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What is the right Compression PSI?

 
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Old 12-11-2012, 08:16 PM
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What is the right Compression PSI?

My mechanic said that the compression on my stock Prelude SH H22a4 came out at about 140-150 on each cylinder and that that's the way the factory made them, is this true? Where should my compression be at?
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Old 12-11-2012, 08:43 PM
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Re: What is the right Compression PSI?

sounds low to me

should be in the 190-225 range for USDM H22's from what i searched

Type S has higher compression so those are 225-240 i believe

are they all close together??? thats almost more important to know...your mechanic's gauge could be off or just crappy..

I just bought a badass Snap-On compression test set because the one i had from NAPA was giving me Waaaaay to low of numbers and almost costed me money because it was wrong ...did a test on a customers 350 chevy and said it was really low....borrowed a friends test set and got good numbers.... realized my gauge was JUNK
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Last edited by EvilBird; 12-11-2012 at 08:50 PM.
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Old 12-11-2012, 10:03 PM
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Re: What is the right Compression PSI?

Quote:
Originally Posted by EvilBird View Post
sounds low to me

should be in the 190-225 range for USDM H22's from what i searched


Unless of course the OP is at elevation
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Originally Posted by Brash View Post
But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 12-11-2012, 10:18 PM
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Re: What is the right Compression PSI?

that's good compression in case you're wondering.

hondatech.info: Honda service manuals
download a manual. see for yourself. the specs are in there with a shload of other trivia like where the dipstick is and how much tranny fluid to have when flushing the system. check it out.
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Old 12-11-2012, 11:27 PM
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Re: What is the right Compression PSI?

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Originally Posted by twokexlv6coupe View Post
Unless of course the OP is at elevation
Well i do live in utah...
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Old 12-11-2012, 11:46 PM
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Re: What is the right Compression PSI?

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Originally Posted by JMoran View Post
Well i do live in utah...


Ding ding dingggg. Perfectly normal.


Air is less dense @ elevation, less dense = lower compression.


This is the perfect example of why its more important to have the numbers be closer together (within ~10%) rather than the highest numbers possible.
If you did a compression test on your car at sea level, it would prolly be in the 180-range.
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2001 Kawasaki STX1100 D.I. - Sold!
2007 Sea-Doo RXT 215; ET 127 +3 S/C impeller, DIY 3" intake, DIY resonator delete/free flow exhaust, DIY oil catch can, Rule 500gph bilge pump


Quote:
Originally Posted by Brash View Post
But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 12-12-2012, 12:41 AM
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Re: What is the right Compression PSI?

Quote:
Originally Posted by bykfixer View Post
that's good compression in case you're wondering.

hondatech.info: Honda service manuals
download a manual. see for yourself. the specs are in there with a shload of other trivia like where the dipstick is and how much tranny fluid to have when flushing the system. check it out.
have this message down on copy and paste yet?
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