215 Buick/Olds exhaust manifolds & Buick 300 should fit any of the Rover
3.5-4.6 engines, the question is what car is the engine to be installed in.
If it is a MGB, the American manifolds will only work if turned backwards
with the exhaust pipe exiting toward the front of the car. A few people have
done that ( very few) & run the exhaust down in front of the engine & then
to the rear of the car.
For a MGB swap, headers, either block huggers or RV8 are the only real
answer, although Adrian Ackhurst in Australia makes a beautiful set of equal
length tube headers for a B swap, on a custom order basis.
Mufflers are large "silencers", resonators are small "silencers", used when
the main muffler cannot provide enough silencing. On my V8 roadster, there
was not enough room for a muffler that would give me as quiet an exhaust as
I wanted, so the solution was a resonator near the ends of the system. This
is very common practice. The 4 cyl B has both, as does the original factory
V8.
In many cases, the resonator is simply a chamber with baffles & has no
packing.
Jim Stuart
Reply to <jimbb88@usa.com>
-----Original Message-----
From: owner-mgb-v8@autox.team.net [mailto:owner-mgb-v8@autox.team.net]On
Behalf Of James Jewell
Sent: Monday, June 10, 2002 12:51 PM
To: MGB-v8 list
Subject: Resonator vs. Muffler?
Basic automotive question folks:
What (if any) is the difference between a resonator and a muffler. I've
noticed that some cars have a 2-stage exhaust system, where the first
component looks just like a glass-pack, which is then followed by the
"traditional" muffler. The first component is often refered to as the
"resonator", but I've never seen an aftermarket parts catalog sell
individual "resonators". Is it just a glasspack? Is any muffler in
that position called a "resonator"? If not, what is it, really, and
what does it do?
Thanks.
p.s. It seems like Ford, Mopar, and Chevy each basically have two
exhaust manifold patterns: Small-block, and Big Block, and it seems
like exhaust manifold designers only have to design products for those
two patterns. I know Buick has similar dimensionality between certain
engines and accessories. Can anyone tell me if the exhaust manifold
from any other Buick V-8 will fit the 215/300/Rover heads? There seem
to be many more manifolds available in England/Australia for the Rover
than we have here in the colonies. Some of the Morgan +8 ones look
promising but seem to be made of unobtanium on this side of the pond.
James J.
p.s.s Has anyone messed with Roller Rockers on the B.O.P.R???
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