Radial tire chatter

[Todd Geisler]

Originally Posted by Floyd Staggs

Todd, the backend is already stiff with 250 lb springs but I do have the shocks set soft. Like I said, I started at 15lbs, dropped to 14 1/2 in the cool weather and was doing great. 1:452, 1:453, 1:452 60 fts. 2 weeks later it got hot and first I lowered the pressure to 14 then I raised it to 16. The last pass I eased it out trying to win the race and broke out by .005 so I didn't really get to try the highr pressure.
Thanks for the response.

That's the same size tire I run. I've run the BFG's, M/T's, now the Hoosiers. All have worked with 18 psi cold, as high as 19.5 psi hot. Typical usable range for me is 16 to 18 psi. I can't remember ever going to 15 psi.

I run 120 #/in rate coil springs out back (stock type coils) and double adjustable shocks. You need the firmness to come from the shock valving (control), not so much the springs themselves.

My car has 60's a best of 1.289 footbraking, mid 9 second naturally aspirated 454 bbc, th400, 6000 flash 8" converter, th400, 4.33 gear.

Hot & greasy tracks are a big challenge for the radial tires. For this reason, I now have a second set of rims with a pair of 10.5 x 28 Hoosier stiff sidewall slicks for when conditions are at their worst.

hth
Todd