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Similarity between 1850 and Triumph Stag cylinder heads.
Posted: Wed Mar 04, 2020 6:01 pm
by MIG Wielder
Are the Stag cylinder heads basically the same as the 1850 ?
The valve gear looks identical; the inlet manifolding looks a bit different as does the exhaust manifolding. But I understand the basic casting is the same; or is that info wrong ?
Thanks very much,
Tony.
Re: Similarity between 1850 and Triumph Stag cylinder heads.
Posted: Wed Mar 04, 2020 8:32 pm
by new to this
Tony
The casting numbers are different,and theres a bigger gap where the timing chain goes on the Stag head,also think the water transfer housings at the back of the head are different
Dave
Re: Similarity between 1850 and Triumph Stag cylinder heads.
Posted: Fri Mar 06, 2020 5:06 pm
by MIG Wielder
Ah ... Thanks Dave. I was reading that the SOC is thinking of remaking Stag cylinder heads and I was wondering how much compatibility there was.
Still a few 1850 heads around I reckon.
Tony.
Re: Similarity between 1850 and Triumph Stag cylinder heads.
Posted: Fri Mar 06, 2020 8:51 pm
by new to this
It would be interesting to know if the 1850 head would fit a Tr7 and vice verser
Dave
Re: Similarity between 1850 and Triumph Stag cylinder heads.
Posted: Fri Mar 06, 2020 11:40 pm
by soe8m
new to this wrote:
It would be interesting to know if the 1850 head would fit a Tr7 and vice verser
Dave
Physically yes. The difference is the combustion chamber size. A tr7 head on an 1850 gives a very low compression engine and vice versa gives an high compression engine. I'm not sure a tr7 head will fit an 1850 headgasket/bore wise.
Jeroen