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Old 12-09-1999, 09:43 PM   #1
Sube Doo
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Join Date: Sep 1999
Location: Redmond, Washington, USA
Post Getting 300hp

I'm thinking of purchasing a new 2.2 L legacy turbo short block. I haven't yet figured out the path i should take for getting more horsepower out of it under boost. I was wondering if pipping for a japanese spec legacy or impreza would work. In general I'm throwing this idea around and need some input and advice. I would appreciate anything you could tell me.


Thanks
Matt
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Old 12-10-1999, 06:15 AM   #2
Miller3339
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Location: Everett, Wa. Snohomish CO.
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Matt is your car a Turbo now??
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Old 12-10-1999, 10:06 PM   #3
Submerk
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It's not hard to get 300hp on this motor but you have to spend a lot of money, though. All the piping would work but you need a little modification because some model they locate turbo a little bit upfront, some it close to the legacy turbo is. In Japan and in Asia, they can pump up is short block to 400 or 500hp. So why not 300hp.
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Old 12-11-1999, 08:53 AM   #4
PeteH
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Why purchase a new 2.2 Turbo Block? The pistons while being moly coated are cast, not forged, this is the first weak point. Next would be the rods, aftermarket pieces are available as well.

What would I do? Or should I say, what am I planning on doing? Salvage yard 2.2 turbo motor, short block would be o.k. It is a known fact that a good "seasoned" block is better than a brand new block. Why? through the continous heat cycling during normal useage the block becomes effectivily "stress relieved" at the molecular level, making it a more stable starting point. Next replace the pistons/rods with aftermarket forged units and attach them to the factory crankshaft which is said to be bulletproof. The cylinder heads are the appearant restriction, several upgrades are possable including: 2.5L DOHC, and I am not certain but I believe some of the STi heads have a thicker deck and more material surrounding the ports allowing them to be ported without fear of breaking through as with the stock 2.2L turbo heads. As I recall the STi casting comes from a differant mold all together, but I am having trouble verifing this. The STi heads also come with solid lifters and differant cams more conductive to our high HP goals. The exhaust manifold on the 2.0L has been found to have larger "tubes" allowing better flow, but I think I will just send my stock 2.2L Turbo manifold out for ExtrudHoning. Turbo sizing would be the next issue to tackle...........

PeteH
'92 Turbo Legacy
17"SpeedLines/Pzero's
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Old 12-11-1999, 03:41 PM   #5
Shik
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Chapter/Region: Tri-State
Location: Central PA
Vehicle:
2006 GT Ltd 5spd sdn
2015 WRX 6spd CWP

Post

Pete, any idea if the design of the stock heads really are bad for making decent power(less then 300hp) or are they just not as good as the DOHC heads. Chances are I won't be in the position to get new heads, but maybe getting some mild work or ExtrudHoning done to them would would yield some improvements over their current state(?). Also, while I'm asking questions, any idea what size our injectors are? I know some of you guys were running 13psi + with the stockers but are they getting close to their limit in that area? Thanks.

Matt

Oh, BTW Pete, I will be stealing your wheels sometime in the near future. Just thought I'd let you know
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Old 12-11-1999, 04:30 PM   #6
PeteH
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The stock heads have two problems, hydraulic lifters: these will limit the rpm's the engine will be able to operate at = stuck with the 6500rpm limit. If you add the forged pistons/rods your maximum safe rpm limit will be in the 7500 range. Ports: the gentlemen who did the 2.2 turbo airplane engine build discovered insuffecient material around the ports = very limited portability. Because of these two reasons I determined it would be easier to swap in a set of STi heads with there non-hydraulic lifters.

PeteH
'92 Turbo Legacy
17"SpeedLines/Pzero's (safe in winter storage :-p)
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Old 12-11-1999, 11:44 PM   #7
Submerk
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I was told by Paul Eklund that our stock injector is 380cc per miniute and can go to 250hp if we adjust fuel pressure. Also he said that Pantera Speacialist by Lance Nist is developing a ~500cc injector with fuel rail for this engine. I think it's gonna look like Byrons's engine but the Byrons car use 660cc one. What you guy think about Byrons car, it has no MAF sensor.
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Old 12-12-1999, 06:52 AM   #8
PeteH
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Talking

Dispite all the misinformation about Byrons car I think he has accomplished a very professional "looking" installation, we will have to wait for some "real" hp numbers to determine if it runs as good as it looks! As for removing the MAF, look at it this way, you can buy 2 or 3 seperate controllers to do everything you want (fuel/ignition/wastegate/etc) and still be stuck with the restriction of the MAF, OR, buy an aftermarket engine management system, like Byron did, and remove all of the limitations associated with the stock ECU plus give you all the power you need to adjust ALL the parameters of your setup! Check these guys out http://www.sdsefi.com/index.html to learn some of the advantages. They have a fairly affordable system (almost cheap compared to some others) if people are confident enough to use these in airplanes I don't have a problem using it in my car! Of course you still have to tune it.......... They will send the unit to you with a base map for your engine combo so you will be able to start the car. So why mess around trying to "fool" the stock ECU?

PeteH
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Old 12-12-1999, 09:45 PM   #9
Submerk
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Is this system has the same sensor we have? The Byrons car use Wolf3D which this company specailize in Nissan car, and come with all the sensor that match our car. Maybe I'm wrong but I've been talk to some people about Accel and PMS system, these system don't have the sensor for Subaru car, so these might not work.
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Old 12-14-1999, 03:39 PM   #10
PeteH
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Thumbs up

I am not sure what you are asking, The SDS system WILL work on Subaru vehicles. The kit includes all of the sensors/senders required as well as new ignition coils. The only real "work" required is the installation of the crank position sensor, but anyone with a hand drill and a vice can accomplish this. There kit even includes a wiring harness! The Wolf system as well as all the rest will work as well, what is it that they say won't fit? The only thing I can think of is perhaps one of the senders they are using doesn't have the correct metric thread to screw into our blocks? In either case I do not believe this is a big problem.

PeteH
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