Brad,
Anyone please correct me if I am wrong here.....
To my knowledge, crankshaft wise, there are 4 engines... all 1147s' use
the same crankshaft.... early 1296 uses the same 1147 crank as far as
journal size (I think they may have beefed up the throws a bit).. this is
what is commonly known as the small journal crank.
Late 1296 uses a larger diameter main journal and rod journal (large journal
crank) and is a bit heavier still. The 1500 continues with the large 1296
journal, but the crank is stroked around a1/4"....
Warning, the 1500 crank will NOT fit a 1296 block, the stroke is too long
& it will hit the side of the block.
Bottom line, there are two sets of bearings & thrust washers....
1147/1296, and 1296/1500.
I believe the 1147 crank will be the lightest, & spin up the quickest,
(IMHO making it the best for racing). Get a good balance on it & try not to
use it for engine braking any more than necessary, as it is also the
weakest.
Hope some of this helps.
Tom Strange
#4 White
72 Spitfire 1296
----- Original Message -----
From: "Brad Kahler" <brad.kahler@141.com>
To: <fot@autox.team.net>
Sent: Friday, August 29, 2003 9:31 PM
Subject: spit crankshafts
> Amici,
>
> Somewhere I thought I read that the 1147 spitfire crankshafts are
> the same as the 1300 crankshafts. Unfortunately I can't find where I
> might have read that.
>
> Can anyone confirm or deny that rumor?!
>
> Thanks
>
> Brad
> 1957 TR3 vintage racer
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