SG Door car tire pressures

JMatt · 09-26-2009, 10:47 AM

Just curious where people are finding their best tire pressures. I search, but most threads seem to come from dragsters running 5-6 pounds.

I'm in a 2600 pound door car. Currently 60' in 1.200 seconds. 1.80 glide, 4.30 rear end. 104" rollout rear tires (NOT stiff sidewall).

I run about 9.5 pounds hot. 8.5 cold. +/- based on weather.

Too high? Too low? Just right?

JMatt · 09-26-2009, 03:06 PM

No Super Gas cars on this forum?

GRIGGS · 09-26-2009, 04:58 PM

The more air pressure you can run the better. It will also help your rt. I run anywhere between 10 to 12 lbs. depending on track conditions, but I do run more than most. 3200 lb Chevy II. Hope this helps some.

JMatt · 09-26-2009, 06:05 PM

Quote:

Originally Posted by GRIGGS

The more air pressure you can run the better. It will also help your rt. I run anywhere between 10 to 12 lbs. depending on track conditions, but I do run more than most. 3200 lb Chevy II. Hope this helps some.

Sure that helps. Thanks. Love to hear more people's examples too.

Lou SG2340 · 09-27-2009, 05:30 AM

7lbs on a 2250lb roadster with 33x16 Hoosiers. Same pressure hot or cold

frank v · 09-27-2009, 12:38 PM

i run 8lbs in a 2550 door car hot or cold

JMatt · 09-27-2009, 06:33 PM

Same pressure hot or cold? Don't your cold tires coming off the trailer heat up enough to add a pound from the first burnout?

I'm trying to get to about 9.5 pounds immediately after the burnout. That's why first pass I have set about a pound lower.

Am I doing it wrong?

CH.CRAFT · 09-27-2009, 07:16 PM

Quote:

Originally Posted by indyracer

same pressure hot or cold? Don't your cold tires coming off the trailer heat up enough to add a pound from the first burnout?

I'm trying to get to about 9.5 pounds immediately after the burnout. That's why first pass i have set about a pound lower.

Am i doing it wrong?

my 33.5x15 stiff wall goodyears increase approx. .75 to 1.0 lb. From cold to hot. I run 10.0 lbs. Hot, 3200 lb. Camaro.

roseracing · 09-28-2009, 07:02 AM

We alway run 7.25lbs, hot or cold. 1971 Challenger, 2640lbs w/driver, 33x16 Hoosier tires, runs 155mph.

If you can run more air, still cut a light and not spin - then your better off with more. Our car happens to like it in between 7 & 7.5.

Brad

09-26-2009, 10:47 AM	#1
JMatt Junior Member Join Date: Sep 2009 Posts: 87 Likes: 0 Liked 0 Times in 0 Posts	SG Door car tire pressures Just curious where people are finding their best tire pressures. I search, but most threads seem to come from dragsters running 5-6 pounds. I'm in a 2600 pound door car. Currently 60' in 1.200 seconds. 1.80 glide, 4.30 rear end. 104" rollout rear tires (NOT stiff sidewall). I run about 9.5 pounds hot. 8.5 cold. +/- based on weather. Too high? Too low? Just right?

09-26-2009, 03:06 PM	#2
JMatt Junior Member Join Date: Sep 2009 Posts: 87 Likes: 0 Liked 0 Times in 0 Posts	Re: SG Door car tire pressures No Super Gas cars on this forum?

09-26-2009, 04:58 PM	#3
GRIGGS Junior Member Join Date: May 2008 Posts: 92 Likes: 0 Liked 0 Times in 0 Posts	Re: SG Door car tire pressures The more air pressure you can run the better. It will also help your rt. I run anywhere between 10 to 12 lbs. depending on track conditions, but I do run more than most. 3200 lb Chevy II. Hope this helps some.

09-27-2009, 05:30 AM	#5
Lou SG2340 Member Join Date: May 2008 Location: Disputanta Va (30 minutes from VMP) Posts: 122 Likes: 0 Liked 0 Times in 0 Posts	Re: SG Door car tire pressures 7lbs on a 2250lb roadster with 33x16 Hoosiers. Same pressure hot or cold

09-27-2009, 12:38 PM	#6
frank v Member Join Date: Jul 2005 Location: ny Posts: 286 Likes: 0 Liked 0 Times in 0 Posts	Re: SG Door car tire pressures i run 8lbs in a 2550 door car hot or cold __________________ s/g 1620

09-27-2009, 06:33 PM	#7
JMatt Junior Member Join Date: Sep 2009 Posts: 87 Likes: 0 Liked 0 Times in 0 Posts	Re: SG Door car tire pressures Same pressure hot or cold? Don't your cold tires coming off the trailer heat up enough to add a pound from the first burnout? I'm trying to get to about 9.5 pounds immediately after the burnout. That's why first pass I have set about a pound lower. Am I doing it wrong?

09-28-2009, 07:02 AM	#9
roseracing Member Join Date: May 2009 Location: South Sioux City, NE Posts: 108 Likes: 0 Liked 0 Times in 0 Posts	Re: SG Door car tire pressures We alway run 7.25lbs, hot or cold. 1971 Challenger, 2640lbs w/driver, 33x16 Hoosier tires, runs 155mph. If you can run more air, still cut a light and not spin - then your better off with more. Our car happens to like it in between 7 & 7.5. Brad