I did do some rough calculations a while ago (I was/am thinking the
same for my 1500 non-overdrive model), and determined that the effect
of fitting the 3.27 diff would be similar to fitting an overdrive.
This was comparing the total engine to wheel drive ratios of the two.
(Obviously the diff would be in place in all gears, and the overdrive
is an optional engage on the top 2 so it isnt quite the same!!)
Linus
______________________________ Reply Separator _________________________________
Subject: Re: 3.27 diff
Author: "Michael D. Porter" <mdporter@rt66.com> at mailgate
Date: 96/07/22 8:33
> I'm sorry if this has already been discussed in the thread, but is
> the 3.27 diff interchangable with the others in a Spitfire, I sure
> could use a higher gearing? ( no overdrive :( )
>Peter, I am not positive (been many years since I owned a Spit), but I
don't believe gear sets are interchangeable between GT6 and Spit, but the
entire center sections are. But, it's a reasonable question... why go to
a 3.27:1 in a Spit? The acceleration would be abominable, and if it's a
later Spit, the engine is already so weak, and the torque peak pushed up
from earlier engines that you might never be able to reach it in 3rd or
4th gear. The 3.27:1 was adequate for road use in a GT6, but the
difference in available stock torque from the GT6 engine and the Spit
engine is considerable.
Cheers.
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