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Rob, by breathing the tires on the banking I would guess letting the car run higher up, larger radius which will allow less steering angle?
Yep that's one way to do it, stay off the bottom
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Rob, by breathing the tires on the banking I would guess letting the car run higher up, larger radius which will allow less steering angle?
Yes, I had a rotisserie I made back in the day. I could rotate 4 mounted tires at a time and the sun would reflect in the mirrored surface beneath it with 50 psi in the tires in the hot Sacramento summer sun. It worked like gangbusters, I could stretch the crap out of them....until after a couple heat cycles when they all normalized and went back to their original size-or close to it. That's when I started using air in the right rear (nitrogen in the rest) so as the tire temps climbed I would get more and more stagger. This worked awesome. No idea what they are doing these days. We all ran spools and bias plys, now they are on radials and there's all these fancy differentials....maybe stagger is a thing of the past?While we're here. let's talk about "stagger" for a moment.
Back in the day when everyone had to run bias tires, there was a fairly large discrepancy in tire diameter, for this reason teams used to dig through the tire trailer and try to find tires with close to the same manufacture date in an attempt to gain some consistency. These days, even the manufacturers of bias ply short track tires, are pretty consistent, so much so that you can basically order your stagger, they make tires in like 1/2 inch increments so you can buy what you need. With radials, and I must have measured a million of them, the biggest difference in the same size tire was maybe 1/8 of an inch. So the concept of stagger, while valid, doesn't really apply to road race radial tires. The only way to provide for tire stagger would be to purchase different size tires, that is now illegal in IMSA and besides the fact that you won't get anywhere doing that on a road course, the tire sizes are so different, that you end up with all kinds of mismatched, crazy sizes that you can't tune to.
The idea of overinflating a tire and throwing it on top of the transporter to get the sun to "grow" it. also doesn't work, the radials simply don't grow anymore.
Sprinters on asphalt are awesome....but my favorites are the super modifieds....when they aren't crashing.not for everybody.. lol
there's Tampa Bay Racing Association that runs these on 1/4 mile tracks down here
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I run the slick, not the A/R7. As far as the A7s when I ran Time Attack, we ran within a psi of the racing slick.Great info Brian, but could you clarify if you are discussing the pure Hoosier racing slick or the DOT Hoosier A7 or R7? I have a friend who runs a Viper ACR and like your example he starts way down there on his pure Hoosier slicks , but when he runs A7s he starts at a higher initial temp. I know I usually started around 24-25 with R7s and they would end up around 34-36 at the end of a race, but I have never run on Hoosier racing slicks. I have run Michelin slicks on a Viper and started them around 24 , so this info on the Hoosiers is valuable, since many of us are running them or have run them in DOT Comp form. Thanks.