BritishV8 Forum: rover 3.5 single plane intake??

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

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

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Re: rover 3.5 single plane intake??

Posted by: BlownMGB-V8
Date: October 04, 2009 12:51PM

It would be a little wider. The P76 has about a 17mm taller deck (~.675") and the 300 has about a 9/16" taller deck. (exact figures are available if you do a search) The 340 is ~1-3/16" taller.

Jim

v8fangio
Steve Foldhazy
Sydney,OZ
(5 posts)

Registered:
10/04/2009 12:17AM

Main British Car:
73 MGBGTV8 M.G.4.2

Re: rover 3.5 single plane intake??

Posted by: v8fangio
Date: October 05, 2009 02:11AM

The wider Willpower manifold for a P76V8 could be machined by a good engineering shop, i'll ask Bill Laney and report back.

hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: rover 3.5 single plane intake??

Posted by: hoffbug
Date: October 06, 2009 06:39AM

I got a response from Bill myself..

Hi Tony

P76 manifold valley width is 8 ¼”

Buick valley is 7 ½”

Rover V8 valley is 7”

I can make the Rover manifold wider by casting extra metal on manifold flange to suit Buick 300.

This means there will be no spacer plate required.

Valley plate will be cast and added to seal valley to block.

It will be purpose built to suit Buick 300 motor.

I will e-mail pic when I cast in approx. 4 weeks.

Regards

Bill

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

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

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Re: rover 3.5 single plane intake??

Posted by: BlownMGB-V8
Date: October 06, 2009 08:35AM

That was quick. You know, once he does the 300 intake it's a very small step from there to the 340 intake. Nobody makes one of those at all, and it shouldn't be hard to make it suitable for use with the new TA heads. Think of that, a light weight 340/350 cu.in. motor with performance alloy heads and a single plane intake that is a straight swap for the 300. I know they will be getting several sets of those new heads in Australia within the next few months. Tony, would you care to suggest that to him? There is an active Buick performance group who would probably jump right on that, in fact I have heard some of the 350 guys say they would build a 340 if they could get an intake.

Jim

hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: rover 3.5 single plane intake??

Posted by: hoffbug
Date: October 06, 2009 12:22PM

JIm.. I think the manifold port sizes would work OK on a 300.. the problem with just widening that manifold is that the port sizing would probably be too small for a 340... Even the Iron 300 heads are larger than the Aluminum 300 heads.. The problem with this type of custom stuff is that the average enthusiast just wants to buy a bolt on item from a T/A or a Poston... and at Small block Chevy pricing to boot..

Its too bad a Poston or T/A couldnt buy a dozen or so in either size ( Buick /Rover 215 and Buick 300) From Bill and offer them up on a trial basis... Only these guys would know if there is enough of a market to justify casting up a larger port manifold..

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

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

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Re: rover 3.5 single plane intake??

Posted by: BlownMGB-V8
Date: October 06, 2009 06:09PM

The distance across the valley on the 340 is 8-13/16", so a 1/4" spacer per side should come pretty close to making the P76 intake fit... if there's a 4bbl one available. That'd take care of the 340 with alloy 300 heads, but as you mentioned, the TA heads have larger ports.

Jim

Greg55_99
Greg Williams

(102 posts)

Registered:
11/01/2007 07:12PM

Main British Car:

Re: rover 3.5 single plane intake??

Posted by: Greg55_99
Date: October 07, 2009 05:44PM

Yes, the P76 manifold is wider than the Buick 300 manifold. I know for sure.

Greg

v8fangio
Steve Foldhazy
Sydney,OZ
(5 posts)

Registered:
10/04/2009 12:17AM

Main British Car:
73 MGBGTV8 M.G.4.2

Re: rover 3.5 single plane intake??

Posted by: v8fangio
Date: October 10, 2009 12:36AM

To recap,Bill Laney- MAXWEDGE is still making Rover v8 single plane manifolds , as well as for P76, and now also making new single plane manifolds for Buick 300 this month. to contact Bill ,email [williaml@hotkey.net.au]. I'm lucky as only live few minutes from Bill and can pop around to see his latest manifold.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar

Re: rover 3.5 single plane intake??

Posted by: BlownMGB-V8
Date: October 10, 2009 10:22AM

Steve, why don't you ask him what it would take for him to do one to match the TA-Performance heads to the 340? Ian at Triumph-Rover Spares will be getting two or three of the first four sets of those heads (by year's end - they are now being machined) and several guys stateside have expressed an interest in a 340 based build-up if they had an intake. I'd be happy to pass the information along to them.

Jim

Greg55_99
Greg Williams

(102 posts)

Registered:
11/01/2007 07:12PM

Main British Car:

Re: rover 3.5 single plane intake??

Posted by: Greg55_99
Date: October 10, 2009 07:37PM

Buick 340 (left) P76 single plane with spacers (right)

Size is OK.... but.....

Port size is not so OK... It would work fine with 64 Buick 300 heads. Not so much with the later ones or the TA heads...

Greg

Edited 1 time(s). Last edit at 10/10/2009 07:38PM by Greg55_99.

v8fangio
Steve Foldhazy
Sydney,OZ
(5 posts)

Registered:
10/04/2009 12:17AM

Main British Car:
73 MGBGTV8 M.G.4.2

Re: rover 3.5 single plane intake??

Posted by: v8fangio
Date: October 11, 2009 11:46PM

Bill Laney ''Maxwedge'' told me he will look at TA performance heads to make a new manifold if and when he can get a hold of a set.At moment manifold for Buick 300 is been made, contact Bill on williaml@hotkey.net.au.

BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar

Re: rover 3.5 single plane intake??

Posted by: BlownMGB-V8
Date: October 12, 2009 01:19AM

Thanks Steve, I'll pas the word along.

Jim

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