12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

compression ratio??

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Old 06-11-2005, 08:00 AM
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compression ratio??

Does anyone know what the compression ratio is for my truck or where I can find that kind of info? thanks guys
Old 06-11-2005, 08:25 AM
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Look around on this site. Click the 2nd generation 12 valve and go from there. That is a very good site, with lots of information.
http://www.dodgeram.org/support_pgs/diesel_ix.htm
Old 06-11-2005, 08:27 AM
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Compression Ratio: 17.5:1
Old 06-11-2005, 06:07 PM
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ok thank you
Old 06-11-2005, 08:13 PM
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You may already know this, but what I find amazing is that at 17.5 to 1 compression ratio , times 20 psi boost. It's incredible that these engines will last 100's of thousands of miles at that pressure.
Old 06-11-2005, 10:16 PM
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Yeah, since alot of us see 20psi at 30 mph. Amazing mine holds at 33psi
Old 06-11-2005, 11:11 PM
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They'll hold about 52psi reliably, now that is amazing at 17.5:1!!

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Old 06-11-2005, 11:14 PM
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And all that pressure is before the fuel injection event.
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