NigelJ Posted April 26, 2005 Share Posted April 26, 2005 Does anyone have an acccurate ratio chart showing speed Vs rpm for each gear in my 6 speed SLR? The reason for asking is that my speedo seems to be "rather optimistic" and sometines it is actually useful to know just how quick I am going Thanks NigelJ Link to comment Share on other sites More sharing options...
Myles Posted April 26, 2005 Share Posted April 26, 2005 What tyres/wheels are you running....???? Project Scope-Creep is live... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Paul Deslandes Posted April 26, 2005 Share Posted April 26, 2005 Try downloading this calculator from Quaife. You'll need to know your rear tyre rolling circumference, which you can measure by rolling the car along the ground a couple of wheel revs, and the gear and final drive ratios. Just plug in the numbers and go. It also does a rather nice rev/gear change up plot. http://www.quaife.co.uk/downloads/QSpeedCalc.exe Link to comment Share on other sites More sharing options...
NigelJ Posted April 27, 2005 Author Share Posted April 27, 2005 Thanks for the info Paul - a very useful bit of software from Mr Quaife Interestingly my speedo is not in fact that far out - maybe 5MPH tops. Must mean I've been going rather quicker than I believed Thanks again NigelJ Link to comment Share on other sites More sharing options...
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