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Old 06-14-2001, 11:36 AM   #1
wop
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Member#: 1931
Join Date: Jul 2000
Location: orange, ca
Vehicle:
2000 00 impreza 2.2l
wagon

Post what is the compression ratio on a...

...stock MY99 EJ25?

thanks,

-wop
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Old 06-14-2001, 11:57 AM   #2
25psi
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Do not quote me on that one but i belive it is 9.5:1.

Eugene
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Old 06-14-2001, 02:46 PM   #3
wop
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Quote:
EDIT--and that's because I have a MY00 not MY99, yes I am a moron...
HAHAHAHAHAHA... no your not.

thanks guys I will go with 9.7:1

-wop
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Old 06-14-2001, 05:04 PM   #4
Kevin Thomas
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Location: 1997 OBS, 1996 SVX, 1988 RX
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What makes the '99 2.2L motor a 10.0:1 compression ratio? My '97 2.2L is a 9.7:1 compression ratio. If I wanted the same compression ratio as the '99 2.2L, what changes would I have to do? Change the gasket, pistons, both? Thanks!

I was wondering how the '99 gained a little more horsepower and torque.
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Old 06-14-2001, 10:20 PM   #5
SubyTechMaster
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Without comparing part #s I'm not sure about the pistons, but the '99 is a Phase II (camcase design, much larger valves). I'll have both motors apart next week and I'll try to take some pics of the differances.
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Old 06-15-2001, 12:13 AM   #6
ColinL
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9.7:1
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Old 06-15-2001, 12:17 AM   #7
donjuan
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My owners manual says 10:1.

EDIT--and that's because I have a MY00 not MY99, yes I am a moron...

[ June 14, 2001: Message edited by: donjuan ]
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Old 06-15-2001, 12:24 AM   #8
SubyTechMaster
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'99 - 2.2L = 10.0/1
'99 - 2.5L = 9.7/1
2000 - 2.5L = 10.0/1
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Old 06-15-2001, 02:14 AM   #9
bill harvey
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kevin i think it is the head design.
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Old 06-15-2001, 05:34 AM   #10
Gambit
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wow bill harvey is member #11!!! wow!
why did MY2000 CR jumped to 10:1?
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