3.6 conversion- top speed with stock 915??

[mmasse]

I wonder what should be the top speed of my 1976 S with a 3.6 Vario engine.

I have a stock 915 on it.

How would the change of wheels/tires affect the reading on the speedometer? I have 295/35-18 in the rear and 225/40-18 on the front.

I am getting top speed reading of 130 miles, which seems kind of low, and I feel that I am going faster than that.

Thanks

[k9handler]

it should be as my GPS had registered 155 while the speedo was past the 150 mark...this is redline in 5th. 18" wheels should get you even better than that.

[IROC]

I did some guessing from memory here, but at 6500rpm, you should have been going around 159 or so in 5th. I guessed at the 5th gear ratio (isn't it .82 for a '76 915?). I also used 26.13 for the diameter of your tires, but the actual rolling diameter might be a little less (leading a slower speed).

Mike

[Bill Verburg]

These figures are good approximations for a 915/44