What should the compression be on a 69 T
 

I did a compression test on my 1969 911, its still the 2.0L T as far as I know but it was rebuilt sometime in the past . It still has biral cylinders ( I think thats what they are since the have a little surface rust. There not like the aluminum "S" cylinders) .

The compression was around 150psi . It seems a bit high for a T, it has me wondering if maybe it has high compression pistons installed.

Anybody know what a stock 69 T compression should be.

thanks :)

There are a lot of things that affect the reading you get from a compression test, ie cam profile, temperature, atmospheric pressure. the tool itself is usually not consistent to other tools either, so comparing readings from different cars on different days is not very meaningful. the main thing is that there are no low values relative to the highest.

not sure how you can determine what pistons you have. good luck