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Ron Gusack 08-17-2011 05:47 PM

Tire pressure
 
The shot below is at MIR with 9.5 pounds in a 32x14 on a 13" rim. I'm not sure exactly how far off the line it is, but I'd say at least 15-20 feet. Judging by the wrinkles, I think I need way more pressure. What should the tire look like this far out? Thanks for your help.[IMG]http://i246.photobucket.com/albums/g...IRRearTire.jpg[/IMG]

jmcarter 08-17-2011 06:36 PM

Re: Tire pressure
 
From the angle I can't tell how much roll you've got, any idea how much more loaded the Right side is? Also, car weighs about how much and how is it set up? 9.5 lbs sounds like plenty to me so other variables may be in play...

Ron Gusack 08-17-2011 08:36 PM

Re: Tire pressure
 
Quote:

Originally Posted by jmcarter (Post 276050)
From the angle I can't tell how much roll you've got, any idea how much more loaded the Right side is? Also, car weighs about how much and how is it set up? 9.5 lbs sounds like plenty to me so other variables may be in play...

Car weighs 2800 with 1220 in the rear. I've never scaled the car with individual scales. It's got a mono leaf with sliders and ladder bars that I pre load the right bar until it leaves straight. The back of the car is too high and I'm working on that. Here's a video of the car last Saturday. I know the burnout was too long.
http://www.youtube.com/watch?v=SXGT-tCz8tU

Michael Beard 08-17-2011 08:50 PM

Re: Tire pressure
 
Decals look nice on the car. :)

Doesn't matter what the tire looks like. Keep raising the tire pressure until it spins, then back it off. Run as much as you can get away with consistently. The car will work better on both ends of the race track, and you won't wear out the sidewalls on the tire so quickly.

Ron Gusack 08-17-2011 09:33 PM

Re: Tire pressure
 
Quote:

Originally Posted by Michael Beard (Post 276083)
Decals look nice on the car. :)

Doesn't matter what the tire looks like. Keep raising the tire pressure until it spins, then back it off. Run as much as you can get away with consistently. The car will work better on both ends of the race track, and you won't wear out the sidewalls on the tire so quickly.

Thanks Michael, I'm happy with the way they turned out. I have a few tiny air bubbles that seem to appear when it's really hot out. The company that prints them should spend an extra dollar and use a larger box instead of folding the decal. I'm trying to come up with a way to mount the vinyl from the inside to protect it when cleaning the lexan.

At MIR I think I could have run much more air and still hooked. I adjusted the shocks up a click, but never tried more air. Thanks for your input. Should I go up 1/2 lb at a time?

Michael Beard 08-17-2011 10:50 PM

Re: Tire pressure
 
Throw 11-12psi in them and see if it sticks! Then baby steps.

Agree on the shipping boxes... sorry about that. I get them started, then pull taunt and squeegee. Typically, any small bubbles will disappear over time when exposed to the sun. Vinyl is somewhat permeable, and it'll 'suck fast' to the window. They are laminated, so they'll last.

Jim Wahl 08-18-2011 02:22 AM

Re: Tire pressure
 
Stick a pin in the air bubble making an itty bitty pinhole and push the air out working it toward the pin hole. Works great for all sizes of bubbles. Jim:D

Ron Gusack 08-18-2011 07:37 AM

Re: Tire pressure
 
Quote:

Originally Posted by Jim Wahl (Post 276132)
Stick a pin in the air bubble making an itty bitty pinhole and push the air out working it toward the pin hole. Works great for all sizes of bubbles. Jim:D

I thought about that Jim, but I thought rain/stuff would get in the little pin hole and eventually make things worse.


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