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Old 05-07-2009, 03:58 PM   #1
jonnymick
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Default m90 on an ej22-what will i need?

i have a machinist buddy that has all the tools & materials & says he will help me fab up the intake manifold, ive got the m90, & ive got a 93 legacy ej22 5 speed awd coupe. rather than going turbo like everyone else, & considering ive always wanted a supercharged 4 cylinder (dont ask me why, i just always have)-ive decided that id like to cram the m90 on top of the ej22 & build it for 350 whp. can anyone on here give me an idea of what ill need to do the ej22 interally to make it stand up to the boost? i am -probably- going to go the route of megasquirt unless i can find something cheaper-& i intend to have someone do an SC port on the heads but as of yet i dont know who, as well as a grind for the cams i am at a loss but i will be looking around on the site all night so ill see if i can find anything. any help would be greatly appreciated!

yes i realize i will have to relocate the alternator & yes i will have to cut a hole in my hood & install a cowl or etc...
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Old 05-07-2009, 04:28 PM   #2
JDMFLCL
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your lucky ive been researching this

pretty much you want all the internals you can find...the cylinder walls are fine and some DOHC heads
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Old 05-08-2009, 12:25 AM   #3
Spudchucker
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2006 Impreza 2.5ISC
M90 SUPERCHARGED

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Yeah, get ready to permanently disfigure the entire front end of your car lol. Definitely draws some eyes going down the street though


The 2.2 is notorious for being unkillable.. It is a very rugged engine, and will hold boost well. While you should definitely lower the compression and get forged rods/pistons if you're using an M90 to it's full strength, the block and heads are more than strong enough to handle a decent amount of boost, and even the stock internals will be fine with 5 psi give or take, which you can achieve via an underdrive crank pulley (you can get mine if you want) There's also injectors, fuel pump, plugs, etc.

I'm pretty sure engine management for your year is more physical than electronic, but I'm not sure how it works for the old models.. reddevil can probably help you there


Oh yeah, 350 WHP will also melt your clutch, and approach the point of needing a new transmission.
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Old 05-08-2009, 09:30 AM   #4
jonnymick
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lol that sucks to head about the trans, & honestly if im getting my camshafts custom ground for the application then why do i need to get the doc heads? and as for the transmission, what would you guys recommend me putting in to replace the stock one? i could care less 5 speed or auto really, but i highly doubt any awd auto trans is going to like 350 whp for very long. also can anyone help me find out how much cfm the m90 flows with the different sized pulleys?
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Old 05-08-2009, 10:39 AM   #5
Spudchucker
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Quote:
Originally Posted by jonnymick View Post
lol that sucks to head about the trans, & honestly if im getting my camshafts custom ground for the application then why do i need to get the doc heads? and as for the transmission, what would you guys recommend me putting in to replace the stock one? i could care less 5 speed or auto really, but i highly doubt any awd auto trans is going to like 350 whp for very long. also can anyone help me find out how much cfm the m90 flows with the different sized pulleys?
You don't need DOHC, if anything that will only hurt your potential mid-band torque. People get so worked up over DOHC sometimes that they forget the fact the SOHC flows better, and is better for torque as a rule of thumb.

The M90 flows 1.5 liters per revolution at 100% VE. In my car (2.5 liters) it produced 4psi, sometimes approached 5 psi with my underdriven crank pulley on, which ran it at a 1:1 drive ratio (the supercharger was spinning at whatever speed the engine was spinning) Now that I've put my stock pulley back on and brought the ratio to something like 1.5-1.7:1, I'm getting at least 8 psi, though I'm too scared to floor it and find out exactly where it caps off (my AFR hits like 17+:1 with the current injectors and a heavy foot, not good haha). I have some STi injectors waiting for me in Massachusetts, so I will know this weekend just what my car can do for boost. Of course I'll be putting an intercooler in with the injectors, so boost levels could drop a pound or two, but it will be a good general idea anyways

As for the transmission, sorry but I'm not really qualified yet in that field. Is your car auto or manual? Manual will take a lot more of a beating to start with. You should be able to do 10 pounds on it no problem if it's good and healthy, and you don't launch everywhere. 350 WHP is a lottt of power haha, running the M90 with your stock pulley won't get you near that, but it will still drop you well ahead of a WRX, and somewhere into the neighborhood of the STi
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Old 05-08-2009, 12:47 PM   #6
Zefy
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while the newer SOHC heads flow better than the DOHC it is a completely different story with your stock ej22 heads. They DON'T flow as well as any of the 2.5L heads.

also if you throw 2.5L heads (dual or single) on your 2.2L block you will get lower compression right off the bat. 2 problems solved! better flow and lower compression.

jump around the forums and look at EVERYTHING. there is a bevy of info surrounding hybrid motors.

and you might want to look at your car again. legacy coupe doesn't exist...
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Old 08-31-2009, 10:36 PM   #7
TRBO_BXR
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Quote:
Originally Posted by Spudchucker View Post
You don't need DOHC, if anything that will only hurt your potential mid-band torque. People get so worked up over DOHC sometimes that they forget the fact the SOHC flows better, and is better for torque as a rule of thumb.

The M90 flows 1.5 liters per revolution at 100% VE. In my car (2.5 liters) it produced 4psi, sometimes approached 5 psi with my underdriven crank pulley on, which ran it at a 1:1 drive ratio (the supercharger was spinning at whatever speed the engine was spinning) Now that I've put my stock pulley back on and brought the ratio to something like 1.5-1.7:1, I'm getting at least 8 psi, though I'm too scared to floor it and find out exactly where it caps off (my AFR hits like 17+:1 with the current injectors and a heavy foot, not good haha). I have some STi injectors waiting for me in Massachusetts, so I will know this weekend just what my car can do for boost. Of course I'll be putting an intercooler in with the injectors, so boost levels could drop a pound or two, but it will be a good general idea anyways

As for the transmission, sorry but I'm not really qualified yet in that field. Is your car auto or manual? Manual will take a lot more of a beating to start with. You should be able to do 10 pounds on it no problem if it's good and healthy, and you don't launch everywhere. 350 WHP is a lottt of power haha, running the M90 with your stock pulley won't get you near that, but it will still drop you well ahead of a WRX, and somewhere into the neighborhood of the STi

So i've seen your video's but did you ever complete everything? i would like to see.
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Old 09-01-2009, 03:06 AM   #8
iluvdrt
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Quote:
Originally Posted by Spudchucker View Post
You don't need DOHC, if anything that will only hurt your potential mid-band torque. People get so worked up over DOHC sometimes that they forget the fact the SOHC flows better, and is better for torque as a rule of thumb.

The stock 2.2 turbo heads are junk. The DOHC heads flow way better than the 2.2 SOHC heads, and the WRX. IIRC the only USDM heads that flow better than the 2.5 DOHC heads are the 2.5 SOHC and the STi heads.

There are pics of the ports on Legacy Central that support this. The DOHC head ports are 2x bigger than the 2.2 turbo SOHC heads, and about 25 percent larger than a WRX.

Keep in mind if he uses the DOHC heads he will have to get the intake for it as well since the 2.2 intake will not bolt up. This also gives him a better option for injectors. The 2.2 turbo manifold has little options for injectors.
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Old 09-02-2009, 12:23 PM   #9
anothernord
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Default

You may or may not have read this thread, but I believe it is a must read for anyone considering supercharger their scoob.

http://forums.nasioc.com/forums/showthread.php?t=605625

I would look into using an intercooler; preferably a front mount if you are going to push a lot of boost. Lowered IAT will go a long way to preventing blown engines.
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