compression
 

This is a stupid question but I forget how to figure it out.
If I put a compression test on my motor and say the gauge reads 150 or so. how do I get the ratio (example 9 to 1)
Can you help me?

Re:compression
 

I suspect that you will not be able to accurately calculate the mechanical compression ratio of your engine by the means you describe.

Re:compression
 

ok than how do you get the compression ratio?
to run a turbo you cant have over 9 to 1 compression
so how do you get that if you have a 4 cyl running 150 lb each cyl?

Larry

Re:compression
 

Somewhere on here is a link to a comp. finder. it has all hondas, you swap in what you've got: rods, pistons, head, gasket thickness, everything is right there. you just click and it tells you exactly what your motor is running at. I'll look for it . Only thing is it's only got honda oem.

Re:compression
 

Thats know good to me I have a chevy.
Someone in here must know how to get that???
You cant put on a turbo with out knowing this.

Larry

Re:compression
 

http://www.knology.net/~jediklc/D.htm
damn I just found it too...
heres another... turbofast.com, but there you've gotta know bore, stroke, deck height.
search: chevrolet and compression ratio. maybe.
I thought about turboin my monte ls next. big, fast, and guzzlein gas. what size motor?year? You can turbo anything, but a lower ratio is more friendly.

Re:compression
 

to run a turbo you cant have over 9 to 1 compression



uh yeah you can there are plenty of people running turbos with higher c/r s than that

Re:compression
 

to run a turbo you cant have over 9 to 1 compression

NOT TRUE people with integra type R's are running turbo's and they are 11:1!!!!

Re:compression
 

most chevys run 9-10 comp ratio, stock. The comp test you did just lets you know if all of your cylinders are good. no blown rings, head gasket, valve seats, that ----. If all your cylinders came out at 150, at least you know your not leakin anywhere. How much boost are you tryin to run anyway? I wouldn't go above 6-8 on an unbuilt domestic.

Re:compression
 

This winter I'm putting my truck away and going to paint it
and do the motor up. It's a 95 s10 2.2L 80000km I wont go over 10 psi but I need to find the right turbo. witch I dont have a clue. And then that fmu and afc ----, what do I use?
can you help me out?