callmefry16

i needed some help from anyone who knows what they are talking about and is absolutely sure about this topic. i am buying a hatch with a b16a3 already in it and the guy has rebuilt it so i wanted to to a compression check. if anyone knows the COMPRESSION NUMBERS for each piston, let me know ASAP. Thanks.

BauleyCivic

There is no "set compression" for motors. As long as all of the cylinders are within 5-10 pts of eachother you'll be fine

TeamNextGenChris

Helm lists a minimum of 140psi,a max of 199psi with a max variation cylinder to cylinder of 28psi.
chris

Mr Hammond

Helms lists somewhere in the 180-200 range for a B16A. So somewhere in that range with about 5pts diff would be good.

callmefry16

what about a b18c1? whats the compression test numbers for that motor?

=GAME=

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callmefry16 &raquo;</TD></TR><TR><TD CLASS="quote">what about a b18c1? whats the compression test numbers for that motor?</TD></TR></TABLE>

same thing.

Del Sol SiR

iTrader: (2)

Also, the B16A3 was factory installed on 94-97 Honda Del Sol VTEC in the US... So you can probably get more info from your local Honda dealer...

Mr Hammond

Actually my helms lists the B18C1/5 in the 200-230 area.

If need be I can go get it from the garage for exact specs on all engines....but damn it's cold out.

TeamNextGenChris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callmefry16 &raquo;</TD></TR><TR><TD CLASS="quote">what about a b18c1? whats the compression test numbers for that motor?</TD></TR></TABLE>
whats listed in my above post is pulled directly from the 94+ Teg Helm manual:
"Helm lists a minimum of 140psi,a max of 199psi with a max variation cylinder to cylinder of 28psi."
chris

callmefry16

well my brother has a 98 GSR and he just recently compression tested his motor and he got 225 for each piston...those numbers seem a little low dont they? i mean, if this motor is puttin these numbers out for a motor that has a 10.0/1 ratio, then shouldnt they be higher for a b16 with a 10.2/1 ratio?

Mr Hammond

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callmefry16 &raquo;</TD></TR><TR><TD CLASS="quote">well my brother has a 98 GSR and he just recently compression tested his motor and he got 225 for each piston...those numbers seem a little low dont they? i mean, if this motor is puttin these numbers out for a motor that has a 10.0/1 ratio, then shouldnt they be higher for a b16 with a 10.2/1 ratio?</TD></TR></TABLE>

Nope.

B16A2-
Standard - 184psi
Minimum - 135psi
Maximum variation between - 28psi

B18B1-
Standard - 199psi
Minimum - 135psi
Maximum variation between - 28psi

B18C1/5-
Standard - 270psi
Minimum - 135psi
Maximum variation between - 28psi

B20B4/Z2-
Standard - 178psi
Minimum - 135psi
Maximum variation between - 28psi

doublejz

hehe, my b16 has had 221 220 221 225, now its 220 220 220 220 i never did understand why mine was so high. It's like higher then a brand new engine outta the factory

Mr Hammond

Mine is actually 225/223/225/223. Stocker internal B16A.

callmefry16

well then...thats what i mean. those numbers seem a little better. im going to compression test it so we will see what numbers come out. the only thing is that if they are at about 180, and your b16 is at 220, should i suspect that it is a piece of **** or what? help me out here guys. i see it like this: the motor is in good condition and the guy says it is flawless, but if your motor is 220 and this b16 is at 180, then im gonna threaten to beat his *** if this motor isnt what he says it is.

TeamNextGenChris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by callmefry16 &raquo;</TD></TR><TR><TD CLASS="quote">well then...thats what i mean. those numbers seem a little better. im going to compression test it so we will see what numbers come out. the only thing is that if they are at about 180, and your b16 is at 220, should i suspect that it is a piece of **** or what? help me out here guys. i see it like this: the motor is in good condition and the guy says it is flawless, but if your motor is 220 and this b16 is at 180, then im gonna threaten to beat his *** if this motor isnt what he says it is. </TD></TR></TABLE>
you can read above what the FACTORY recommended numbers and allowed variance are-if the motor doesn't stack up to them,get mad.what compression reading you get can be affected by what RPM it was tested at,if the cylinder walls were dry,etc.if it meets the factory numbers,you're cool.don't base it on 50 different answers from 50 different people on here-some of them may be wrong.
chris


Modified by TeamNextGenChris at 11:11 PM 1/14/2004

doublejz

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamNextGenChris &raquo;</TD></TR><TR><TD CLASS="quote">
you can read above what the FACTORY recommended numbers and allowed variance are-if the motor doesn't stack up to them,get mad.what compression reading you get can be affected by what RPM it was tested at,if the cylinder walls were dry,etc.if it meets the factory numbers,you're cool.don't base it on what 50 different people on here have gotten-some of them may be wrong.
chris</TD></TR></TABLE>

RIGHT ON!!!

ntensehonda

It's probably higher because they milled the head a bit when they rebuilt the motor. That's going to raise your compression some.

Del_Slowest

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamNextGenChris &raquo;</TD></TR><TR><TD CLASS="quote">
you can read above what the FACTORY recommended numbers and allowed variance are-if the motor doesn't stack up to them,get mad.what compression reading you get can be affected by what RPM it was tested at,if the cylinder walls were dry,etc.if it meets the factory numbers,you're cool.don't base it on 50 different answers from 50 different people on here-some of them may be wrong.
chris


Modified by TeamNextGenChris at 11:11 PM 1/14/2004</TD></TR></TABLE>


What do you mean the RPM that it was tested at. You just unplug the distributer or ECU and crank the engine to the the compression.....why are you talking about the RPM?

TeamNextGenChris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Del_Slowest &raquo;</TD></TR><TR><TD CLASS="quote">


What do you mean the RPM that it was tested at. You just unplug the distributer or ECU and crank the engine to the the compression.....why are you talking about the RPM?</TD></TR></TABLE>
i'ev seen people get compression numbers from motors(for instance in a junkyard) by turning them over by hand.obviously,this can affect the readings.
chris

Mr Hammond

Everyone is doing the test the correct way right? Pulling the F/I fuse from the fuse box under the hood, pulling all plugs and cranking the motor with the accelerator all the way to the floor right aka throttle body wide open?

Del_Slowest

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr Milano &raquo;</TD></TR><TR><TD CLASS="quote">Everyone is doing the test the correct way right? Pulling the F/I fuse from the fuse box under the hood, pulling all plugs and cranking the motor with the accelerator all the way to the floor right aka throttle body wide open?</TD></TR></TABLE>


Yup, thats how i do it. I never thought about some people just cranking it by hand at the junk yards though. Good idea, i'll have to try that and see if it changes my results

callmefry16

well guys...thanks for the help. i test drove it and it was fast as hell for a b16 hatch. the test brought back some suprising numbers though...i think it was like 238 all the way across so the guy wasnt bullshitting me at all. it was this high cuz the head is ported and polished, three angle valve job and its milled..just want to say thanks though and that this whole thing worked out..im pretty stoked to finally be entering the hybrid world with a pretty nice quick little hatch. peace.