air pressure in rear slicks

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air pressure in rear slicks

Postby chevy art » Thu Jul 01, 2010 11:48 pm

i run goodyear slicks on my 67 nova. they are 31x14x15/ i use tubes in them and they are pinned. i usually run around 11 to 11 1/2 lbs air in them. one time i ran 10 1/2 lbs of air and the car felt a little shakey before the eigth mile and i dont remember on top end by quarter if i had made the complete pass or let off. how muck lower (than 11 lbs) could i go with air pressure. any real time experience out there with this important question thanks art
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Re: air pressure in rear slicks

Postby Ishiftem » Fri Jul 02, 2010 1:49 am

I knew a guy with a top alcohol dragster and they ran 4.5 pounds. Probably doesn't relate to a heavier door car, just throwing it out there. A lot of people are switching to radials because they are more stable on the big end.
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Re: air pressure in rear slicks

Postby cosvega76 » Fri Jul 02, 2010 10:15 am

A friend of mine used to run a '64 Nova with 30x14 slicks running low 10s. He would run between 4.5 and 6 psi in them. He ran both Goodyears and Hoosiers. He liked the Hoosiers better. This was almost 20 years ago ( :shock: ) now.

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Re: air pressure in rear slicks

Postby spencerforhire » Fri Jul 02, 2010 11:22 am

Drag slick air pressure is usually a compromise between maximum contact patch and top end "wobbles". This would indicate that those among us with large gonads might get away with less pressure :wink:
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....

Visit http://www.spencerforhire.ca
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Re: air pressure in rear slicks

Postby chevy art » Fri Jul 02, 2010 6:58 pm

thanks guys i may try 10 1/2 lbbs, maybe even 10 lbs next week and see what happens, maybe its like going swimming or ice sh=kating for the first time you are real scarred and then you wonder why you didnt do it sooner.ill let you all know if i survive the day art.. spence how far are you from say caribou maine. just curious art
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Re: air pressure in rear slicks

Postby spencerforhire » Fri Jul 02, 2010 9:05 pm

Art- I've actually been to Caribou Maine! It's about a 6.5 hour drive from Halifax. Back in the 70's I had a girlfriend from Bath New Brunswick, about 25 miles southwest of Caribou; that place is waaaay out in the "boonies"!
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....

Visit http://www.spencerforhire.ca
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Re: air pressure in rear slicks

Postby chevy art » Sat Jul 03, 2010 1:32 am

spence i was at loring air base from 1964-1966.. i going up that way this summer for a visit. any drag strips up that way art
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Re: air pressure in rear slicks

Postby tzoom » Sat Jul 03, 2010 7:58 am

The Loring Timing Association is using the old base for land speed racing http://www.lta-lsr.com/HOME.htm. They have an event the weekend of July 31/August 1.
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Re: air pressure in rear slicks

Postby Rickracer » Sat Jul 03, 2010 10:02 am

Got 9x28 Hoosiers on 15x7(?) S10 4x4 wheels, I run 10 psi cold, and I believe I'm right at the low limit. A wider wheel and tire, especially a tire and wheel that's closely matched as far as width, will work on considerably lower pressure though. I've run as low as 8 psi on McCreary GT series dirt tires on the street. :wink: 8)
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Re: air pressure in rear slicks

Postby spencerforhire » Sat Jul 03, 2010 10:54 am

Art- The Dragstrip in Mirimachi N.B. runs every couple of weeks and is only about 2.5 hours(150 miles) due east from Caribou. Here's a link to their website/schedule- http://www.miramichidragway.com/schedule.html
look in the schedule for an "ADRA" event; there will be cars from all over Atlantic Cananda there chasing points.
If you want to drive a bit further, here's the schedule for all the ADRA tracks- http://www.maritimedragracing.com/id19.htm
Some of these other tracks are quite far from Northern Maine; The next closest one in Prince Edward Island is easily 5-6 hours away.
I'm pretty lucky in that I'm less than 2 hours from my closest track in Greenfield Nova Scotia, and my cottage at the other end of the province is only a half an hour from Cape Breton Dragway.
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....

Visit http://www.spencerforhire.ca
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