Hello sixers:
After 11 years of owning my '72 TR6, I have just done a compression check. I
measured 155,150,145,150,155 and 150 psi. The problem is,
what should the compression be for a 72? I know the Bentley manual
says that all cylinders should be within 10 psi, and that the compression
ratio for a 72 is 7.75:1.
I found in the archives a formula that states:
cylinder pressure=(compression ratio times 14.7) plus 19.7
Therefore the cyl pressure should be 133.6 psi (?)
Does anyone know the significance of the 19.7 figure? I know that
the 14.7 is atmospheric pressure.
As far as I know, the engine in the car is stock. Thanks in advance
for the help!
Steve
CC75294L
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