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Old 05-08-2001, 01:21 PM   #1
bryanw
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Post 22B Displacement

I noticed something strange when I was looking over the specs of the 22B engine. The accepted story is that they started with an STi 2.0 engine and bored it out to get 2.2 liters. Now I looked up the specs and it claims to be 2212 cc. Now that sounds fine, but that happens to match the displacement of the 2.2 sold in the U.S. exactly! I think that's a heck of a coincidence.

One of three scenarios must be true here:

1) The specs are different and the 22B's engine is not 2212 cc.

2) The published specs of the U.S. 2.2 is wrong and it isn't 2212 cc.

3) The blocks are identical.

Anybody?
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Old 05-08-2001, 01:25 PM   #2
Jewbaru
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they're probably both bored EJ20 blocks, just the 22b block is an STi version. *Shrug*.
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Old 05-08-2001, 01:46 PM   #3
bill harvey
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subaru only has 1 four cylinder block that is a ej20 the rest are that blcok bored and stroked even though they now cast the 2.5 and such as 2.5's but they all came from that design... just because something has the same displacement doesn't mean it is the same. the closest thing we have in the usa to the 22b block is the old legacy turbo block.
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Old 05-08-2001, 01:53 PM   #4
8Complex

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*nod* The 22B setup was basically a stroked 2.0L from what I understand.
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Old 05-08-2001, 02:17 PM   #5
bryanw
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Yea, I know all that, but my point is why does it match the displacement of the U.S. 22B EXACTLY when they were supposedly engineered completely separately. That's one hell of a coincidence.

Ok, I just looked up the bore and stroke of both engines. THEY'RE IDENTICAL. How can that be when we've been told repeatedly that STi started with the 2.0 and massaged it to 2.2 liters EXCLUSIVELY for the 22B? If so, how in the hell could it possibly have the exact same bore and stroke as the American 2.2 that was around for the previous 5 years?!!?
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Old 05-08-2001, 02:26 PM   #6
8Complex

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Maybe they tuned it exclusively for the 22B versus increased the displacement. *shrug*
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Old 05-08-2001, 02:39 PM   #7
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I think you've got your story wrong there pahdnah.

The EJ22 existed long before the 22B, before any Impreza. Just what do you think Subaru was rallying with in the early 90s?

Just because in 1998 they wanted to do the 22B and bring back the EJ22 turbo doesn't mean they would use anything but the old bore&stroke. Much better components than any previous production EJ22T ever got, no doubt-- truly unique engineering nah. It even has the same turbo as the STi4, undersized for the 22B by most estimations.
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Old 05-08-2001, 02:54 PM   #8
bryanw
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Quote:
From C&D:

"Mechanically, the 22B's major difference from the Type R STi is its bigger engine. An increase in cylinder bore punched out displacement to 2.2 liters, which Subaru says makes for better midrange torque"
I checked the specs and the 1.8, 2.0, and 2.2 all have the same stroke with different bores. The 1.8 and 2.0 have been around since the 80's so maybe it's just C&D's wording that I'm confused about. They make it sound like Subaru developed the 2.2 just for the 22B.
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Old 05-08-2001, 02:58 PM   #9
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The 22b block is bored to 2.2l, not stroked.
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Old 05-08-2001, 03:58 PM   #10
Jay_UK
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The 22B is not bored...

it is a 2.2 block... ala Legacy 2.2

It uses 96.9mm bore.. with a stock stroke

There is no way you can bore a 2.0 (92mm) bore out to 96.9mm

J.
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Old 05-08-2001, 11:39 PM   #11
sjt
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rsquire! where are you in our hour of need???
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Old 05-08-2001, 11:51 PM   #12
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On Gran Turismo (the athority of all things automobile ) it says that it has an ej22 block with ej20 heads among other things...
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Old 05-09-2001, 12:26 AM   #13
SuicidalLabRat
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Why is this a question? Even were it bored over, there would be no conspiracy; If I bore a 400 ci block over to 426 it doesn't make it a 426HEMI, I would not see the query in the identical cylinder size. Engines are cast differently, use different materials or grade compounds, are journaled different, bridged, open or closed; identical bore means nothing other than that, two engines with identical bore.

SLR-
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Old 05-09-2001, 12:37 AM   #14
WRXwannbe
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one word of advise, never belive an american car magazine. Though most of their info is correct, I recall that they too, suggested that the 22b makes actually 350hp according to a butt dyno. Just don't believe everything you read.

To take a closer examination of the 22b bottom end, You'll need to look at all the critical engine parts. Such as, oil pathways, crankshaft, tierods and bearings, pistons, Block tolerance, and Block molding tecniques. Obviously it's not just your run of the mill EJ22T block nor is it your everyday EJ20(a-gh) models. You can blow smoke of all kinds, but you'll have to ask the pro's on the UK board, might wanna ask prodrive and see if they had anything to do with the the design of the 22b

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