Thanks for the information and advice Randall. Highly appreciated.
Chris de Wet .
" South African home for unwanted and neglected Triumph cars and parts " :-)
PO Box 472 , Ifafi , 0260 , South Africa .
'56 TR 3, '62 Herald 1200 Coupe, '64 Spitfire 4 (Mk1), '65 Spitfire 4 (Mk2),
'67 GT6 (Mk1).
'63 Vitesse 1600 Convertible (HB 8346 CV) ....... possibly soon?
My Spitfire6 project: Spitfire(Mk2) body, GT6(Mk1) bonnet & doors, GT6(Mk1)
chassis/brakes/suspension, GT 6 (Mk 1) engine, 2000 Saloon gearbox with
overdrive and Vitesse 3.89 differential.
-----Original Message-----
From: Randall Young [mailto:Ryoung@navcomtech.com]
Sent: Tuesday, 04 November, 2003 10:26
To: triumphs@autox.team.net
Subject: RE: Looking for A-Type OD and Transmission
> can the 1600 Vitesse 6 (Sports 6) non-o/d mainshaft be replaced with the
o/d mainshaft and
> d-type overdrive from a Spitfire Mk1 -Mk3 o/d gearbox ?
Yes, in fact we saw a demonstration at VTR this year of John Kipping doing
this exact conversion.
> Might be possible to use the Vitesse 1600 gearbox in the Spitfire4 (aka
Mk1). I know the bellhousing must be changed to the Spitfire type. Anything
else ?
The input shaft is considerably different but I forget offhand which one is
longer.
> Not sure how the Vitesse ratios will affect power, speed and fuel
consumption of the early Spitfire. Anyone any ideas?
Fuel consumption shouldn't be an issue, since 4th gear is direct drive on
both gearboxes.
Close ratios are normally only an advantage on 'peaky' engines, those where
the power output falls off rapidly either side of the peak power point. How
that relates to Spitfire vs Vitesse, I don't know. The downside to close
ratios is that 1st gear is taller, which can hurt performance off the line
and lead to rapid clutch wear.
Randall
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