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That's indicated speed though, strap on a GPS and the car won't be doing 200mph?
 

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I ran a Vbox on my last track day (Silverstone UK), at the end of Hangar Straight indicated speed was 155mph and Vbox showed 147mph. So 204mph indicated would be maximum 196mph, which happens to be the factory listed top speed
 

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Discussion Starter · #8 ·
I ran a Vbox on my last track day (Silverstone UK), at the end of Hangar Straight indicated speed was 155mph and Vbox showed 147mph. So 204mph indicated would be maximum 196mph, which happens to be the factory listed top speed
Not so fast! Tire size is uknown in our case. Speedometer assumes that stock size tires are being used.... If you change that, you change everything.
 

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Not so fast! Tire size is uknown in our case. Speedometer assumes that stock size tires are being used.... If you change that, you change everything.
Then you should have stated the assumption that he's running different size tyres. I'll make the assumption he's running stock tyres and somwhere around the 196mph mark
 

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He's in a hurry to get to the gas station
 
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