ETCG made a somewhat recent video on this. I find that most people hear of pouring water in the intake of an engine and think it sounds absolutely insane.
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For the most part you all have caught on without this post, but there have been a few habitual offenders that forced me to say this.
Everyone will get a couple of warnings from here on out, after that I just start deleting threads.
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Please Help, Compression Woes..
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Taking from a text sent to a friend.
Last yrs it was 190 190 190 210 dry
When we did it last week when car wasn't starting it was 180 180 110 150
When I did it today I had the gas pedal down and I got 190 190 200 and 200.... with foot not on pedal I got 185 185 185 185
Perhaps since my battery was dyin the other day it didn't get full crank. I did each test today 4 times per cylnder.. 2 holdin gas 2 times not holding gas... and I also did the water thing.. the car was warm enough. Held it at 2500rpm sprayed mist intside throttle. And nothing really happened. I was doin it for 15mins. Then after that I did the dry test. I didn't do wet cuz my #s we good.
I was told by a good honda guy who deals with accords that the motor is healthy.**Blk Housed Slut Crew Member #1**
**Don't b scared be prepared for the worst**
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Originally posted by F20A CB7 View PostPerhaps since my battery was dyin the other day it didn't get full crank.
The pistons rings leak, even when in good condition (which is why pressures are somewhat higher for a 'wet' compression test, even with a 'good' cylinder). The more slowly the piston rises the more leakage occurs, so the lower the compression psi.
And;
As the gas (air) is quickly compressed it gets a lot hotter, so it expands (or tries to). Of course it's being forcibly compressed, so this manifests as raised pressure rather than as greater volume. This is additional pressure rise added to the pressure increase caused by the cylinder volume decreasing and forcing X gas quantity into a smaller space. The more slowly the piston rises the more slowly the gas is compressed and the less hot it gets (the same heat is generated in the gas for the same degree of compression, but there is more time for it to be cooled by the resulting heat radiating and conducting into the metal), so there is less 'expansion' and less heat related pressure increase.
You may also get more gas expelled back out of still partially open valves (as the piston begins to ascend) when cranking more slowly compared to cranking more quickly.
Originally posted by F20A CB7 View PostI also did the water thing.. the car was warm enough. Held it at 2500rpm sprayed mist intside throttle. And nothing really happened. I was doin it for 15mins.
Originally posted by F20A CB7 View PostI was told by a good honda guy who deals with accords that the motor is healthy.Last edited by johnl; 12-14-2014, 10:59 PM.Regards from Oz,
John.
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I appreciates everyones help. Thanks u. 4 real!**Blk Housed Slut Crew Member #1**
**Don't b scared be prepared for the worst**
Da Drizzle's Sedan - Dr. Diy's Blk Housed Thread
'90 2Tone Coupe-Car Heaven_'89 Lude-Junk Yard
Mostly Usdm, some Jdm,Edm,&Puerto Rican RICE
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Originally posted by H311RA151N View PostETCG made a somewhat recent video on this. I find that most people hear of pouring water in the intake of an engine and think it sounds absolutely insane.
What makes me laugh about forums, is that no matter how much you try to help someone, they dont take the advice. Go ahead and do it the hard way.
You got to respect what you drive, and appreciate what you have, making the best of what you got. and if that means putting CAI, HID's, a phat stereo system, and a idiot in the drivers seat...then so be it!
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Well thank goodness this worked out well. 185 in all cylinders is awesome!*** Think of others before thinking of yourself. ***
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