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roverman
Art Gertz
Winchester, CA.
(2862 posts)

Registered:
04/24/2009 11:02AM

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

What if, Quad valve RV8 ? Not BMW
Posted by: roverman
Date: May 21, 2014 12:38PM

Suppose it DID happen, in 4-5L. form ? What class could it road race in ? Vintage something ? Does it truly belong in a Jensen Healey or a Jensen GT ? 5L should make 500 hp., no problem, with suitable road course torque/hp band. Four, 44mm IDF's-or ? Please share your skilled thoughts.Thanks, roverman.


roverman
Art Gertz
Winchester, CA.
(2862 posts)

Registered:
04/24/2009 11:02AM

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

Re: What if, Quad valve RV8 ? Update
Posted by: roverman
Date: May 23, 2014 04:12PM

A LOT needs to happen, for this build to be, successful. But... if it is, why not in a Jensen Healey ? The cam covers are already correct, only twice as many of them ? It would be lighter than a 6.1L hemi, with comparable power. All hail the mighty B cam(s) !


Moderator
Curtis Jacobson
Portland Oregon
(4305 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: What if, Quad valve RV8 ? Not BMW
Posted by: Moderator
Date: May 24, 2014 11:42PM

You're right. J-H is the right vessel for this!


Todd McCreary
Todd McCreary

(193 posts)

Registered:
03/16/2012 10:57PM

Main British Car:


Re: What if, Quad valve RV8 ? Not BMW
Posted by: Todd McCreary
Date: October 12, 2014 01:37AM

Suppose it DID happen, in 4-5L. form ?


Uh, it HAS happened?

[en.wikipedia.org]

Repco has done this in at least 3.0L, 4.2L, 4.3L and 5.0L


roverman
Art Gertz
Winchester, CA.
(2862 posts)

Registered:
04/24/2009 11:02AM

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

Re: What if, Quad valve RV8 ? Not BMW
Posted by: roverman
Date: October 14, 2014 12:57PM

Todd and clan, to clarify, using oem Lotus heads on the RV8, is a viable solution vs mostly impossible, obtaining Repco V8 variants. This is a project of love/challenge, and blissfully free, of common sense. Where one to ask Fred Key, Pete Aardema and to a small extent,(just getting started), myself," how much per hour will you make" ?, Who's counting ? Cheers, roverman.


Todd McCreary
Todd McCreary

(193 posts)

Registered:
03/16/2012 10:57PM

Main British Car:


Re: What if, Quad valve RV8 ? Not BMW
Posted by: Todd McCreary
Date: October 15, 2014 02:19PM

roverman
Date: October 14, 2014 12:57PM
This is a project ... blissfully free, of common sense.



Always the best kind.

However, your original question was "how it should be classified for racing". And my reply isn't simply smartass, it may be applicable to your subject.

What were those Repco OHC 5.0L cars classified as?

"The sports car engine (increased in size to 5.0 litres) was however dominant domestically, powering cars to several wins in the Australian Sports Car Championship and its predecessor the Australian Tourist Trophy, most notably powering the Matich sports cars built and raced by Frank Matich, and Elfin Sports Cars built and raced by Garrie Cooper ."



Edited 2 time(s). Last edit at 10/15/2014 02:24PM by Todd McCreary.


djw090
David Witham
Warwick UK
(115 posts)

Registered:
06/12/2008 11:20AM

Main British Car:
MGB 1974 and MG ZT 160 turbo 2005

Re: What if, Quad valve RV8 ? Not BMW
Posted by: djw090
Date: November 06, 2014 08:34AM

My sources tell me that around the time the BL/Rover O series SOHC engine that was being converted to DOHC 4 valve to make the M series engine there was a project to do something similar with the Rover V8. Unfortunately I don't know much about it. I am told that in those days they had some good design engineers but not enough money to put all the ideas into production so there was quite a lot of what they called shelf engineering going on. The O series was itself an adaptation of the OHV B series engine.



trgrrr8
Clark Bruce Strock

(4 posts)

Registered:
11/26/2013 03:57PM

Main British Car:


Re: What if, Quad valve RV8 ? Not BMW
Posted by: trgrrr8
Date: December 18, 2014 06:02AM

Wildcat Engineering has a 6 + litre with 4 inch bore, and big valve heads. or take a 300 Buick out to 350 cubes with 340/350 crank 3.850 inches in 3.80 bore use 300 aluminum heads with big valves for light weight. But BADASS is best with 455 block.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5306 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar
Re: What if, Quad valve RV8 ? Not BMW
Posted by: BlownMGB-V8
Date: December 18, 2014 10:31AM

Yes, the MG-Roadmaster uses the TA-Performance Street Eliminator heads for fenderwell clearance on the 455 with tubing log exhausts. Requires some body mods but not as much as you might think. Relocated steering is helpful for lowering the engine but requires lower control arm mods. Front frame rail mods allow a 32 x17" radiator. Same mods are needed to fit the Buick 340 or 350. Alloy heads are available for the 340 and will soon be available for the 350 from TA.

Best bang for the buck? Either the 300 or the stroked 300/350. The 455 really is overkill but with a mild build is amazingly docile yet powerful.

Jim


Phillip G
Phillip Leonard
Kansas City
(395 posts)

Registered:
02/03/2008 04:12PM

Main British Car:
1992 MG RV8 Rover 3.5

Re: What if, Quad valve RV8 ? Not BMW
Posted by: Phillip G
Date: December 22, 2014 11:12AM

I know of no class in SCCA racing that would allow the Quad Valve RV8 cylinder heads.

Intriguing ideal and I'll go right to my latest GCR to see if there is a variant in one of the National classes.

Now I think it might pass muster in one of the many Solo classes.

keep them on the track,

phillip g


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