Compression tested teh b17 just now, here are my results:

1 - 150psi
2 - 142psi
3 - 150psi
4 - 150psi

think she looks pretty healthy- is that 8psi difference on cyl 2 anything to worry about or is that normal for them to vary a little?

Thanks!

 

its good

 

the numbers really are not that great, its good that there close together but as far as the number itself there pretty low.

 

the engine is 8.5:1 CR man, aka: low compression, so low numbers would be expected.....

 

compression numbers are good. i have about the same on a low compression D16 setup.

 

yeah i cought that later after the post, wooooooops

 

my 8.5:1 is in the 155 range so yeah you are good, and right

 

 

My 8.5:1 measured right around 150, those numbers look fine

 

On my 1.9L Mazda BP engine I have 9.0:1 and get 185psi across the board....does a .5CR drop really lower cylinder pressure that much?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AndyFloyd &raquo;</TD></TR><TR><TD CLASS="quote">On my 1.9L Mazda BP engine I have 9.0:1 and get 185psi across the board....does a .5CR drop really lower cylinder pressure that much?</TD></TR></TABLE>

Compression number results are very comparable from different motors and climates too.

I can get a 30 psi difference on my car just based on how long it cranks, what the weather is like, and how hot the car is. I typically don't even try and compare compression numbers between cars unless somebody has a 12:1 motor pushing 160, or something crazy like that.

 

compression looks good
like ppl said before you really cant compare compression numbers. as long as all 4 cylinders are about the same then your good
my old stock b16 only had 160psi in all 4.
my all motor 11.4cr lsvtec has only 220psi. if i put stock cams in it would jump to 250+psi due to less overlap

 

is that freshly rebuilt. cuz if it is, those are nice numbers. my 10.5:1 LS/VTEC was only 155 across the board, freshly built, now its probably closer to 170-180 but yes, those numbers are definately acceptable...good luck with her in the future...