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Old 01-17-2001, 05:50 AM   #1
96Lconversion
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Post 00 2.2L vs. 96 2.2L, where'd the power come from?

Does anybody know what they did to the newer 2.2L engine to give it more power? ANYBODY PLEASE? Cuz my engine in my 96 has 135hp and 142 lb/ft, but the new one has 142hp and 149 lb/ft, a significant increase. It's not fair, I want that extra power too! If anybody knows about it let me know, PLEASE!
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Old 01-17-2001, 08:34 AM   #2
96Lconversion
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Maybe a dealer could give me some info about this? Any out there?
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Old 01-17-2001, 08:43 AM   #3
yebokmj
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I would guess it just came from some general refinement. When in 99 they changed to the SOHC for the 2.5 they spent a lot of time refining and tuning the engine to be more efficent and to have more torque. I would guess that alot of this research and developement carried over to the 2.2 therefore exsplaining the power and torque increase.
Joshua
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Old 01-17-2001, 08:45 AM   #4
rpone605
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do you the 00 2.2L use a map instead of the maf like the 2.5RS motor??

this could be another reason for the hp jump.
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Old 01-17-2001, 08:59 AM   #5
efoo
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MAF vs. MAP has nothing to do with the hp increase - it's all about fine-tuning. years of development and tweaking with the engine management, intakes, and exhaust and produce lots of gains. just witness the nissan maxima 20th anniversary edition. 5 hp just mysteriously "appeared" on that car, and it's pretty much the same engine-wise as any other maxima!

-Edwin
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Old 01-17-2001, 09:06 AM   #6
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Wasn't there a disscussion about this a couple of weeks back when people were asking about headers? MY97 (I believe) is where the 2.2 got the slight bumo in power. There was the same year that Subaru went with two exhaust ports per head, instead of one big one. I think I'm right.

Jim
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Old 01-17-2001, 09:07 AM   #7
Gambit
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Starting 99, all 2.2l are SOHC phase II engines like the 2.5l. So it's tuned for more hp. And also it's twice the power at part throttle compared to the DOHC engines. Yay!!!
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Old 01-17-2001, 09:28 AM   #8
Temple
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Information pulled from Subaru literature

my96: 4 cyl. boxer, sequential multi-port fuel injected, distributorless ignition
16 valve SOHC
1.8L: 110 hp, 110 torque@4400rpm
2.2L: 135 hp, 140 torque@4400rpm

my97: 1.8L 4 cyl 16 valve SOHC boxer engine, fuel injected, 115 hp, 120 torque.
2.2L 4 cyl 16 valve SOHC boxer engine, fuel injected, 137 hp, 145 torque

my98 2.2 L 4 cylinder aluminum alloy 16 valve SOHC boxer engine,
Sequential Multi-port fuel injection,
istributorless ignition
Horsepower: 137 5400 rpm
Torque: 145 @ 4000 rpm

my99 Phase II, 2.2 L 4 cylinder aluminum alloy 16 valve SOHC boxer engine,
Sequential Multi-port fuel injection,
distributorless ignition
Horsepower: 142 @ 5600 rpm
Torque: 149 @ 3600 rpm
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Old 01-18-2001, 12:21 AM   #9
slide
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My 95 has dual exhaust ports.
The change will be in the computer.
Pretty sure there isn't any mechanical changes.
Everything I've seen on the newer 2.2's should rob power.
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Old 01-18-2001, 12:28 AM   #10
Aspen
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I think the Phase II motors might have better/more efficient cylinder heads and/or a refined ecu. This is just speculation on the '99+ 2.2L models.

UPDATE: I just picked up some factory 2000 Subaru manuals and it appears that the 2000 2.2L motors have 10:1 compression ratios which are higher than the older engines. This could be one of the factors in the bump in HP on later model year cars.

I know for sure that headers doesn't have anything to do with it since the 2 port designs were found on '97-'99 2.2L models.

I'm still using the OBD1 ecu from my '94. No worry about check engine lights.


[This message has been edited by Aspen (edited January 17, 2001).]

[This message has been edited by Aspen (edited January 18, 2001).]
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Old 01-18-2001, 07:41 AM   #11
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Up through '95 (before OBD-II), the 2.2 engines had dual exhaust ports like the 1.8 and 2.5. '96 and later use a single exhaust port (one port per head). '99 phase II blocks have higher compression, lighter pistons, and a slider coating on the pistons along with changes to cams and heads. In '99 there was also a change for CA emissions to the MAP sensor (MAF for 49 state). The MAP setup then became standard in '2000 and later models.
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Old 01-18-2001, 01:10 PM   #12
Gambit
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99 EJ22 are 10.0:1 CR. I have the manual. It says so, I believe so, it is so.
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Old 01-18-2001, 02:48 PM   #13
svxtrem
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I am looking right now at the '99 Subaru Factory Service Manual #11 (Impreza). It states in section 2-3 [ENGINE] [SPECIFICATIONS AND SERVICE DATA] page 2:

Compression Ratio 9.7 for both 2.2 and 2.5

What manual are you looking at?

svxtrem
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Old 01-18-2001, 11:26 PM   #14
Aspen
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I've also seen the 9.7:1 compression ratio for the '99 Impreza Motors.

I just picked up the '00 factory manual last night and is indeed 10:1 compression ratio for the 2.2L

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Old 01-19-2001, 12:19 AM   #15
Aspen
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Good info SVXtrem.

Do you work for a dealership or know a Subaru Mechanic?

I thought OBD1 existed through 97 but I guess I was wrong.

Do you know if all the Legacy 2.2L motors had the dual port design too as oppose to the single port?

I'll have to double check but IIRC, I think the compression ratios have changed 3 times so far on the Impreza 2.2L motors. Am I correct?
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Old 01-19-2001, 12:32 AM   #16
svxtrem
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Aspen- I have the service manuals- that's how I know. I'm not sure about Legacy, don't have those manuals. Compression did change- Though '95 all 1.8, 2.2 were 9.5:1. In '96 Impreza 2.2 and 1.8 were 9.5:1, but Legacy 2.2 went to 9.7:1 and 2.5 was introduced with hyd lifters and 9.7:1. '97,98,99 Impreza has 9.7:1, After '99, I don't have manuals, but have heard Impreza w/Map is 10:1.

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