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-   -   recomended presures in radial slicks (https://classracer.com/classforum/showthread.php?t=18514)

gmonde 06-18-2009 07:31 PM

recomended presures in radial slicks
 
there seams to be no recomended presures for the radial slicks,i have a new set of hoosiers 9x30r car weighs 3665 with the driver ,,,,i run 16 psi in the bias ply 29.5 x 9 with good results just looking for some comparison with simular weight cars gmonde

Curt Rees 06-18-2009 07:42 PM

Re: recomended presures in radial slicks
 
18 pounds at 3400.

#5457

Curt Rees

Myron Piatek 06-18-2009 08:14 PM

Re: recomended presures in radial slicks
 
Lots of variables, including car weight, weight transfer, suspension hit, rim width, etc.
I have the Hoosier 9" lightweight radials on 10" rims, car weighs 3,540lbs + and I footbrake. I've been running 21 lbs. of air. It's been a while since I ran the car over 3,700 lbs, but I don't recall changing the pressure then.

Ron Zenzen 5402 06-18-2009 08:15 PM

Re: recomended presures in radial slicks
 
Our Deal, 22 PSI

nwebber 06-18-2009 08:20 PM

Re: recomended presures in radial slicks
 
I run a 3600 pound wagon with a 305 and can run up to 35 pounds without any issue.

Norm Webber
LSA 6635

George Mirza 06-18-2009 08:36 PM

Re: recomended presures in radial slicks
 
Start at 20lbs and go up from there. Talk with some of the guys running coil spring cars, they can tell you what will work.

See you at LV
George

Jim Wahl 06-18-2009 09:30 PM

Re: recomended presures in radial slicks
 
I have been running 22lbs. with 30X9 Hoosier light weight radials in a 3500lb. Stocker with CalTrac leaf suspension. Jim

Ian Hill 06-19-2009 05:12 AM

Re: recomended presures in radial slicks
 
3560# chevelle, 25.5 pounds on an 8 inch rim

Ian

rallye bob 06-19-2009 05:14 AM

Re: recomended presures in radial slicks
 
I agree. 30X9 Hoosier (CO7) radials 19-22 lb 3500 lb foot brake. Depends on track

1320racer 06-19-2009 07:58 AM

Re: recomended presures in radial slicks
 
Been running Hoosier's 30 x 10.5 radial slick on my nose heavy 3880 lb. BB Chevelle since the 2000 season using 3 pairs a season, pulling them off at 75 passes and typically aired to 18 psi.

Have gone 100+ passes on a set and I've run them with as much as 20 psi.

Have gone a best of 1.28 60 foot and 1.36 60 foot breaking the beam with the back tires.

http://i381.photobucket.com/albums/o...own6-15-08.jpg

http://www.youtube.com/watch?v=rbKYio6OvKM

http://i381.photobucket.com/albums/o...0002-1-2-1.jpg

My rule of thumb is to start at 5 psi more than what you ran with bias slicks.

gmonde 06-19-2009 07:50 PM

Re: recomended presures in radial slicks
 
thanks for the advice ,,getting ready for the divisonal at lebannon valley see you there thanks gmonde

ss wannabee 06-23-2009 08:16 AM

Re: recomended presures in radial slicks
 
You guys make an "adjustment" when the air become hot and soupy like in summer?

Marvin Robinson 06-23-2009 11:30 PM

Re: recomended presures in radial slicks
 
I'm running the liteweight Hoosiers, 92.5 X 9.00 hard compound @ 21psi on F/SA 71 Olds 442. I have 20 psi in rt airbag, 5 psi in left. Seems to hook OK, but I'm working on the power end of the equation right now.

I would like to know what you have for the A-Arms and links in the front suspension, I need my fronts to hang straight like yours, not splayed from camber change.

Thanx,

Starvin Marvin 3188

Bob Bender 06-24-2009 10:58 AM

Re: recomended presures in radial slicks
 
36 PSI in my 4400 lb. stocker

treessavoy 06-24-2009 04:02 PM

Re: recomended presures in radial slicks
 
I bought my 9" radials from Hoosier at the track and their rep's said to start at 21lbs for my 3450lb Ply.

Footbrake 06-28-2009 04:03 AM

Re: recomended presures in radial slicks
 
Not radials but maybe you guys can help me out here. I run 26x10 Hoosier slicks. I had my 7" cutlass rallys widened to 9" for a better footprint. Now I don't know where to go as far as air pressure. My 9" slicks on 7" rims liked about 18lbs, but these don't. It hooks the best at about 12.5 lbs. Am I going in the right direction or should I try a lot more air in these slicks? Car with me in it is 3960lbs.


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