MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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Morty
Shawn Morton
Calgary Canada
(1 posts)

Registered:
01/21/2018 01:12PM

Main British Car:
MGB V8 Roadster 1978 3.5L

New Headers for my 78 roadster
Posted by: Morty
Date: January 21, 2018 01:16PM

So I'm finally getting around to the 78 Rover V8 MGB roadster that has been occupying space in my garage for the past year.
There are a few rust issues but my number one issue is with the block hugger headers. The engine has a Holy carb and the clearance between the bonnet
and the air cleaner has been an issue. There is no room to go down into the engine compartment because of the headers and the steering shaft.
I feel the RV8 style headers through the inner fenders is the best solution and will aid in cooling as well. I have done a little research and digging around and
felt that the headers offered by MGOC manufactured by Double S Exhaust would be the winner. Not to be! apparently MGOC is resorting and these are currently not available. I haven't reached out to Double S yet, rather thought I would begin here. Is there a comparable header available? How does the Moss RV8 header compare? Am I splitting hairs on performance, my engine has a mild cam and engine work I can't help but think almost anything is going to breath better than the block huggers.

Shawn
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mgb260
Jim Nichols
Sequim,WA
(1843 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: New Headers for my 78 roadster
Posted by: mgb260
Date: January 21, 2018 04:03PM

TS Imported Big Bore RV8 headers: [www.tsimportedautomotive.com]



Edited 1 time(s). Last edit at 01/21/2018 04:04PM by mgb260.


MGBV8
Carl Floyd
Kingsport, TN
(3273 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: New Headers for my 78 roadster
Posted by: MGBV8
Date: January 22, 2018 11:54AM

The block huggers can't be that bad in terms of moving air. Mike Moor's Buick 300 MGB was dyno'd at 306 RWHP using his old 215 block hugger headers. Not saying that he couldn't have possible done better with big bore RV8 headers.


mstemp
Mike Stemp
Calgary, Canada
(183 posts)

Registered:
11/25/2009 07:18AM

Main British Car:
1980 MGB Rover 4.6L

Re: New Headers for my 78 roadster
Posted by: mstemp
Date: January 22, 2018 02:58PM

Shawn,

If you want Stainless RV8 you could try Clive Wheatley for good headers. I used ones from another UK supplier and the quality was less than acceptable. (flanges don't line up with head ports).
By the time you get mild steel ones from the USA and have them coated its about the same costs as the stainless.

[mgv8.homestead.com]


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5389 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: New Headers for my 78 roadster
Posted by: BlownMGB-V8
Date: January 22, 2018 05:35PM

Stainless is fine but it will discolor over time. The ceramic coating is a pretty good insulator for how thin it is and makes a noticeable difference in the heat.

Jim


MGBV8
Carl Floyd
Kingsport, TN
(3273 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: New Headers for my 78 roadster
Posted by: MGBV8
Date: January 22, 2018 09:33PM

I prefer the ceramic coated for what Jim mentioned, engine bay heat reduction. Mine are a couple of months shy of 18 years old.


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