[TR] TR cylinder heads

[Jerry Van Vlack]

I believe it had more to do with interference with water pumps when shaving a head.
JVV

From: Andrew Uprichard 
Sent: Monday, November 26, 2018 2:14 PM
To: triumphs at autox.team.net 
Subject: [TR] TR cylinder heads

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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