[TR] TR cylinder heads

[Andrew Uprichard]

When it comes to the 4-cylinder TR models, I am aware of four variations on
cylinder head design:  the original low-port TR2 head, the "le Mans" head
which was a variation on the low port design, the high port head which came
with most of the TR3s and the TR4 head with the smaller intake aperture.

 

But someone was talking to me the other day about a variation in the high
port TR3 head.  According to this guy, there was a variation in the
thermostat housing, some of which were more sloping than rounded.  He
claimed the sloped design was more attractive as it lended itself to more
shaving and thus a better, high compression engine.

 

I must admit I had never heard about this.  I have three heads sitting in my
barns and all have what appears to be the same, rounded underneath to the
thermostat housing.

 

Has anyone heard of this?

Andrew Uprichard

Jackson, Michigan

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