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jspec & uk diffs


eyefi
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For anyone interested, there was a discussion going on in the 'for sale' section regarding the difference between manual and auto diff ratios on the TT's

 

Ian C and myself have both run our cars at 3000 rpm to find out the actual speed difference between the two diffs. Ian tested his car in 5th which is a 1:1 ratio through the gearbox and I did mine in 3rd, again 1:1 through the auto box. (Both JDM Cars)

 

Manual 6sp @ 3,000 rpm = 66/67 mph.

Auto @ 3,000 rpm = 56/57 mph.

 

Both speed readings are acurate enough. Ian using his Apexi unit and mine was by GPS. Estimated acuracy +/- 1 mph

 

Thanks to Ian for helping me with that and thanks to Eyefi for getting me all fanatical in the first place! :looney:

 

If anyone has a UK TT6 with GPs or similar, Id be interested to know what yours does.

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