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Old 02-27-2016, 10:37 AM   #17 (permalink)
CapriRacer
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Quote:
Originally Posted by secaturbo View Post
Hey CapriRacer, Do you road race in IT? .......
Back in the early 1990's I did. I had a 1974 Capri with a 2.8L running in ITA. I totaled that car - 2 1/2 rolls that damaged every panel on the car. I replaced that car with the GT3 Capri you see pictured.

Quote:
Originally Posted by secaturbo View Post
........ I used to race a CRX si in SCCA showroom stock class late 80s. Used the Yokohama 008 tire. At a national event a Yokohoma rep said to me on the sly inflate to 45psi cold and run in lap or two come in and tire should be 50-52psi hot.
Side wall i think was 38psi. I did this and handling was much better.
Guy at Jackson Racing confirmed this and he said as high as 55ps hot.

They say this pressure keeps sidewall from deforming at hi cornering speeds. BIR turn 1 was about +110mph.

I run my G1 Insight at 60psi no issues. But just bough new in Oct so I will see how they do and report back.
First, racing is a totally different thing than running on the street. In racing, the tires have to last 10's of miles, not tens of thousands of miles. The difference is where one is on the SN curve. So using very high inflation pressures when racing on street tires is not the same as using that pressure in a racing tire or in a street tire on the street.

And, Yes, I used over 40 psi when I raced in ITA. I did that because I could not get enough camber into the car to keep the tire planted. I also noted that the crisp steering was an asset that help a poor amateur driver do a better job.
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