Rover V8 plenum chamber water jacket : MG Engine Swaps Forum : The MG Experience

Rover V8 plenum chamber water jacket #1 This topic is about my 1979 MG MGB GT V8 Conversion
MGB567 Barrie Braxton Ninderry, KabiKabi country, Queensland, Australia Sign in to contact 1966 MG MGB MkI "Money Guzzler" 1979 MG MGB GT V8 Conversion "Darkside"	Topic Creator (OP) Aug 17, 2017 05:43 AM Top Contributor Joined 13 years ago 32,642 Posts

How essential is this below and what is its function?

I have one but we are probably going to "modify" the stock plenum chamber (or make a bespoke) and my TB will be located somewhere in the intake pipe. I remember advice that I didn't necessarily require a flame trap given my rocker covers only have a hole for oil pouring so I was wondering.

Mk1: CKD 11/66 first registered 8/5/67; owned since 3/77. 18GB +40 balanced. Peter Burgess BVFR head. Piper 285. 123. FidanzaFW. 4synch c/r box. Lots more as I did a nut and bolt rebuild; finished 2015. Tartan Red.

GT: December '78. VW Golf guards, flush fit front and rear valances. Torana XU1 vents, frenched indicators & Mk1 rear lights. 'Worked' Rover V8 with Monsoon ECU for EFI. GM4L60E, Lokar tiptronic & Quick4 controller. Vintage Air A/C. FC IFS. CCE 4 link rear. Salisbury with Quaife. Jaguar Storm.

chamber.jpg 11.7 KB

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Re: Rover V8 plenum chamber water jacket #2
mstemp Mike Stemp Calgary, AB, Canada Sign in to contact 1980 MG MGB V8 Conversion	Aug 17, 2017 06:22 AM Joined 17 years ago 682 Posts

No need unless you get a massive drop in ambient temps!
It is to prevent ice up on the throttle plate.

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Re: Rover V8 plenum chamber water jacket #3
MGB567 Barrie Braxton Ninderry, KabiKabi country, Queensland, Australia Sign in to contact 1966 MG MGB MkI "Money Guzzler" 1979 MG MGB GT V8 Conversion "Darkside"	Topic Creator (OP) Aug 17, 2017 06:28 AM Top Contributor Joined 13 years ago 32,642 Posts

Thanks Mike - not much chance of that. It was 31C here today and Winter's not over yet!

Mk1: CKD 11/66 first registered 8/5/67; owned since 3/77. 18GB +40 balanced. Peter Burgess BVFR head. Piper 285. 123. FidanzaFW. 4synch c/r box. Lots more as I did a nut and bolt rebuild; finished 2015. Tartan Red.

GT: December '78. VW Golf guards, flush fit front and rear valances. Torana XU1 vents, frenched indicators & Mk1 rear lights. 'Worked' Rover V8 with Monsoon ECU for EFI. GM4L60E, Lokar tiptronic & Quick4 controller. Vintage Air A/C. FC IFS. CCE 4 link rear. Salisbury with Quaife. Jaguar Storm.

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Re: Rover V8 plenum chamber water jacket #4
mstemp Mike Stemp Calgary, AB, Canada Sign in to contact 1980 MG MGB V8 Conversion	Aug 17, 2017 06:33 AM Joined 17 years ago 682 Posts

Just be aware that the mounting holes are not all blind, so you need some loctited in Allen head studs to plug them. If not you will have a great vacuum leak.

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Re: Rover V8 plenum chamber water jacket #5
mgv8glen Glenn Towery Dover, DE, USA Sign in to contact 1974 MG MGB GT	Aug 17, 2017 06:39 AM Top Contributor Joined 16 years ago 6,778 Posts

Have never run one & have never Iced up. With lowering the plenum the cover will hit the top of valve cover. There are 2 hole, that go through the cover that will let air into the plenum that need to plugged or you will get a 2500 rpm idle. I used a 1/4 course Allen plug.

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Re: Rover V8 plenum chamber water jacket #6
MGB567 Barrie Braxton Ninderry, KabiKabi country, Queensland, Australia Sign in to contact 1966 MG MGB MkI "Money Guzzler" 1979 MG MGB GT V8 Conversion "Darkside"	Topic Creator (OP) Aug 17, 2017 07:20 AM Top Contributor Joined 13 years ago 32,642 Posts

Ok thanks for the advice to plug the holes if I use the "stock" plenum.

Mk1: CKD 11/66 first registered 8/5/67; owned since 3/77. 18GB +40 balanced. Peter Burgess BVFR head. Piper 285. 123. FidanzaFW. 4synch c/r box. Lots more as I did a nut and bolt rebuild; finished 2015. Tartan Red.

GT: December '78. VW Golf guards, flush fit front and rear valances. Torana XU1 vents, frenched indicators & Mk1 rear lights. 'Worked' Rover V8 with Monsoon ECU for EFI. GM4L60E, Lokar tiptronic & Quick4 controller. Vintage Air A/C. FC IFS. CCE 4 link rear. Salisbury with Quaife. Jaguar Storm.

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