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The mkiv Supra Owners Club

Top Speed Runs - Tyre Pressures


Sharpie

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Looks reasonable.

I run 36 all around to accomodate the odd trip to the limiter.

If I were to take it to Germany for some top speed runs with the TRAC fuse off then it would be 40psi all around for me.

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If you look on the sidewalls you'll see a maximum recommended (hot) inflation pressure, the tyres should give the lowest drag at that pressure, although grip may be compromised. Serious top speed runs are often made with a lot more than the recommended pressures, again to reduce tyre drag, which can be very significant. But these people also suffer tyre failures from time to time...

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I was watching a top speed shoot out in the US. They ran stock/high psi up front and a couple of PSI lower in the rears, this was for a standing mile competition.

 

The Hennesy Viper won with a top speed of 217mph in the standing mile! :eek:

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