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Club Triumph - Cars - TR2-6
TR2-6

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Club Triumph forum - Cars - TR2-6 - Unleaded fuel and Tr6 engine
< Can one fit a J type overdrive box from a Saloon straight into a TR6? Unleaded fuel and Tr6 engine
"GiuliaReis"
posts: 4
non member
 posted Wed 18th Jan 2012

I;m new in the Triump world, but can the TR6 enginge handle unleaded fuel Ron95 or 98?
Im looking for a TR6, TR4 is  probably not a outcome for me (budget).

There is  a nice racing green TR6 available,US California car with carburettors(or carburettersCommonwealth style  ;)). Does this these engines has less hp then the European cars?
Any documetation of this subject (www link, books~to read?)

regards Rob
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"thescrapman"
posts: 9130
Essex group
joined on Sat 17th Sep 2005
 posted Wed 18th Jan 2012 reply 1 of 4

Yes is the simple answer, you will get many years service just running on unleaded. The heads have excellent "lead memory". The first casualities seem to have been Mk1 2000 engines, and a few very hard driven Mk2's.

They much prefer 98 (or 99) to 95 though.

Only thing to remember is that any work on teh head will then require harder seats as you will loose that memory.

A US car on carbs has 100-odd bhp, a UK car on PI has 150 (CP aand measure in old type hp) or 125 (CR and new type HP)

Have a good search through the archives on here, and ask lots of questions.

Cheers

Colin

Schadenfreude expert and collector of assorted rusty Triumphs on the Essex/Suffolk Border.

2010, 2011, 2013, 2015 and 2016 CT Navigators Championship winner.

10CR 2005, 2007, 2009, 2011, 2013, 2017 - RBRR 1990, 2006, 2008, 2010, 2012, 2014, 2016, 2018 - Nachtrit 2006, 2007, 2008, 2009, 2012 - Chinese rally 2007, 2008, 2009, 2010, 2011 - HCR 2009, 2011, 2012, 2013 (3rd place), 2014. 2015, 2017

On the road.
1968 Spitfire Mk3 : 1973 TR6 : 1967 Herald 1200 Estate : 1968 Mk1 2.5PI : 1970 Mk2 2000 MOD
Off the road
1967 Moss Monaco (Mk1 GT6 based) : 1970 Spitfire Mk4 : 1970 Mk2 2000 auto  : 1964 Mk1 2000  : Mk2 2.5PI : 1971 Herald 13/60 Conv
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"GiuliaReis"
posts: 4
non member
 posted Fri 20th Jan 2012 reply 2 of 4

Thanks, Colin.

The US cars  has less compression (so other engine) or is the only the change of the carbs?

Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"thescrapman"
posts: 9130
Essex group
joined on Sat 17th Sep 2005
 posted Fri 20th Jan 2012 reply 3 of 4

yes to lower compression I am sure.

There are alos some heads that are US only having different port spacings

Cheers

Colin

Schadenfreude expert and collector of assorted rusty Triumphs on the Essex/Suffolk Border.

2010, 2011, 2013, 2015 and 2016 CT Navigators Championship winner.

10CR 2005, 2007, 2009, 2011, 2013, 2017 - RBRR 1990, 2006, 2008, 2010, 2012, 2014, 2016, 2018 - Nachtrit 2006, 2007, 2008, 2009, 2012 - Chinese rally 2007, 2008, 2009, 2010, 2011 - HCR 2009, 2011, 2012, 2013 (3rd place), 2014. 2015, 2017

On the road.
1968 Spitfire Mk3 : 1973 TR6 : 1967 Herald 1200 Estate : 1968 Mk1 2.5PI : 1970 Mk2 2000 MOD
Off the road
1967 Moss Monaco (Mk1 GT6 based) : 1970 Spitfire Mk4 : 1970 Mk2 2000 auto  : 1964 Mk1 2000  : Mk2 2.5PI : 1971 Herald 13/60 Conv
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"BiTurbo228"
posts: 871
non member
 posted Thu 10th Apr 2014 reply 4 of 4

thescrapman wrote:
A US car on carbs has 100-odd bhp, a UK car on PI has 150 (CP aand measure in old type hp) or 125 (CR and new type HP)

Have a good search through the archives on here, and ask lots of questions.

Cheers

Colin


I've heard that the net hp of an early PI engine is somewhere around 141bhp. Not sure where that number came from though.

 Current fleet:
1974 Triumph Spitfire 6 project
1973 Triumph Spitfire Slant 4 pre-project
1978 Triumph Spitfire (not sure of the plan yet)
1992 Jaguar XJ40 4.0l manual
1989 Jaguar XJ40 3.6 (parts car, squashed by a tree)
1999 Alfa 156 V6
1992 Citroen BX 19 TXD
1996 Lada Niva
1998 MG F VVT
1972 MG B GT (will be a Baja B eventually)
1987 Fiat X1/9 Uno Turbo
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6


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