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Re: TR3a/TR8

To: clauded@seanet.com (Claude Dennis)
Subject: Re: TR3a/TR8
From: Jeff Foster <jfoster@bcl.net>
Date: Thu, 5 Oct 95 09:49:26 -0500
Cc: triumphs@autox.team.net
Back on 9/10/95 , you wrote:
>I think your notion of the TR8 engine in the 3a may work.
>
>The Rover V-8 will weigh about the same as the TR3 engine so
>balance shouldn't be affected.
>
>You will have problems with the exhaust system and I would suggest
>that you consider welding up a set of tube headers.  By the way, these are
>really fun to do - no kidding.  You should be able to pick up a set
>of flanges and the other required plumbing bits at a speed shop.  With
>an Edelbrock mainfold and a small Holley four barrel, you should
>be around 180 hp.

Do you know what the hp rating was on the early TR3 motors was?

>The best way to start is to get the engine and 5 speed tranny and dunk
>it in to see what you will need to cut away.  Fender wells will
>probably need modification for the exhaust and the transmission
>tunnel will also need bashing.  Since, as I recall, the driveline
>goes through the frame crossmember, this may cause trouble because 
>you won't have room to adjust engine height or angle.
>
>Driveshaft is a snap.  Measure it up and take the TR8 and TR3 
>shafts to a driveline shop and ask them to glue one to the other
>with the correct length.
>
>I would use the TR3 electrics and just make a custom mount for
>the TR3 generator.

Will probably convert to a negative ground system so as to install a sound
system, although if any vehicle is fun enough to drive you simply don't need
one - had an Opel GT for awhile some years ago and I mostly used the radio
only when someone else was riding along; or as backgroung music when parked
but I was young & single, that's a different story 8^) !

>I think the stock rear end should handle the extra power.

That's good to hear. Any thoughts as to the gearing ratios involved?

>Cooling may be another problem.  An oversize radiator core
>and an electric fan would be my choices if I had problems in that
>area.

Wouldn't imagine any other way!

>In summary,  any engine swap has to confront a number of issues,
>these are:
>
>1.  Weight differences.  You are OK here.
>2.  Ability of other components to handle power.   Rear end should be OK.
>3.  Exhaust system.  This will be ugly.
>4.  Will it fit?   Hell, if you are serious, you can fit anything
>                   into anything.

Yep! ;)

>5.  Electrics.  No problem.
>6.  Cooling.  Unknown but probably will be marginal at best.
>7.  Driveline.  No problem.
>
>Have fun and keep me posted.  By the way, the MGAs worked quite
>well and the Buick engine was 40 pounds lighter than the MGA lump.

Sounds like a nice setup indeed! Any under-the-hood pictures?


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