Compression test results on 8.5:1 CR engine...
09-29-2005, 06:36 PM
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Compression test results on 8.5:1 CR engine...
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!
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!
09-29-2005, 08:53 PM
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Re: Compression test results on 8.5:1 CR engine... (N20civicB18)
the numbers really are not that great, its good that there close together but as far as the number itself there pretty low.
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09-30-2005, 03:55 PM
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Re: (AndyFloyd)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AndyFloyd »</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 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.
09-30-2005, 04:07 PM
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Re: Compression test results on 8.5:1 CR engine... (turbotime)
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
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
10-01-2005, 08:46 AM
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Re: Compression test results on 8.5:1 CR engine... (riceball777)
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...
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