Triumph Sports Cars

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

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tr878
David Stevens
Melbourne
(4 posts)

Registered:
11/13/2010 02:31AM

Main British Car:
Tr7 1978 Rover 3.9

Tr7 to V8 Conversion
Posted by: tr878
Date: November 13, 2010 11:10AM

hi I am converting a Tr7 to Rover v8 ,,does anyone know if the engine mount brackets on an SD1 engine are the same as tr8 brackets and do I need a sd1 sump,,
thanks
David


bsa_m21
Martin Rothman
Vancouver, Canada
(216 posts)

Registered:
01/06/2009 11:41AM

Main British Car:
1980 TR7V8 Rover 3.9L

authors avatar
Re: Tr7 to V8 Conversion
Posted by: bsa_m21
Date: November 14, 2010 12:48PM

No and yes.

However, if you are converting your sub-frame yourself, you can accommodate the SD1 engine brackets.
Check out the TR8 section on www.forum.triumphtr7.com and do a search to find pics from others who've some it.

Martin
'80TR7v8


tr8todd
Todd Kishbach

(390 posts)

Registered:
12/04/2009 07:42AM

Main British Car:


Re: Tr7 to V8 Conversion
Posted by: tr8todd
Date: November 15, 2010 04:37PM

You will need the SD1/TR8 sump, unless you are prepared to modify 4.0 sump. The deep portion of the SD1 is smaller in order to clear the subframe. You can modified the 4.0 steel sumps. It requires a little cutting and some welding, but it's not difficult. The SD1 and TR8 engine mounts are different, as are the cradle attachments to the subframe. The TR8 pieces center the engine mounts over the subframe, while the SD1 pieces move the engine either fore or aft(can't remember which). If you are going to modify your TR7 subframe, you could probably get the SD1 engine mounts to work. I recently made up a subframe that used engine mounts from a Buick V6 from the junk yard, bent roll cage tubing, and steel plates. Took about 4 hours to fabricate including making a jig to ensure the engine was located properly.


steveMc
Steve McInerney

(1 posts)

Registered:
01/10/2011 05:02AM

Main British Car:


Re: TR7 to V8 Conversion
Posted by: steveMc
Date: January 18, 2011 04:50AM

Hi , am coverting a TR7 to a V8 with a Rover SD1 V8 doner car . Does anyone know if the engine mounts should be mounted to the front or the rear of the TR8 subframe.


WedgeWorks1
Mike Perkins
Ellicott City, Maryland
(460 posts)

Registered:
07/06/2008 08:07AM

Main British Car:
1980 Triumph TR8 3.5 Litre Rover V8

authors avatar
Re: Tr7 to V8 Conversion
Posted by: WedgeWorks1
Date: January 18, 2011 08:00AM

The original location is behind the mount tab on the TR8 subframe.


tr8todd
Todd Kishbach

(390 posts)

Registered:
12/04/2009 07:42AM

Main British Car:


Re: Tr7 to V8 Conversion
Posted by: tr8todd
Date: January 18, 2011 09:06PM

If you are trying to use a TR7 shifter platform on the Rover five speed, you might be better off having the engine mount tabs in front of the subframe tabs. That way the back of the shifter platform will come closer to actually fitting inside the stock opening in the tranny tunnel. The TR8 shifter and platform are slightly shorter than the TR7 unit. In order to install the tranny mount bracket, you will probably have to redrill the holes in the floor for the captive bolts under the carpet. They just push up into the cockpit of the car. Remeber the SD1 engine brackets are different than the TR8 ones and won't work on a TR8 subframe. You either need TR8 subframe and TR8 engine brackets, or you are in for some serious fabricating.


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