usdm b16 compression?◙?
08-24-2007, 07:30 PM
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usdm b16 compression?◙?
hey, i have a 98 canadian si (ex us) with a 99 b16a2 usdm swap in it what should the compresion be in Psi? i'm doing a compresion test tomorow to see how things are i'm blowing a **** load of black smoke when i'm hammered down and seems to be getting worse and now i'm being told theres some blue in it too not a good thing i'm going to try and baby it till i have my cash and build my b20 vtec hopefully start building in 3-4 weeks just gotta wait for a check to come in from the insurance company. also anyone know the running temp of the stock cat?? i'm thinking it might be plugged from the rich a/f mixture in vtec. the a/f is good till about 5 gs then goes rich so i dont know rings maybe? or just a sensor gone it started smoking like 6 months ago only getting bad 2-3 weeks ago. i did run a bottle of nitrous threw it last summer so possible fired rings??? the engine has about 130,000 kms on it
08-24-2007, 07:59 PM
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Re: usdm b16 compression?◙? (98greensi)
~170-220 across the board I think. And all within 20 of one another.
It's supposed to be 10% of one another, but being around 200 it should be ~20 anyway.
It's supposed to be 10% of one another, but being around 200 it should be ~20 anyway.
08-24-2007, 08:33 PM
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Re: usdm b16 compression?◙? (98greensi)
just to help your test, make sure to do a dry and wet compression test. the wet compression test consisit of putting just a few squirts of oil in spark plug hole and when you do the test if your numbers change drasticly then you know its your rings cause now the oil has helped seal the compression rings to make better numbers just dont put to much in there and always do your dry test first.
08-24-2007, 09:01 PM
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Re: usdm b16 compression?◙? (gsrhatch2356)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrhatch2356 »</TD></TR><TR><TD CLASS="quote">just to help your test, make sure to do a dry and wet compression test. the wet compression test consisit of putting just a few squirts of oil in spark plug hole and when you do the test if your numbers change drasticly then you know its your rings cause now the oil has helped seal the compression rings to make better numbers just dont put to much in there and always do your dry test first.</TD></TR></TABLE>
to do a wet compression only if dry compression is low, otherwise no need for the wet compression test, wet compression test on a normal engine wont be normal at gauge reading
to do a wet compression only if dry compression is low, otherwise no need for the wet compression test, wet compression test on a normal engine wont be normal at gauge reading
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