Hi,
As far as I know, there is no crank mods needed for the T5 conversion. It
looks like they supply an alternate pilot bushing for the kit.
You can read the installation instructions at:
www.dupontmachining.com
The neat thing about the T5 conversions is that the shifter location is
aligned with the center of the case, so with the adapter included in the
kit, you can locate the shift nob to very near the "proper" location of
the stock shifter.
The "bad" thing is that a lot of the gear ratios are too production-like
and therefore probably not suitable for a race car. There are aftermarket
T5's with different gear ratios, though and some of these would be
suitable for racing.
But, despite what SVRA allows, SCCA (where Rob runs, mostly) does NOT
allow overdrive on alternate transmissions for the TR6 (and the TR3 and 4,
for that matter). Tranny output must be 1:1 except for cars with the stock
Laycock overdrive.
So, there are options out there, but for racing use and for strict
legality, the options are a bit more limited.
For a high HP TR6, a 4-speed, close ratio box with a 3.70 or 3.45 rear end
is probably the place where you want to be or with a 4.10 for hillclims
and short tracks.
Just sayin.
rml
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Bob Lang Triumph TR6!! | This space for rent
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