compression test results

[MRX]

i pull the ecu fuse, no spark or fuel...i wanna see someone admit to not having disabled the fuel

[Granite CB7]

Some people may be forgetting to disable the fuel injectors when they run the test, which will definitely inflate the numbers.

Really? Did not know that, thanks

i pull the ecu fuse, no spark or fuel...i wanna see someone admit to not having disabled the fuel

Good point!

But Antoine, why were your #'s @ 180psi? That's alot! Not to take over at all but here are mine on my F22a6:

Mileage: 92028
Cyl #1: 162 psi
#2: 164 psi
#3: 160 psi
#4: 162 psi

But everyone else's are pretty high as if they have zero mileage or a milled head or higher comp. pistons, yet they don't. I must be missing something or my motor is weak I appreciate the help, it's been on my mind for awhile!

[prodigymb]

Really? Did not know that, thanks

Good point!

But Antoine, why were your #'s @ 180psi? That's alot! Not to take over at all but here are mine on my F22a6:

Mileage: 92028
Cyl #1: 162 psi
#2: 164 psi
#3: 160 psi
#4: 162 psi

But everyone else's are pretty high as if they have zero mileage or a milled head or higher comp. pistons, yet they don't. I must be missing something or my motor is weak I appreciate the help, it's been on my mind for awhile!

180 is good, h22 have even higher i remember we teste my friends lude and it was like 200. also if 178 is normal, then 180 is only 2 psi off which could be accuracy of the guage or just a lil higher then normal. a bad sign is something like this 180-180-180-120 , where one or 2 cylinders are way off but if all are close to each other u shall be fine !

[Clueless]

I got 190-195psi across the board

[starchland]

where did you guys get your compression tester kit?

[ChroNicBoosT]

i got my kit at Autozone for like $30 or sumthin... i read 190psi across the board and i have my head milled 40 thousands over upping compression to around 9.3:1....

[MRX]

Really? Did not know that, thanks

Good point!

But Antoine, why were your #'s @ 180psi? That's alot! Not to take over at all but here are mine on my F22a6:

Mileage: 92028
Cyl #1: 162 psi
#2: 164 psi
#3: 160 psi
#4: 162 psi

But everyone else's are pretty high as if they have zero mileage or a milled head or higher comp. pistons, yet they don't. I must be missing something or my motor is weak I appreciate the help, it's been on my mind for awhile!

could even be carbon build-up making a little more compression...maybe i'll even retest this weekend

[prodigymb]

where did you guys get your compression tester kit?

its not much of a kit lol it basically jsut a pressure gauge. pep boys, auto zone, advanced autoparts e.t.c should carry it 20-30 $

[Gixxerboy56]

compression test results

Man, everyones compression tests seem low to me. Just finished my test on my JDM DOHC F22B. I'm putting the mileage around 75K-80K miles.

#1: 210psi
#2: 210psi
#3: 210psi
#4: 215psi

Procedure: Drove the car for about a 1/2 hour. Pulled ALL the plugs. Had my buddy hold the throttle ALL THE WAY open and work the ignition. I've always let the needle jump 8 times per test to get the most accurate readings between the cylinders. By the 4th or 5th jump of the needle they were all over 200psi(higher than some H22's I've tested). Just seems a little high to me for a F22B. I've done this test about 3 times in the past with the same gauge to my car and it's always been that high. The motor has been boosted for over a year and I beat the hell out of it. The gauge is less than a year old(0-300psi). I bought it off the Snap-On truck and we use it on our all-motor and turbo race motors. Always been accurate when it came to finding a problem with a motor. Is this odd, normal, or am I lucky? I think the C/R is around 9.6:1-9.8:1.

[91accordwagon]

Man, everyones compression tests seem low to me. Just finished my test on my JDM DOHC F22B. I'm putting the mileage around 75K-80K miles.

#1: 210psi
#2: 210psi
#3: 210psi
#4: 215psi

Procedure: Drove the car for about a 1/2 hour. Pulled ALL the plugs. Had my buddy hold the throttle ALL THE WAY open and work the ignition. I've always let the needle jump 8 times per test to get the most accurate readings between the cylinders. By the 4th or 5th jump of the needle they were all over 200psi(higher than some H22's I've tested). Just seems a little high to me for a F22B. I've done this test about 3 times in the past with the same gauge to my car and it's always been that high. The motor has been boosted for over a year and I beat the hell out of it. The gauge is less than a year old(0-300psi). I bought it off the Snap-On truck and we use it on our all-motor and turbo race motors. Always been accurate when it came to finding a problem with a motor. Is this odd, normal, or am I lucky? I think the C/R is around 9.6:1-9.8:1.

And you'd be right it is high Should be sitting around 150 with a difference of no more than 20% from the lowest reading to the highest reading. High readings = carbon build up. Which is typical so it's really nothing to be hugely worried about you can try to do a carbon burn which is always exciting (you can buy the stuff from any local parts store) or not do anything about it (which is what I would do) Alot of times that carbon can be sealing more serious problems.

[MRX]

And you'd be right it is high Should be sitting around 150 with a difference of no more than 20% from the lowest reading to the highest reading. High readings = carbon build up. Which is typical so it's really nothing to be hugely worried about you can try to do a carbon burn which is always exciting (you can buy the stuff from any local parts store) or not do anything about it (which is what I would do) Alot of times that carbon can be sealing more serious problems.

naw, its a DOHC f22b, they have about 9.5:1 compression which is about 190-210psi on the compression gauge. If it was any lower then he'd have problems. He's perfectly fine, a tiny bit higher than the 200-205 i normally see but nothing to write home about.

[HondaFan81]

According to:

http://****.com/uploads/CB7Tuner%20F...ine%20list.mht

The JDM F22B is 9.2 CR

[MRX]

But how can the smaller engine have just about the same hp ratings with less compression and bore than the h23? Doesn't make sense.

[KillerCam282]

But how can the smaller engine have just about the same hp ratings with less compression and bore than the h23? Doesn't make sense.

EDIT: I am not so sure right now but my guess would be hotter cams. I had to mill my head for that 9.5 CR.

[Granite CB7]

i read 190psi across the board and i have my head milled 40 thousands over upping compression to around 9.3:1....

I MUST be missing something, Rob^ has a good reason for higher #'s out of his F22a, the milled head. I'm trying to understand why everyone's F22a #'s (w/ 8.8:1 CR)are so high when brand new they'd put out at most about 180psi, 178 being standard.

I got 190-195psi across the board

I'm just not getting why Caleb's #'s are a good 10-15psi greater than standard #'s I know he has the F22a and stock compression I believe