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MG MGB Technical - New Exhaust

Will my 75 MGB (with a 73 engine) sound much better with a new exhaust (i.e., monza, ansa)? Will it get any better performance?



Richard

Do you prefer the sound of a sewing machine or the sound of a freight train ?
We need more info to be able to answer your question - current exhaust, current exhaust manifold . . .
I am running a standard size pipe, austin marina exhaust manifold and single rear gibson muffler from proper MG and am very happy with mine.
.

Richard Sound is a matter of taste of course but my 79B has a monza system installed by previous owner.Its kinda loud,has no catalytic converter.If I ever need to replace exhaust again,Ill probably get another monza.
Michael

Nice thread..

I am just looking to replace my exhaust system in my 73B and am looking at alternatives. I would like a nice throaty sports car sound, maybe a dual tip muffler with a resonator(I have one now)...what are my options..anyone have opinions on what is good? I'm from the West coast of Canada and there are some performance systems from Octagon Motors in Vancouver. Does any one have any recommendations on them...are they any good?

I currently have a standard Exhaust manifold, As much as I would like to replace it, I am not really sure if I did I would benefit from it.

EJW Willis

Richard-
The Monza and Ansa systems are dinosaurs, left over from the early 70s. Their designs are, shall we say it politely, obsolete. If you want more performance, get a Peco system. It's a bit louder than an OE system, but the neighbors won't call the police whenever you drive in a normal fashion through your neighborhood. The noise level is acceptable for cruising on long highway trips, too. Exhaust note? A nice, rich Baritone rather than an ear-pounding Basso Profundo.
Steve S.

I went to the Peco exhaust web page, but they don't ssem to have anything for an MGB. Any ideas?
Richard

The Peco system is highly touted in pretty much all of the MGB catalogs. Moss, Brit Tek, Proper MG, etc. Get a catalog, see the Peco system, from header to resonator. I have the Peco header myself, with an otherwise custom 2" exhaust front to back. After a bit of straightening (from one who knows so much more than I), it was an excellent fit and an outstanding performer.
Barry Kindig

EJW Willis Overseas auto in vancouver can set you up with a very good exuast system for an MG. They basically only sell after market preformace products for inports they have a bunch of MG parts kicking around and they should send you a good deal. I personally like to build my own exuasts.

Good Luck
Ross

Can I make a suggestion?? I've heard good things about the Maniflow header and exhaust systems offered at APT Fast. A bit more expensive than Peco, but I think you might get a better system. I am torn between the two. The Maniflow is 1-3/4" with two resonators, and the Peco is 2" with one resonator. Big bore isn't always best. You must have SOME back pressure on the exhaust. Not sure I like two resonators, but from those who have installed it are very happy with the sound and performance. -Brian.
Brian Johnson

The Maniflow is available also in a 2" size, and in that size is available with or without the center silencer: "Race Header" and "Single" or "Twin Box Large Bore Exhaust" at APT.
David Cushman

Thanks for all of your help everyone. This is good info to help me out.

I am just going to check through the APT fast web site to see what they have and make decision on whether I would like the PECO or Maniflow.
Eric

I have just been checking the PECO web site, there are many models of exhaust. For those that know PECO, which exhaust works with the MG....BB2, BB4, Power MASTER, DTM?

Right now I'm thinking of either the DTM or the BB2 without checking out the prices yet

Thanks in advance
Eric

Ross:
Would you mind describing your MGB's exhaust system in a bit more detail?

Regards,
Jerry
Jerry Causey

Eric,

PECO also makes systems particularly for B's, as listed on the MGOC site (http://www.mgocspares.co.uk).

On the PECO-site, there's also some info on 'classic' MG exhausts, check: application list -> British Leyland.

Just a thought: why not considering a S/S exhaust (example: MGOC offers a Double S big bore, cost a bit more though)?

Hope to have helped you,

Alexander
'65 B
Alexander M

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Alexander
At last somebody else mentions the exhaust system from Double S. I've been wondering why I might be the only one with that system..maybe everybody knew something I didn't. Anyway I have the complete system from Double S, I bought it from The Proper MG on the east coast. LCB header, 2 inch pipe and single box. From my observations this system seems to be a very good copy of the highly touted PECO system, only it's made from stainless steel.

I've been running it for about 2 years now. I've been pleased with it, it fit well when installed, no leaks or cracks have devoloped in the header. It's actually been on two different cars, both of them daily drivers. Sure it costs a little more, but you shouldn't ever have to replace it, sounds good to boot(to me anyway.)
Jared Snider

Steve S., Virginia, USA stated:
[snips]
"Exhaust note? A nice, rich Baritone rather than an ear-pounding Basso Profundo."

Basso Profundo? Mine has more of a Basso Boffo sound! ;)

Kevin
Kevin Smith

you might want to consider your local muffler shop (not midas etc) but a pro muffler shop. they have all the current performance mufflers and are well suited to install them properly. 20 years ago i would crawl under my B and hammer and saw away to intall exhaust, not any more.
mike
mike

Yeah, I was thinking of that Mike..Going to a performance muffler shop and getting the new exhaust put on. It is probably what I want to do 'cause exhaust systems can be a real pain in the butt to install...I would much rather go into the shop informed about what works, make suggestions/recs on the setup. I may get a combination resonator of my choice combined with one of the mentioned mufflers to make the combo.
Eric

This is going to sound kind of lame, but: you can get a _fine_ exhaust system for a B from Midas! Plus #1, it comes with a lifetime guarantee. Plus #2, they'll install the bloody thing and throw out the old one out for you. I would be absolutely shocked if a Peco system improves the output of a standard 1800 engine.
Ted

Ted,

My 77 had a Midas exhaust purchased by the PO before I got it. They routed it up over the top of the axle instead of underneath, and it banged against the bottom of the trunk on even moderate bumps as well as turning the trunk into an oven. Almost any decent exhaust system designed for the B can be installed by anyone in less than two hours.

The Peco system is highly regarded by many tuning gurus (Burgess, etc.) and WILL increase performance, but only if the head, which is the most restrictive component in the system, has been worked to increase flow. Once the head has been done, the exhaust and air filters become the most restrictive. The exhaust is only one part of the equation, but a well designed performance exhaust system is not going to come from Midas. As long as all the pipes fit together, they consider it good.
Paul Konkle

Ted-
I am gratified that you are aware of the truly superior exhaust systems installed at my many locations. If only the racing community would see the light, they would bring their machinery to me and quit wasting money on specialty aftermarket systems. Hmmph!! What is a Peco anyway!
King Midas

Sure Jerry. I welded up my exhaust it was a little tricky but well worth it has a deep kind of rumble to it. Its all T.I.G. welded and every thing is stainless from the brackets to the filler rod. It took me about 4 hours in total to weld it up.

I run a custom stainless header with a borla 3 to 1 collector. The header has a 2 1/4 collector and from the header I run a Stainless Y pipe going into dual 2 1/4" stainless pipe then I run a Stainless Vibrant performance Glass pack resonator then on the ends I run oval Borla Stainless resonated tips. Every thing together cost me about $600 CDN The stainless bends are pricey at about $45-50 CDN each and I used 4 in total. The glass packs were $80 each, the tips $60 each about $100 in stainless pipe, $60 for the collector and $55 for the Y pipe
Ross

This thread was discussed between 01/04/2002 and 04/04/2002

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