Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

Go to Thread: PreviousNext
Go to: Forum ListMessage ListNew TopicLog In


Dan Jones
Dan Jones
St. Louis, Missouri
(278 posts)

Registered:
07/21/2008 03:32PM

Main British Car:
1980 Triumph TR8 3.5L Rover V8

Rover/Buick Intake Manifolds
Posted by: Dan Jones
Date: July 04, 2021 09:56PM

Thought I'd share a picture of cleaning up some Rover/Buick intakes in preparation for some dyno testing.
Buick_Rover_intakes_01_90.jpg


Dan Jones
Dan Jones
St. Louis, Missouri
(278 posts)

Registered:
07/21/2008 03:32PM

Main British Car:
1980 Triumph TR8 3.5L Rover V8

Re: Rover/Buick Intake Manifolds
Posted by: Dan Jones
Date: July 04, 2021 09:58PM

From another angle:
Buick_Rover_intakes_06_90.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6390 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar
Re: Rover/Buick Intake Manifolds
Posted by: BlownMGB-V8
Date: July 05, 2021 12:06PM

Good thing we aren't in the same city Dan, could be dangerous.

Jim


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Rover/Buick Intake Manifolds
Posted by: roverman
Date: July 05, 2021 02:17PM

What is that LARGE port manifold, top right, pic #1 ? We appreciate your efforts.
Art.


Dan Jones
Dan Jones
St. Louis, Missouri
(278 posts)

Registered:
07/21/2008 03:32PM

Main British Car:
1980 Triumph TR8 3.5L Rover V8

Re: Rover/Buick Intake Manifolds
Posted by: Dan Jones
Date: July 05, 2021 04:43PM

> Good thing we aren't in the same city Dan, could be dangerous.

Dangerous but in a good way (but not for the neighbors).

> What is that LARGE port manifold, top right, pic #1 ?

That's a 1971 Ford Boss 351C aluminum dual plane intake. It was also fitted to the 1972 HO 351C. An iron version was fitted to standard 351C-4V engines. I had it sitting next to a Rover intake to illustrate the port size differences. The 351C-4V has 2.19"/1.71" diameter valves and ports bigger than many big blocks but the heads were used on engines down to 302 cubic inches (Boss 302). With about $150 labor in short side radius work, factory 351C-4V heads will flow over 320 CFM compared to a Rover at maybe 125 CFM. The ports are really too large for most applications and Ford's racing derivatives got progressively smaller port sizing. That said, through a stroker crank at them for 400+ cubic inches and they really come alive.

> We appreciate your efforts.

I still need to come up with a source for larger diameter trumpets for the Rover EFI intake before I can start testing. Not pictured above is an Edelbrock Performer Rover dual plane but I've got a stock one and one that has been extrude honed to test.

Dan
351C_vs_Rover_intake_ports_90.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6390 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar
Re: Rover/Buick Intake Manifolds
Posted by: BlownMGB-V8
Date: July 06, 2021 09:53AM

Sometimes a muffler shop can bell out tubing into an acceptable shape.

Jim


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Rover/Buick Intake Manifolds
Posted by: roverman
Date: July 06, 2021 04:18PM

Did I mention I have a Hilborn Inj. for 215+. It has 1.8" butterflies. No trumpets.
Art.



turbodave
dave cox

(162 posts)

Registered:
04/30/2018 03:00PM

Main British Car:
SD1

Re: Rover/Buick Intake Manifolds
Posted by: turbodave
Date: July 11, 2021 11:36AM

Iíve also been struggling to locate some inlet trumpets that appear to be value for money and begrudge spending that much from the UK.
I donít believe they need to be significantly larger than they are; The twin throttle plenum system homolated for the last of the Ď85 & Ď86 SD1 vitesses for touring car duty, had 41mm vs 38mm trumpets - but also use a wider plenum base (and a twin intake plenum) to increase volume and area around the (larger) trumpets.


Personally, I am going to try this in the near future as I have a lathe and feel like this would be easy.
[youtu.be]

Donít forget about modifying the dogleg on the lower EFI manifold (if chasing high flow)


turbodave
dave cox

(162 posts)

Registered:
04/30/2018 03:00PM

Main British Car:
SD1

Re: Rover/Buick Intake Manifolds
Posted by: turbodave
Date: July 11, 2021 11:44AM

This is a pic of the twin plenum (or more correctly termed the twin throttle plenum) trumpet / base.

These use the standard lower inlet manifold but the plenum base is 20mm wider...
The trumpets are also 3/4Ē shorter than the standard plenum.

359B24DB-7784-437D-A010-3D01F2F7B30F.jpeg



I'm sure youve come across this site - he seems to update it as new stuff appears.
[www.mez.co.uk]



Edited 2 time(s). Last edit at 07/11/2021 11:59AM by turbodave.


minorv8
Jukka Harkola

(267 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Re: Rover/Buick Intake Manifolds
Posted by: minorv8
Date: July 12, 2021 07:21AM

Dave, I did a set of trumpets years ago. Instead of annealing I simply used a hydraulic press and pressed the top of trumpet with a similar conical arbor as in the video. I have absolutely no idea what series aluminum I had but definitely weldable.

Again, no idea about the performance gains over srd setup but on psychological scale they must be huge. That 4.6 engine with Merlin heads put out 314 hp at flywheel on rolling road. I'll upload a photo soon.


turbodave
dave cox

(162 posts)

Registered:
04/30/2018 03:00PM

Main British Car:
SD1

Re: Rover/Buick Intake Manifolds
Posted by: turbodave
Date: July 13, 2021 12:10PM

Was the 314hp you mention on the standard trumpets? I thought the Merlin head didn't use the standard inlet manifold - or am i getting mixed up?


minorv8
Jukka Harkola

(267 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Re: Rover/Buick Intake Manifolds
Posted by: minorv8
Date: July 14, 2021 12:11AM

Nope, with larger/shorter trumpets, ported intake and 75 mm front mounted throttle body. Merlins accept normal Rover intakes. Wildcats and TA heads are another story.


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Rover/Buick Intake Manifolds
Posted by: roverman
Date: July 14, 2021 11:32AM

AIR., my McKenzie ported Merlin Int. flowed 220+/- cfm @ 28", .600 lift ? Art.


minorv8
Jukka Harkola

(267 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Re: Rover/Buick Intake Manifolds
Posted by: minorv8
Date: July 14, 2021 01:29PM

What kind of HP figures have you got with them, Art ?



Edited 1 time(s). Last edit at 07/14/2021 01:30PM by minorv8.


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

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

Re: Rover/Buick Intake Manifolds
Posted by: roverman
Date: July 14, 2021 04:20PM

Zero. Working on 4340 forged crank and a built, 6V71 supercharger, with the Merlins, ( they are pretty thick). Likely my first motor
for 51' Buick Special, lead sled without lead. Buick with Buick = nice ring to it. Art.



Sorry, only registered users may post in this forum.