Calculate compression ratio?

[pbasil1]

Hey guys. I had th motor re worked, and they took .006" off the head, and none off the block. This equates to ~.16mm which means i would need a new 1.2mm gasket instead of the stock 1.0mm

I was wondering what the compression ratio would be if i were to keep the stock 1.0mm head gasket, instead of buying a thicker 1.2mm gasket. And would it be safe to do this?

Any help would be awesome!

Thanks guys!

 

[suprahero]

I know they have this formula over on www.clubna-t.com but I can't remember where at. I'll see if I have it saved in my favorites.

 

[suprahero]

Try this one Pat.
http://www.csgnetwork.com/compcalc.html

 

[Tanya]

stock 1.0mm?? wat.

Do the 1JZs really come with that thin of a HG from factor or what?

 

[IJ.]

A lot of the more modern engines do with some using really thin steel shim gaskets.

 

[Tanya]

Gotcha, I'm glad I got some edumacation from this thread.

 

[IJ.]

I think as production tolerences improved along with cutter technology the gaskets didn't need to deform as much to fill voids and seal so they got thinner and thinner, the quench/squish is built into the head casting.

 

[nsngarage]

Good stuff to know.. that's crazy small but. w/e works

 

[pbasil1]

i just wanted to conferm for sure... I seem to remember reading that the stock 1jz gasket is 1.0mm, but im not certain. Can someone please confirm this?