----- Original Message -----
From: Michael Hargreave Mawson <[EMAIL PROTECTED]>
>
> Given that it is not possible to put GT6 gearwheels into a Spitfire
> gearbox, is there any easy way to tell what gearbox I have from a quick
> visual inspection? Is there a number stamped anywhere??
Hi Mike,
That's not exactly what I said. It is possible to have a complete GT6 gearset in
there - there are companies which specialise in fitting close ratio gear sets, it's
just not a simple matter of swapping out a gear. Ultimately, whatever gear set you
have is irrelevant - direct 4th gear will always be 1:1. There is usually a number
stamped on the gearbox. On the 3 rails it's on the top face of the main case, to the
right of the shift housing. I think the number is similarly placed on the single rail
box, but it's some time since I've played with one and there isn't one to hand to
check.
Regarding speedo accuracy, how do you know that your rev counter is accurate? I
assume it's an electric type rather than mechanical on a late Spitfire - this should
be more believable (the mechanical ones suffer the same problems as speedos), but by
no means infallible. Also, why do you believe the Mazda is accurate? Our 9 year old VW
Passatt is pretty optimistic and always was when it was a much younger car in my
father-in-law's ownership. There are certainly too many variables to start pulling
things apart - only calibrate against known measurrements. At the moment both of your
calibration benchmarks are unknown variables, not a good starting point,
Cheers,
Bill.
--
Rarebits4classics
.......just what you've been looking for
PO Box 1232
Calne
Wiltshire
SN11 8WA
United Kingdom
http://www.rarebits4classics.co.uk
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