Thanks Vance,
Some observations, and answers to your questions.
I would like to keep this manifold, but I won't fit the head. But if I
rebuilt my old head (from the 73) would that fit and fix my problems?.
But this may be going too far as far as that is conserned.
The '73 or CR engine did not have an EGR, and it did have an anti-runon
valve, I can use the setup from the 73 carbs for this. It's the vacume
fitting for the brake booster that may be a problem.
The CC motor does have a different flywheel with the pilot bushing
inside the crank, as opposed to on the flywheel. But I have the correct
flywheel, just need to get a new pilot bushing.
SO I guess I'll change out the manifold, use my '73 hoses from the carbs
and adjust the mixture to accommodate the increased compression, also
check the ant-runon to see how it can connect. I've been looking at the
TRF drawings to see what I have to do.
Did I miss anything?
Gene
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Navarrette, Vance
Sent: Monday, November 10, 2003 4:24 PM
To: genehart@att.net
Cc: 6pack@autox.team.net
Subject: RE: Engine Head question
Gene:
One thing to consider; The earlier manifold is considerably
less efficient in terms of flow than the later manifold. You might
lose a few ponies as a result. The runners are not nearly as 'straight'
on the earlier manifolds.
As I recall the 1973 did not have an EGR, so that should not be
an issue, but I don't know when the anti-runon valve was added. You
might need to change the vacuum fitting on the earlier manifold to
accommodate the extra vacuum line needed by the anti-runon valve.
Also, the earlier heads had a higher compression ratio
than the later heads (8.5:1 vs 7.75:1, as I recall. This is from memory
and I am sure someone will correct me if I am wrong. Getting older, and
memory is very unreliable) so the mixture will certainly need tweaking.
Should be no big deal with the later carbs.
The CC motors had a different cam, and a different crankshaft.
Somebody help me out here; don't remember if the flywheel was different
on the CC motors to accommodate the crank difference. All I remember is
that the rear crankshaft snout was a different length, and that they
were not interchangeable unless some other parts were also changed.
Dang it! Wish my memory was better.
They say memory is the second thing to go when you get older. I
don't remember what the first thing to go is. =:-o
Vance
-----Original Message-----
>
>
> From: genehart@att.net
> Reply-To: genehart@att.net
> To: 6pack@autox.team.net
> Subject: Engine Head question
> Date: Mon, 10 Nov 2003 17:19:42 +0000
>
> List,
>
> I'm preparing my new rebuilt engine for installation in my 6, but I
may have
> a problem. I'm installing a CC engine from 1969, but my intake and
exhaust
> manifolds are from my original 1973 engine. Will I have to replace the
head
> on the newly rebuilt engine with a later one for it to fit? I can't
test fit
> right now, since both the manoflds are out being painted and polished.
>
> --
> Gene Hart
> genehart@att.net
|