Compression for G13BB engine

Hey guys!
Very nice forum i found here,with good topics! keep up the goodwork!
I own a cabrio jimny with g13bb engine and i didn`t found anywhere the compression rate for this engine,i intend to install a small turbo,without intercooler:) does anyone have specs for this engine?
Thanks!

Thank you very much! After i`ve done some calculations i got 9:1 ratio,should be good for 10psi boost without changing rods and pistons.

If its not a stupid question..... why do you want to turbo a jimny?
Also are you turboing it off the exhaust or electricly? ( probably be easier to use a supercharger setup Id imagine ? )
Just curious
Bert

Littlebear wrote: Thank you very much! After i`ve done some calculations i got 9:1 ratio,should be good for 10psi boost without changing rods and pistons.

Won't that push the pressure up to 340 psi? I would have thought that was a bit much with everything just standard, but I'm certainly no expert.

I do recall that people used to use much thicker head gaskets with turbo'd engines to limit the compression pressure.

I want to turbocharge it because i need extra power to drive 31" wheels,body is heavier now with front,rear steel bumper and exterior rollcage and winch.
It`s easy to install a turbo,i have plenty of space under the bonnet,the only tricky thing will be the exhaust manifold,and maybe the stand-alone ecu if needed.I`ll keep you posted with pictures as soon as i will start turboing,right now they are working on the exterior rollcage:)
Regarding the pressure,will see in tests how much boost can it handle,and if not,forjed pistons and rods:D