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MG MGB GT V8 Factory Originals Technical - RV8 manifolds

Would anyone know how much extra bhp the RV8 exhaust manifolds are worth over the standard style and would you go with a twin or single system? Many thanks, David.
David

David,

Obviously not a MGOC member as article in this months mag, should appear it whats new soon.

The Twin / Single is more about how to feed past Petrol tank. Both MGOC and Frontline have redesigned tanks.

There is a choice between 4-2-1 Frontline or 4-1, mind you its very close to wheels on full lock with single, ie do not leave it parked on lock unless you wish to cook tyre.

The twin really needs a balance pipe or x pipe, and could exit before rear wheels.

Ground clearance is tight, I have about 2.5ins even using Mikalor clamps.

Not measured bhp but my existing block huggers were knackered.

Paul
Paul

>>>should appear it whats new soon
=== pls translate into English :-)
David S

David,

Top of Home page this site, most of articles from both mags.

http://www.mgcars.org.uk/news/news.html

Paul
Paul

thanks - not there yet.
David S

David,

While waiting for article some background reading!

http://www.burnsstainless.com/TechArticles/Construction/construction.html

Paul
Paul

David
You might talk to Clive Wheatley - as i recall there is about 13 BHP in it.
RMW

I gained 10 HP at the wheels on the dyno when I switched from block huggers to RV8 style.

Martyn
http://www.mgbexperience.com/ca-mgbv8
Martyn Harvey

Thanks for the replies. I am a member of MGOC and have read Rob Pulleyblanks article but just wanted a bit more info to fill in the holes, plus a spread of opinions.
I'm using a twin system with huggers at the moment. The twin was fairly troublesome for routing and with the tank reconstruction but the sound is excellent. Thought I'd switch to the RV8 style and at the same time decide whether to stick with the twins or not. The one thing my system doesn't have is a balance pipe and I would appreciate a view on what this actually does apart from balance the pressure. More power?!!!

Thanks, David.
David

David

http://www.houston-f-body.org/tech/exhaust/exh7.jpg

I suppose this should be compared to the effect of X or Y connector

Paul
Paul Wiley

Hi Guys,

What about a twin system running running down one side only; a bit like the stag system i.e. both pipes sharing the same muffler. Has any one been using this type of system? It should give all the benefits of a twin system without the fuel tank problems.

David
David Halliday

David,

This avoids prob altogether

http://home.tiscali.nl/fdegroot/perry.htm

Paul
Paul Wiley

David,

I have seen the system you describe. It is available, but I have no idea what it does to available hp/torque. So it is there, but if it works better than another twin system, or a single system...no idea.

Frank
Frank de Groot

David,
www.maniflow.co.uk
Regards.
michel

Frank

The twin pipe can work with a X connector rather than Y. It also helps on Ground clearance issues. Does the RV8 have this system?

Paul
Paul Wiley

I was told so, Paul. I am going to look into this system. Would like to know how performance is, and if sound is really V8 like.

Frank
Frank de Groot

Frank,

These look like the twin

http://mgv8.homestead.com/RV8.html
Prob most gains are from exiting via inner wing.

Pauk
Paul

Exactly the system I was looking at. Together with the manifolds through the inner wing it will aid with underbonnet heat and will enable more or less standard setup. Looks more original, and enables the use of the standard tank. But a completely original system is also a good candidate.

But it can wait. And maybe first try a balance pipe with my current system, though it doesn't seem to suffer from uneven idle; it's quite nice. Wonder too who would be interested in buying my almost new system w. modified tank and all bits and pieces. Maybe put it in EMG.

Frank
Frank de Groot

The RV8 runs a twin system. Infact I recently saw an add where Clive Wheatly is now selling RV8 replica twin exhaust systems.
Peter

This thread was discussed between 13/02/2004 and 29/02/2004

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