Tire Pressure Recommendation

[Grey 65]

Originally Posted by Morris

When I use to do Goodyear test on SS cars with Radials and Bias Ply tires....20#-25# is to low for street driven tires.... when we ran SSA and SSGT for any length of time we would set tires at about 40# and go from there.... by chalking the corner of the tire from the tread to the sidewall and then see how much chalk would come off in the particular test we were doing would tell the most info....... most tire pressures are at around 40#-45#psi. to prevent the tire from rolling off of the rim... ....

Strange, the recommended pressure on my truck are only 39psi and I think it weighs a good 3,000lbs more than my Cobra.. Oh, we use infrared heat guns these days...

Originally Posted by Morris

So for Daily driving you can back the pressure down 10%-20% for a average ride ... but the minute you start getting on the car.... then it needs to come up quickly and you can't do it with any driving on the street.

So if you use 25# expect the tire to roll off the rim in aggressive driving....

That is hilarious, I can guarantee you that there is one other person on Club Cobra who car pulls as many G's as mine does and I run between 19-23psi front and 18-22psi rear on 200 treadwear tires and I've yet to have one come off the rim...

[Morris]

Originally Posted by Grey 65

Strange, the recommended pressure on my truck are only 39psi and I think it weighs a good 3,000lbs more than my Cobra.. Oh, we use infrared heat guns these days...[/IMG]

And you my friend are not driving aggressive enough to come close to rolling a tire off of a rim.....if you are running pressure that low ....it would take at least 2 laps to get enough pressure to help the tire from rolling over on it's side wall... then maybe the tire will come up to running pressure of 30#lbs....

And using a Infrared temp gauge is the worst tool you can use to measure tire Temps with .... you have to get down into the rubber to know what is going on in the tire.... Our Tire Temps are 200*degrees to 215*degrees across the tire. and thats with a pressure of 30#lbs Hot inflation.

[Morris]

Originally Posted by Grey 65

That is hilarious, I can guarantee you that there is one other person on Club Cobra who car pulls as many G's as mine does and I run between 19-23psi front and 18-22psi rear on 200 treadwear tires and I've yet to have one come off the rim...

I'm not sure what kind of racing you are doing .... but unless you are on the Real Race tracks like Road America, Road Atlanta or Mid-Ohio you won't last long using those Pressures.... At speeds of 186mph and running the Carousels at those tracks when you are in a turn for a long period of time.... You better have your pressures right or you will drive right off the track at speed..... or be a moving Pylon....

By the way there are some Cobra's out there that are way faster then yours and have many more years of experience

I'd be happy to meet at any track and help you go faster then you ever gone before.