Your numbers are way low.
On my 67 1275 (worn out) I measured numbers between 150 and 180psi with
two different gauges.
1) Did you test hot? Cold numbers can be much lower.
2) Did you have the carbs blocked open?
3) Is your gauge off? You could test it on a newer known good engine.
Ulix
On Wed, 27 Jan 1999, Justin Cook wrote:
> What is a healthy number (compression) for a 1275 engine? I'm
> GUESSING it might be calculated (assuming compression ratio of 8, 14
> psi for 1 atm)
>
> ideal = (8*14)-14 = 98 psi
>
> (please comment if you know better than I do...)
>
> After testing my motor, I only had 80-85 psi. Is that reasonable?
>
> Thanks,
> Justin
>
>
Ulix __/__,__ ___/__|\__
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'67 Sprite '74 X1/9
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