compression low i got #'s now need answers d-series
09-21-2006, 03:15 PM
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compression low i got #'s now need answers d-series
i did a compression test on a d15b1 today and went 120,120,120,125... but the motor was cold... need to know if this is a bad amount which i think it is cuz my d15b hit 175 but that was a higher compression motor if there is any clue i presheate it... thanks
09-21-2006, 03:22 PM
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cool cuz i got my old d15b head and i want to mini me it w/ my turbo for like a week so just want to c if it will be decent... any more suggestions
09-21-2006, 03:22 PM
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Re: compression low i got #'s now need answers d-series (SinglecamMitch)
i forget what the tolerances were for compression tests, but look in a manual/guide for those numbers.
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09-21-2006, 03:57 PM
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Re: (SinglecamMitch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SinglecamMitch »</TD></TR><TR><TD CLASS="quote">dont got one but ill keep a look out any more suggestions...</TD></TR></TABLE>
Use a search engine such as google or honda-tech's "search" feature to find out what the proper numbers are for that engine.
And don't say you did already. You didn't.
Use a search engine such as google or honda-tech's "search" feature to find out what the proper numbers are for that engine.
And don't say you did already. You didn't.
09-21-2006, 06:09 PM
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Re: (Luserkid)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid »</TD></TR><TR><TD CLASS="quote">Those are super low. Warm up the car and then do it again with WOT. Cold numbers mean nothing. </TD></TR></TABLE>
Blah, although it's true with them all being equal like that, I'm sure it'll balance out fine once he does it when the car is warm.
Blah, although it's true with them all being equal like that, I'm sure it'll balance out fine once he does it when the car is warm.
09-21-2006, 09:52 PM
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Re: (SinglecamMitch)
opening the throttle does nothing on a comp test. those numbers are a lil low but atleast there even across the board. they should be arround 160.
Make sure your compression tester is acurate maybe try another comp tester and see what u get.
also since this is boosted? what is the vaccume at idle on ur boost guage? it should be arround 17-21 inches
Make sure your compression tester is acurate maybe try another comp tester and see what u get.
also since this is boosted? what is the vaccume at idle on ur boost guage? it should be arround 17-21 inches
09-21-2006, 10:22 PM
#16
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Re: (crxhf89)
Do a test WOT and not WOT youll see theres a pretty big difference because when its closed throttle no air goes in so your limited.
I will agree your compression tester may be busted. Also how many turns are you giving the car? Your numbers are directly even with each other and thats not usually signs of a bad motor. Youll find bad motors with 140, 120, 130, 140 something like that but one will be greatly lower then the others. Things you could try if the tester is good to your knowledge is try a valve adjustment.
I will agree your compression tester may be busted. Also how many turns are you giving the car? Your numbers are directly even with each other and thats not usually signs of a bad motor. Youll find bad motors with 140, 120, 130, 140 something like that but one will be greatly lower then the others. Things you could try if the tester is good to your knowledge is try a valve adjustment.
09-22-2006, 05:16 AM
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Re: (crxhf89)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxhf89 »</TD></TR><TR><TD CLASS="quote">opening the throttle does nothing on a comp test. those numbers are a lil low but atleast there even across the board. they should be arround 160.
Make sure your compression tester is acurate maybe try another comp tester and see what u get.
also since this is boosted? what is the vaccume at idle on ur boost guage? it should be arround 17-21 inches</TD></TR></TABLE>
wanna bet?
Make sure your compression tester is acurate maybe try another comp tester and see what u get.
also since this is boosted? what is the vaccume at idle on ur boost guage? it should be arround 17-21 inches</TD></TR></TABLE>
wanna bet?
09-22-2006, 08:03 AM
#19
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Re: (d16racer)
^How the hell do you guys come up with **** like this?
Do the test again and hold the throttle down. I'm not sure what the correct range is for that particular motor, but as long as the numbers are close, you should be good.
Do the test again and hold the throttle down. I'm not sure what the correct range is for that particular motor, but as long as the numbers are close, you should be good.
09-22-2006, 09:24 AM
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my vaccum gauge says bout 17 so i think im good there but with my old motor i remember it was at like 25... also could this mean that my timing has jumped a tooth... it seems very slugish..
09-22-2006, 11:17 AM
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Re: (t0p_sh0tta)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by t0p_sh0tta »</TD></TR><TR><TD CLASS="quote">^How the hell do you guys come up with **** like this?
Do the test again and hold the throttle down. I'm not sure what the correct range is for that particular motor, but as long as the numbers are close, you should be good.</TD></TR></TABLE>
Very true, if they're the same when they're cold then they're all the same when they're high but higher, I wouldn't worry about it. Is your car lower than any other D15B1 on power? I mean ****, if it's boggin out, then yeah, something's fucked up, but if it's fine, don't worry about it. Numbers are close, and if the engine's still fine that's all that matters.
[QUOTE=SinglecamMitch]i presheate it...QUOTE]
And we're suppose to believe that you did the compression test correctly?
Jokes asside, how is the power?
Do the test again and hold the throttle down. I'm not sure what the correct range is for that particular motor, but as long as the numbers are close, you should be good.</TD></TR></TABLE>
Very true, if they're the same when they're cold then they're all the same when they're high but higher, I wouldn't worry about it. Is your car lower than any other D15B1 on power? I mean ****, if it's boggin out, then yeah, something's fucked up, but if it's fine, don't worry about it. Numbers are close, and if the engine's still fine that's all that matters.
[QUOTE=SinglecamMitch]i presheate it...QUOTE]
And we're suppose to believe that you did the compression test correctly?
Jokes asside, how is the power?
09-24-2006, 06:11 PM
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i minime'd the motor and it rips... runs super clean and smooth.... im gunna take some tests on compression and c how badly it drops over the weeks hopefully everthing will turn out good..
