Paul,
Factory V8s were not fitted with tubular exhaust manifolds as standard.
They had a nasty set of cast iron jobs that had next to zero efficiency.
Most factory V8 owners who are not sticklers for originality have long since
placed the OE exhaust manifolds on the shelf for prosperity and had a good
set of headers fitted.
My factory car has done 100,000 miles since its restoration with around
80,000 of those miles using a set of "Mike The Pipe" headers out of the UK.
These never gave me any problems what so ever, nothing..... Only replaced
them because they were really not a too good a design and had a local pipe
man make me up a set of trick headers c/w HPC ceramic coating. Would
suggest to all you guys that you forget "off the shelf" headers available
from the MG vendors and simply find out who does the Hotter Rods in your
area and head along over and have a chat to him, he'll will be able to bend
you up a great set of headers that will get the gas out without the need for
butchering holes in the inner guards of your cars....... You'll be
surprised at the cost for a custom set of headers...... AND no more dramas
with them dropping on to the road.......
Cheers - Murray A.
Brisbane Aus.
----- Original Message -----
From: <paul.hunt1@virgin.net>
To: James Nazarian Jr <James.Nazarian@colorado.edu>; <mgb-v8@autox.team.net>
Sent: Tuesday, August 01, 2000 5:43 AM
Subject: Re: header clamps
> This seems to be referring to a sliding fit of one tube inside another,
the
> outer tube having two slits for a couple of inches, that just has a
> cicumferential clamp to hold the two together. Tubular manifolds as
fitted
> to factory V8s are like this, and I have had to refit my down-pipes on
> average about once a year (a real pig that requires dropping the complete
> system) because they gradually work off. The PO mentioned that they did
> come off whilst in motion for him once, and whilst that has not (yet)
> happened to me, on one occasion I had just got under the car to drop and
> refit them when one did just drop off - close call or what? I did fit a
> couple of coarse-threaded stainless steel bolts and nuts and pulled them
up
> real tight and that seemed to be holding them. I replaced the manifolds
> (tubulars again) a couple of months ago as the old ones kept cracking for
> some reason, and new clamps and bolts seem to be holding OK so far,
although
> I am not doing as much mileage as I was. I have spent some time under the
> car wondering if I could fit a forward hanger from the bell-housing.
>
> PaulH.
>
> ----- Original Message -----
> From: James Nazarian Jr <James.Nazarian@colorado.edu>
> To: <mgb-v8@autox.team.net>
> Sent: Monday, July 31, 2000 7:48 PM
> Subject: header clamps
>
>
> > I have noticed on a number of the new V8 headers that they use a slip
fit
> > with a single tabe that holds the two together, this is as opposed to
the
> > three bolt flanges that I am used to. How well does the slip fit work,
> > presumable it only works as well as the fit is tight, but does anyone
have
> > any particular comments on this type of fit? I am thinking of using it
to
> > connect my primaries to my secondaries.
> >
> > James Nazarian
> > '71 B roadster
> > '71 BGT ever so slowly turning into a V8
> > '63 Buick 215
> >
> > "Aerodynamics are for people who cannot build engines"
> > Enzo Ferrari
> >
> >
>
>
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