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roverman
Art Gertz
Winchester, CA.
(3075 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: roverman
Date: August 24, 2020 02:12PM

New, never installed. Pattern is Rochester 2GC. IF your crafty, adapt 2 Webbers/ etc. ? $210.
10% of sale price will go to BV8. Contact with BV8 message system.
Thanks, Art.


MGBV8
Carl Floyd
Kingsport, TN
(4014 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: MGBV8
Date: August 25, 2020 09:21AM

Or, adapt a Holley Sniper 2 bbl EFI.


jjohanski
James Johanski

(56 posts)

Registered:
11/15/2017 08:57AM

Main British Car:


Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: jjohanski
Date: August 25, 2020 11:42AM

Or adapt two Holley Sniper 2 gc type EFI's. Maybe with progressive, but distribution may be bad.


MGBV8
Carl Floyd
Kingsport, TN
(4014 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: MGBV8
Date: August 26, 2020 10:01AM

"Or adapt two Holley Sniper 2 gc type EFI's"

It's a 2 bbl manifold, James.

I said adapt a Holley Sniper 2 bbl because I am not sure on the flange mounts.



Edited 1 time(s). Last edit at 08/26/2020 10:03AM by MGBV8.


roverman
Art Gertz
Winchester, CA.
(3075 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: roverman
Date: August 29, 2020 06:05PM

I think "copies" are available ? Big Olds joke, after they killed the 215" Jet-fire, they put ONE, 2GC on the 394" V8, in 64, and air cleaner said Jet-fire, What a shame...


jjohanski
James Johanski

(56 posts)

Registered:
11/15/2017 08:57AM

Main British Car:


Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: jjohanski
Date: September 07, 2020 05:00PM

Carl, Discription says twin 2 barrel--doesn't that mean 2 twos? Rochester 2GC Sniper would fit right on with no adapter--that is two of them. These I believe were for dual 2 barrel rochester. I do not know if they were progressive or one to one. I think one to one for distribution.


Moderator
Curtis Jacobson
Portland Oregon
(4481 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: Moderator
Date: September 09, 2020 01:28AM

I think Offy and Edelbrock have both offered twin 2bbl manifolds for 215. Kurt Schley's How-It-Was-Done article reported that he used the Edelbrock version:

Quote:
Dual Rochester 2-bbl carburetors on Edelbrock manifold. Individual carbs are same as originally supplied on the Buick/Olds 215 low compression 2-bbl engines (except now equipped with .052" main jets and progressive linkage. Choke butterflies removed.)

Unfortunately, I didn't take very good photos of it when I had the chance - at the 1998 BritishV8 meet in Annapolis.



MGBV8
Carl Floyd
Kingsport, TN
(4014 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: MGBV8
Date: September 09, 2020 08:38AM

"Carl, Description says twin 2 barrel--doesn't that mean 2 twos?"

Yep.


Richard/SIA
Richard Brengman
No. Nevada
(377 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: Richard/SIA
Date: December 11, 2020 11:16PM

I may have to buy this if I can get two Weber DCNF 40mm or 42mm to fit.
Need to compare bore spread and bolt patterns.


Richard/SIA
Richard Brengman
No. Nevada
(377 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: Richard/SIA
Date: December 12, 2020 12:01AM

Hmm, found some info.
[www.chevyclassicsclub.com]
There are early and late version 2GC's.
Mounting and bore differs.
Still looking for bore spacing.
Yes, I did find a source of almost reasonably priced DCNF's.


Richard/SIA
Richard Brengman
No. Nevada
(377 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: Richard/SIA
Date: December 12, 2020 01:29AM

No. 5262?


Richard/SIA
Richard Brengman
No. Nevada
(377 posts)

Registered:
01/17/2014 07:47PM

Main British Car:
1969 Triumph GT6+ 225" Buick V6

Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: Richard/SIA
Date: December 12, 2020 02:48PM

Does this manifold feed four cylinders from each carb, or is the plenum full length so that all eight cylinders pull from both carbs?
A bottom view would probably make this clear but I have not been able to locate one.


MGBV8
Carl Floyd
Kingsport, TN
(4014 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB, Buick 215

authors avatar
Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: MGBV8
Date: December 13, 2020 09:56AM

Does this help?
Quote:
01-30-2018
Both Offenhauser made dual 2 barrel carb intakes for Rochester 2GC carbs. The Offenhauser was similar to the EquaFlow 360 (single plane open plenum with short runners). The Edelbrock was a dual plane and the casting was surprisingly similar to the Edelbrock Performer Rover but with the dual carb flanges.

Dan Jones



roverman
Art Gertz
Winchester, CA.
(3075 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: roverman
Date: December 17, 2020 05:36PM

Open plenum, like all of their single plane 215/RV8 manifolds. Single bolt pattern. Art.


DLCameron2
Don Cameron

(1 posts)

Registered:
01/08/2021 12:34PM

Main British Car:


Re: Offy Twin 2bbl. Intake Manifold, 215/ RV8
Posted by: DLCameron2
Date: January 21, 2021 09:20AM

WTB Offy Manifold like this one. Is it still available?



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