Drag Radial Pressure

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sc racing · #1 Post by **sc racing** » Tue Apr 22, 2008 9:15 pm

Im going to the track with my street car and it has drag radials 315/35/17 any idea on a good starting point for pressure?

Bob West · #2 Post by **Bob West** » Tue Apr 22, 2008 9:35 pm

I always ran 17-18psi, I'd start about 15 and go up til it spins.

DL · #3 Post by DL » Wed Apr 23, 2008 6:41 am

i run a 315 60 on ten inch (mickeythompson) i run 14 psi stay out of the water box also let us know how it works see ya daniel

a1elec · #4 Post by **a1elec** » Wed Apr 23, 2008 3:14 pm

hey dl do you back up to the water box with small burnout?

sc racing · #5 Post by **sc racing** » Wed Apr 23, 2008 8:31 pm

The 315/35's are a really low profile so Im thinking I should start the pressure on the high side maybe around 18 or so.I actually want it to spin 1 or 2 revolutions just to be safe and not brake the rear its only a 7.5 10 bolt in a 3600+lb car.

Bob West · #6 Post by **Bob West** » Wed Apr 23, 2008 9:54 pm

7.5 10 bolt in a 3600+lb car.

You better crawl under there and kiss it goodbye now!!!

68 Camaro · #7 Post by **68 Camaro** » Thu Apr 24, 2008 8:29 pm

I've been running a 8.5 10 bolt with 10.5 drag radials in a 3250lb car/driver. Not much better in stock form, but weld the tubes, gusset the perches, and put a girdle on it. It should live (Mine has lived for 10years with the last 4 on drag radials). I run my ET streets at 18psi and pull the front end 4" for a foot or two (no trans brake or line lock). Not the quickest car, but it runs low 12's.

sc racing · #8 Post by **sc racing** » Thu Apr 24, 2008 9:17 pm

Its got a girdle on it but I need to sell the car so Im going to make sure it spins a little.The motor makes about 500ft lbs of torque so Im a little worried but Ill see what happens in a few weeks.

bluestreak · #9 Post by **bluestreak** » Thu Apr 24, 2008 11:32 pm

Bob West wrote:
7.5 10 bolt in a 3600+lb car.
You better crawl under there and kiss it goodbye now!!!

that was funny

as hell....
i have the 8.5 w/good axles and cover welded up like 68camaro
wore out the aubern after 3yrs (lot of street driving)rnrd it 2more
yrs, sec. fstr, started "unlocking" couple of weeks later she ExPlOdEd
lol. we'l see how this one lasts ...that commint was still funny

rustbucket · #10 Post by **rustbucket** » Fri Apr 25, 2008 4:05 pm

i used a 8.5 10 bolt for 2 years and recently upgraded to a 9 inch ford. Blew it out on the 2nd pass. just my luck

79 Camaro · #11 Post by **79 Camaro** » Fri Apr 25, 2008 5:34 pm

rustbucket wrote:i used a 8.5 10 bolt for 2 years and recently upgraded to a 9 inch ford. Blew it out on the 2nd pass. just my luck

Was it a stock 9"???

a1elec · #12 Post by **a1elec** » Fri Apr 25, 2008 5:47 pm

any problems with running rear drag radials with standard front tires? on m/t website they caution against it.

rustbucket · #13 Post by **rustbucket** » Fri Apr 25, 2008 6:44 pm

stock carrier with moser and richman stuff.
im having a strange carrier with billet pinion support built now.

79 Camaro · #14 Post by **79 Camaro** » Fri Apr 25, 2008 6:55 pm

rustbucket wrote:stock carrier with moser and richman stuff.
im having a strange carrier with billet pinion support built now.

Thats a good Idea. I hear that the stock carrier wont hold up to alot and you hit it pretty hard with your set up. Nor will the stock pinion supports.
I have a moser 9 inch with all the overkill goods... LOL! I probably couldnt break it in a 100 years with my little wimpy set up.

adam

ytnova · #15 Post by **ytnova** » Sat Apr 26, 2008 12:49 pm

I have used drag radials in the rear with et drags in the front and I had no problems, they felt plenty stable at 150mph+

. I have read the same thing, but I have yet to see a fast drag radial car that doesn't have some sort of light weight bias ply in the front yet, maybe its just for street use and to cover their butt.

Drag Radial Pressure

Drag Radial Pressure

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