[TR] TR4 Compression Ratio question

[Tony Drews]

Those are good compression numbers.  It's hard to tell things like 
oversized pistons or shaved head from the compression numbers.  If 
they did something like that they may have put in a different cam 
too, and different camshafts can affect the numbers quite a bit by 
the timing of the valve events.

The stock engine is quite torquey.

Tony Drews

At 03:44 PM 7/30/2010, James Henningsen wrote:
>Thanks again for all the reponses on the poweder coating of the steel wheels.
>I had the ten year old tires taken off today, ready to go to the bead blaster
>and found out the rims are TR3 (4 inch width and not 4 1/2).  So if anyone
>needs 4 inch rims, I have four good ones. I still can't believe there were
>P205/75/15s on those 4 inch rims.
>
>The compression readings on my "new" 62 TR4 are 185, 199, 196, 195.  No
>history on the motor except it had a new cam and rocker arm assembly
>installed.  Might have been more but no record and no access to prev owner.
>This car was off the road for almost four years sitting outside.  Got it
>running and it runs well!  How are these numbers compared to fresh engine,
>shaved head for modified use etc.  They seem high to me, but my comparison
>point is a modified TR6 engine and those run mid 170s for a fresh engine.
>Thanks,
>Jim Henningsen
>
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