Compression of RB20DET

[S13 Silvia]

What are the stock compression figures for the R32 GTS-T RB20DET? I'm after the psi figure not the ratio. And if anyone's knows what the workshop manual specifies as the minimum acceptable psi and the minimum acceptable difference between cylinder's is, that would be good as well.

Cheers

[Warpspeed]

Would not know the official figures for your engine, but a lot depends on how you actually measure it, for example engine hot or cold? At full throttle, or just turn the key? How fast is the engine going to crank, is your battery o/k? All plugs out, or only the one you are measuring, this effects cranking speed a fair bit. I would measure each cylinder and if they are all almost all the same, do not worry about it, whatever the actual readings turn out to be.

For a variety of reasons there is no direct relationship between compression ratio and the measured cranking pressure. Things like valve timing, engine temperature, and cranking speed have a large effect. Also your compression gauge may be way out if it is a cheapie. If every pot is similar that is all you realy need to know.

If one or more pots are far less than the rest, then try to figure out why and fix it.

[MegaGTS4]

According to this link 140psi (approx)

http://www.skylinegts.co.uk/Project_R32.htm

MEGA