In a message dated 95-09-07 07:04:41 EDT, RICHARD.JACKSON@nene.ac.uk (Richard
Jackson - Network Technician ext. 2570) writes:
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>
>Something that sprang to mind here, When the U.S got the 1500 engine they
still
>had single down pipe(like the MK IV), right (? please correct me, or flame
me if you wish)
>so therefore what I am thinking is did they (you) still get the
>chassis cut out as we did to accomodate the extra size of the twin downpipe
>even though they (you) didn't get it, if not, then the chassis will require
a
>bit of chopping about (Did any parts of the US get the twin SU's for that
>matter)
>
>Rich.
>----------------------------
Glad you mentioned this...
I haven't installed the manifold yet, probably won't for some time (I have a
header there now).
So the word is that this manifold is NOT from a Spitfire, but from a
Dolomite??
Or are you saying that it (the 2 outlet mainfold) was on some Spitfires, but
there is a chunk cut out of the frame to let it fit?
You're right, the Mk 4 (IV) Spitfire, 1971-72, has a single downpipe as did
the 1500's (73-74) without the catalytic converter. In 75 the converter was
added along with a chunk missing in the frame for clearance, still a single
pipe.
If I hear you right, the manifold into 2 pipes I'm describing will require a
modification of my frame (since it's a '74) for clearance. I'm not excited
about that.
As far as the 2 carbs go, the Mk3 ('67-69) had dual SU 1.25" carbs. I think
the Mk3 '70 had a single Stromberg as did all cars afterwards. The fellow
selling the 1.5" carb setup and exhaust manifold maintains the non-US
Spitfires had the 2-1.5" SU's and 2 outlet exhaust manifold setup, although I
can't find any evidence in any books I have as yet
Please further enlighten me on this manifold setup!
My 1300 engine in my '74 ex1500 Spitfire (with GT-6 pistons, balanced,
ported, cam, milled head, heavy valve springs, headers, 2-1.25" SU's). was
out of my original '68 Mk3. I almost scrapped it after finding a cylinder
heavily scored by a wristpin without the circlips installed (PO), but found
that a .040" overbore would remove the damage!
Thanks...
Clark
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