air bag in the right rear spring at 12psi.

Mike,
We've found on Dana's car that 17lbs works best...28x10x15 ET Streets on 8" wheels with no tubes. Runs airbags too.
BTW, he ran 1.80 60fts with 13.30s recently at Silver Dollar.
Gear change done yet?

Remember to experiment and add pressure until it doesn't hook.

Definetly a function of the variables of each particular car. Mine being heavy and lifting the front wheels, the sidewalls didn't like 16 to 17 they were really distorting, 20 psi gave me the quickest ET and mph and 60 ft. I use Hoosiers but the same applies to the MT's.

For yours, could be anywhere from 15 to 20, I like 16 to 17 to start like others have said.

Originally posted by BillsCamino:
Mike,
We've found on Dana's car that 17lbs works best...28x10x15 ET Streets on 8" wheels with no tubes. Runs airbags too.
BTW, he ran 1.80 60fts with 13.30s recently at Silver Dollar.
Gear change done yet? Wow, Dana's car is running good! I just dropped my 12-bolt housing off to Ed yesterday. I'm supposed to have it back ready to go in two weeks. I'm targeting March 12 as my first race this year.

Mike

I run a set of MT/ET 26x10.5 at 18.5 psi. Seems to hook pretty good and feels good at the top end.

David

Hey, how do you guys think the et streets hook compared to straight drag slicks?

Just a safety note since people tend not to read directions. If you run a tube in a slick at very low pressure there is a chance the tire may slip on the rim and tear the valve stem - with an instant loss of tire pressue. This is why people use rim screws on slicks when using tubes. What is very low pressure will vary according to car weight. Very generally that would be less than 13/15 psi. You can run tubless with slicks at very low pressures and not use rim screws - but then another safety issue arises: if you get out of shape at speed on the top end you can pull the tire bead away from the rim enough to "burp" out most all remaining tire pressure. Mind you it doesn't happen often, but it does happen: within the last two years on the CorvetteForum there was a very low 10/high 9 second Corvette that was completely totaled with a top end loss of tire pressure. No rim screws, tubeless, and ~ 10 psi if I remember correctly. I've heard of others.

Be safe, slicks make launches so much fun!

Thomas

Originally posted by Georgia69:
I'm targeting March 12 as my first race this year. Where?
Also, are you doing a NASCAR weekend with your Dad starting on the 18th?
We'll be there for qualifing/truck race on Friday.

I wrecked My corvette About two years ago at the top end. I believe rims screws are what saved me from flipping my car I did post a video at the time. It was a very scary ride. I ran a low 7 sec. 1/8mi going side ways thru the traps

Mike

Guys, thanks for the tips.

Bill, I was planning on Commerce March 12, but I drove the car to work today and the transmission is acting up. I'm pretty disgusted. This could be another delay. I'll call you when I get a chance.