Triumph Sports Cars

engine swaps and other performance upgrades, plus "factory" V8s (Stag and TR8)

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72 Stag
Stuart Copeland
Vancouver, WA
(8 posts)

Registered:
03/12/2009 12:28PM

Main British Car:
72 Stag Buick 4.2L v6

Stag help please...v6 dying, need help with engine swap
Posted by: 72 Stag
Date: August 07, 2010 09:30PM

My Stag had an old tired '78 buick 231 v6 donated at some time. Now it has what is probably rod-knock and is soon to pass away. I am considering upgrading to a newer, more reliable, less drippy engine. I have a TH350 tranny with both GM and chevy mounting. Considering a small block chevy, maybe a 350. I have absolutely no knowledge of what to look for here or what might be involved. I would appreciate any help you guys might have.


Dan B
Dan Blackwood
South Charleston, WV
(1007 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

authors avatar
Re: Stag help please...v6 dying, need help with engine swap
Posted by: Dan B
Date: August 08, 2010 06:42PM



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: Stag help please...v6 dying, need help with engine swap
Posted by: roverman
Date: August 29, 2010 09:54PM

Stuart, less drippy-more zippy ? All of those features, and more are present in the "later" Buick V6's. No drips, they dumped the "rope" seals front/back. The supercharged engine will have "lot's" of suds, and the 200R4 auto, is well suited for the set-up.Good Luck, roverman.


dadhadaroverp63500s
Richard Harrold

(15 posts)

Registered:
08/31/2010 11:38AM

Main British Car:


Re: Stag help please...v6 dying, need help with engine swap
Posted by: dadhadaroverp63500s
Date: August 31, 2010 11:50AM

Go for the original, wonderful-sounding Triumph V8 if you can get it. They're easily fixed and a good one is perfectly reliable.

Otherwise, use a small all-aluminium V8 (NOT an American iron boat-anchor), like an LS3, or the old Buick/Rover 215 if you can get it. RPI Engineering in Norwich will build you a 'short' or 'long' engine, displacing 3.5, 3.9, 4.6, 5.0, 5.2 or even 5.5 litres, they're pretty damn reliable, and nice and light - but then it would have to be shipped across the Atlantic.

There's been talk of putting BMW or Jaguar V8s (or even the Ford Modular) into Rover P6s (which used the Buick/Rover 215), but I don't know if they'd fit. Mind you, the Triumph has more conventional front suspension, and a fairly wide engine bay.

I know someone in Cali put a Ford 302 pushrod lump into a formerly four-cylinder P6, though.


alana
alan atkinson
10567
(232 posts)

Registered:
06/19/2008 08:06PM

Main British Car:
68 TR250 LS2

authors avatar
Re: Stag help please...v6 dying, need help with engine swap
Posted by: alana
Date: August 31, 2010 01:36PM

D&D will do a 215. You don't have to ship then.


Sparrow010
Andrew Gaskin
New Zealand
(25 posts)

Registered:
06/06/2009 08:04PM

Main British Car:
1974 Triumph Stag Toyota 1 - UZ - FE Quad cam 4.0

authors avatar
Re: Stag help please...v6 dying, need help with engine swap
Posted by: Sparrow010
Date: October 01, 2010 07:33AM

Toyota 1-UZ FE do fit. Wouldn't take your trans though. 32 valve quad cam 4.0 EFI (out of a GS 400)
stag 1-uzfe_DSC_0894.jpg


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