Theoretical top speeds vs real data?

[RobC]

After all this talk of bigger sprockets I got my excel spreadsheet out and started working out the final diff ratios of the various sprockets and the theoretical top speeds of the car (taking drag etc out of the equation) Do any of you guys run dataloggers? wonder if you can confirm my calculations are about right. Note that this is based on clubsport wheels/tyres with a rolling radius of 5.83 feet.

http://mtcracing.co.uk/Radical_Diff_R

[tonyf]

Hi Rob, I have run a datalogger on both the ZZR and the Busa and would say that you are about bang on with your workings out.
Tony.

[RobC]

Thanks Tony

[simon t]

HI ROb,

This is great, whar rolling circumference did you assume for the tyres?

Simon

[RobC]

Circumference of the tyre is 70" (5.83feet) This doesn't take into account tyre deformation at high speed of course. And I am sure the Prosport radials are slightly taller than the Clubsport crossplys.

[Kieran_A]

what data logging system did you use for this ??

[tonyf]

Pi system 1