Speedsix diff ??????????

[Speed eight]

Hello new hear.
This is my question. The rear end, BTR Automotive unit, in my Speed six Tuscan...Is this unit as is or with other ratios fitted to other vehicles,apart from only TVR, if so could you please tell me what vehicles and if known what other ratios.
Thank you.

[jellison]

Not sure what ratio's availible but must be different Crown Wheel and Pinion ratios from say Griff / Chim, through Cerbs to SP6 cars. As RV8's rev alot low (as much as 1500rpm).

But I could be wrong as the extra top end of a CErb or Sp6 car could just be from having the same final drive (cheaper this way for TVR!) and just driving it on for that extra 1000 - 1500rpm more - hence higher top end 167 in Chim500 vs 180+ in Cerb / Tuscan.

Mine is 3.45. Could be that with larger wheels and extra revs this is the only ratio used? Not sure - but some food for thought!

[Speed eight]

Thank you for the information.
I have built 3.4 and 3.2:1 ratios into my Tuscan slip diff....what I really want to know is....is this unit as used in the speed six, that is the "casing" used in other cars, ie Morgan or whatever, and if so what are the ratios?