Compression ratio on B18a1..
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Junior Member
Joined: Aug 2004
Posts: 888
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From: sacramento, ca
Compression ratio on B18a1..
I have aB18a from a 90 teg. I took 2 rounds on C/R and first run i use 2 differnt tester..i used one on cylinder 1 and 2 and 1 on 3 and 4...the second run i use the one from 3 and 4 on all 4 again...
1. 200 2. 190 3. 189 4. 185
2nd run
1. 205 2. 200 3. 197 4. 194
Does this sound about right i mean i know they arent all the same but they didnt leak when i let them sit either so thats good atleast...well then again the cant anyway from the guage...
1. 200 2. 190 3. 189 4. 185
2nd run
1. 205 2. 200 3. 197 4. 194
Does this sound about right i mean i know they arent all the same but they didnt leak when i let them sit either so thats good atleast...well then again the cant anyway from the guage...
Honda-Tech Member
Joined: Jul 2004
Posts: 697
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From: Baltimore, MD, USA
Re: Compression ratio on B18a1.. (tRex99)
alot better than me! but from friends asking what normal is i hear that's right on 
mines
1. 75
2. 75
3. 95
4. 115
hahahahaha thinking the head has bad valves though cause the same thing happened to my rabbit... but my rabbit atleast ran...
mines
1. 75
2. 75
3. 95
4. 115
hahahahaha thinking the head has bad valves though cause the same thing happened to my rabbit... but my rabbit atleast ran...
Member
Joined: Apr 2003
Posts: 1,888
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From: ???????
Re: Compression ratio on B18a1.. (tRex99)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tRex99 »</TD></TR><TR><TD CLASS="quote"> I have aB18a from a 90 teg. I took 2 rounds on C/R and first run i use 2 differnt tester..i used one on cylinder 1 and 2 and 1 on 3 and 4...the second run i use the one from 3 and 4 on all 4 again...
1. 200 2. 190 3. 189 4. 185
2nd run
1. 205 2. 200 3. 197 4. 194
Does this sound about right i mean i know they arent all the same but they didnt leak when i let them sit either so thats good atleast...well then again the cant anyway from the guage...
</TD></TR></TABLE>
that is not compression ratio, that is just called a compression test, its not testing for compression ratio, rather how much PSI each cyclendar can hold. you can use the number to help figure out if there are any significant problems with the motor, and it could help you determine compression ratio but you have to put those numbers into some kind of math equation.
your numbers are fine tho, i have a b18b and im at like 185 apprx straight across.
1. 200 2. 190 3. 189 4. 185
2nd run
1. 205 2. 200 3. 197 4. 194
Does this sound about right i mean i know they arent all the same but they didnt leak when i let them sit either so thats good atleast...well then again the cant anyway from the guage...
</TD></TR></TABLE>
that is not compression ratio, that is just called a compression test, its not testing for compression ratio, rather how much PSI each cyclendar can hold. you can use the number to help figure out if there are any significant problems with the motor, and it could help you determine compression ratio but you have to put those numbers into some kind of math equation.
your numbers are fine tho, i have a b18b and im at like 185 apprx straight across.
Thread Starter
Junior Member
Joined: Aug 2004
Posts: 888
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From: sacramento, ca
Re: Compression ratio on B18a1.. (J337_UNIT)
Yea i know my bad...i know the equation 
but its a pain in the *** and takes me forever, my buddies a math genius so he showed me ...anyway yea i just wanted to know the psi i should be around...i cant get my car to run and nothing adds up anymore...the only thing that could be wrong is something with the dizzy...
but its a pain in the *** and takes me forever, my buddies a math genius so he showed me ...anyway yea i just wanted to know the psi i should be around...i cant get my car to run and nothing adds up anymore...the only thing that could be wrong is something with the dizzy...
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