what are good numbers for a b18c1 motor??

thanks and apologize in advance for stupid questions

-ian

 

if you do a search there is a whole topic with several pages of peoples compression numbers.

some say 230 is good, others 190. usually as long as all cylinders are putting out the same your good. but say your test comes out 180 230 230 230. then somethings up with cyl 1. could be rings, valves ect. there are several other tests if you have to go that far.

If one cylinder is alot lower than others try putting about a cap full of oil down the spark plug hole then retest. if your numbers go up, more than likely its your rings.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spidy3 &raquo;</TD></TR><TR><TD CLASS="quote">if you do a search there is a whole topic with several pages of peoples compression numbers.

some say 230 is good, others 190. usually as long as all cylinders are putting out the same your good. but say your test comes out 180 230 230 230. then somethings up with cyl 1. could be rings, valves ect. there are several other tests if you have to go that far.

If one cylinder is alot lower than others try putting about a cap full of oil down the spark plug hole then retest. if your numbers go up, more than likely its your rings.</TD></TR></TABLE>

aight thanks for the help...

 

hey i got another noob question real quick...

what if i wanna turbo my car...what kinda compression should i be looking for??

after putting in new internals

 

if you are going to put all new internals in your engine and plan on installing a turbo you will want the compression ratio to be lower for more boost and higher for less boost.

example(dont go by my exact numbers):
if your compression ratio is 9.8:1 you can safely run 15psi of boost
if your compression ration is 11.8:1 you can safely run 7psi of boost.

The higher your CR (compression ratio) is the touchier your car will be for running and tuning wise when you add boost. Id just do some searching and find out what kind of turbo setup you want to get and see how alot of people have that type of setup and it should help you out. and remember, if you are going to spend alot of money rebuilding and building up your engine you need to factor in getting it tuned, the most imported part when modding your engine!


*side note- Im not real familiar with hondas yet (had one for about 8 months now) but I do have decent knowledge on cars and have done alot of things to my talon that I have had for 4 years.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spidy3 &raquo;</TD></TR><TR><TD CLASS="quote">if you are going to put all new internals in your engine and plan on installing a turbo you will want the compression ratio to be lower for more boost and higher for less boost.

example(dont go by my exact numbers):
if your compression ratio is 9.8:1 you can safely run 15psi of boost
if your compression ration is 11.8:1 you can safely run 7psi of boost.

The higher your CR (compression ratio) is the touchier your car will be for running and tuning wise when you add boost. Id just do some searching and find out what kind of turbo setup you want to get and see how alot of people have that type of setup and it should help you out. and remember, if you are going to spend alot of money rebuilding and building up your engine you need to factor in getting it tuned, the most imported part when modding your engine!


*side note- Im not real familiar with hondas yet (had one for about 8 months now) but I do have decent knowledge on cars and have done alot of things to my talon that I have had for 4 years.

</TD></TR></TABLE>

aight say i put low compression pistons in my block...how will i know my compression changes...or in other words...how can i check to see how much my compression went down??

 

http://www.zealautowerks.com/

that should give you the info you need and mite help with what setup you want

 

What are the factory specs for a compression test?
On the B18B1, the cylinder pressure must not exceed 199psi or be any lower than 135psi.
On the B18C1/B18C5, the cylinder pressure must not exceed 270psi or be any lower than 135psi.
On all three engines, there must not be any variation greater than 28psi between any cylinders.

http://www.team-integra.net/se...=1086