malbaby Posted November 17, 2012 Share Posted November 17, 2012 Please advise what is required to successfully install a 2500 triumph engine and gearbox into a TR4. Quote Link to comment Share on other sites More sharing options...
ahebron Posted December 12, 2012 Share Posted December 12, 2012 A TR5 ;DAdrian Quote Link to comment Share on other sites More sharing options...
Richard B Posted December 12, 2012 Share Posted December 12, 2012 I remember reading that it is easier to turn a TR6 into a TR5, than a TR4 into a TR5. Quote Link to comment Share on other sites More sharing options...
Jason Posted December 12, 2012 Share Posted December 12, 2012 Richard_B wrote:I remember reading that it is easier to turn a TR6 into a TR5, than a TR4 into a TR5.I think you need an early 6 and change the exterior panels for 4/5 ones - so easier to "downgrade" a 6 than "upgrade" a 4 Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted December 12, 2012 Share Posted December 12, 2012 Jason wrote:I think you need an early 6 and change the exterior panels for 4/5 ones - so easier to "downgrade" a 6 than "upgrade" a 4May not be much help if you already have a TR4 though?Nick Quote Link to comment Share on other sites More sharing options...
mikeyb Posted December 13, 2012 Share Posted December 13, 2012 I'm reading the original question a little differently. I think that the OP is asking what needs to be done to upgrade his Tr4 4-pot to a 6-pot - not recreate a TR5? :-/ Quote Link to comment Share on other sites More sharing options...
ahebron Posted December 28, 2012 Share Posted December 28, 2012 MikeyB wrote:I'm reading the original question a little differently. I think that the OP is asking what needs to be done to upgrade his Tr4 4-pot to a 6-pot - not recreate a TR5? :-/Excuse my ignorance but is that what a TR250/TR5 is?Adrian Quote Link to comment Share on other sites More sharing options...
ferny Posted December 28, 2012 Share Posted December 28, 2012 A TR250 is an American TR5, but with carbs instead of injection to reduce the emissions. They sold the TR6 there though, so did they ever sell a "proper" 5 there? Quote Link to comment Share on other sites More sharing options...
Andy Flexney Posted December 28, 2012 Share Posted December 28, 2012 Ferny,the TR6 was also on carbs, the engine only produced about 100 BHP and is not a lot of fun to drive.I have heard stories of a TR5 in California apparently it is the one Triumph sent across for all the testing and after it failed they never bothered bringing it back. I think it was then imported privately therefore was not subject to the same testing.Can anyone put any light on this?AndyF Quote Link to comment Share on other sites More sharing options...
mikeyb Posted December 28, 2012 Share Posted December 28, 2012 pretty sure Kas Kastner had one out there? Or possibly it was a 250 . . . Quote Link to comment Share on other sites More sharing options...
69vitesse Posted January 23, 2013 Share Posted January 23, 2013 The TR4 with the 6, aka the TR250.Even in its gutless US form not too bad a car and doesn't give away too much real world performance to a PI TR6, its got a surprsing amount of torque.With a hotter Vitesse cam, the twin outlet cast manifold and a decent compression ratio, it would be good for 125-135bhp and be quite spritely. Quote Link to comment Share on other sites More sharing options...
Richard B Posted January 29, 2013 Share Posted January 29, 2013 Read John Macarthys book 'In the footsteps of my father", someone used to ship TR5's back to the states as personal imports ;D Quote Link to comment Share on other sites More sharing options...
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