i have already asked before about this but no one really responded. i just wanted to see where everyones compression is at with similar mods or comp ratios. i calculated my comp ratio and it was like 11.6:1 or something like that.

my ls/vtec mods

- 11.0:1 arias piston
- pr3 head
- ctr cams

did my compressoin test and came out to be

#1 cyl - 235 psi
#2 cyl - 230 psi
#3 cyl - 230 psi
#4 cyl - 230 psi

are they alrite and can you guys tell me if that is were they're suppose to be at?

 

Those are perfect.

 

Sounds pretty healthy!

 

My cousin also got 235 across on his 11.5 compression B18c. The thing is, his motor still burns some oil and he is too lazy to do a leakdown. Can the rings still be the cause even with good compression numbers?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5thgenallmotor &raquo;</TD></TR><TR><TD CLASS="quote">Sounds pretty healthy! </TD></TR></TABLE>

 

heres mines:

270 270 265 265

not too shabby for a motor with 100k+ internally stock.

setup: JDM h22a off an Auto 4th gen prelude, m2b4, AEM CAI, dented up Apex N-1 catback, removed balancer belt.

I let the car warm up to operating temp, pulled out all the spark plugs, then tested at WOT.

did a compression check on my lil bro's d15b7(dx motor) and he got:

215 210 210 215

 

dang, thats pretty high comp #'s for a stock internals. i wonder what your compression ratio is?

another question. could my numbers be lower because i have the intake cam gear set at +1 and exhaust cam gear set at -1?

 

All compression testers read different. Altitude plays a factor as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LsVtec92Hatch &raquo;</TD></TR><TR><TD CLASS="quote">All compression testers read different. Altitude plays a factor as well.</TD></TR></TABLE>

Agreed, focus mainly on the differences between the cylinders.