question for the 91-94 ej22 turbo legacys
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Car Info: 2005 LGT wagon
Yes, he can put a turbo on his stock motor and call it good.
However, the time, money, and effort spent on the conversion is better spent on doing it correctly, using the correct parts.
After all, the engineers at SOJ didn't just slap a turbo on an NA motor.
However, the time, money, and effort spent on the conversion is better spent on doing it correctly, using the correct parts.
After all, the engineers at SOJ didn't just slap a turbo on an NA motor.
Find out if your engine is Phase I or Phase II. Phase I blocks bolt up to Phase I heads and Phase II blocks bolt up to Phase II heads.
There are some Phase I Sohc heads, but most phase I 2.5 heads are DOHC and are found on the '98 impreza and various LGTs.
I am not sure if you can mix and match different phase blocks/heads.
Putting 2.5 heads on your 2.2 will lower the compression ratio and thus the engine will receive boost much more effectively than your stock 9.7:1 ratio. Depending on what head gasket you run, the CR should be around 8:1, which is *ideal* for a turbocharged car.
Don't listen to the swap fanboys, boosting the n/a engines can be done very cheaply and very reliably. As long as you don't cheap out on your engine management, you could boost that stock ejj22e for years without problems. People don't seem to understand thatit all comes down to the TUNE.. You can buy the best set of forged pistons and rods on the market, but without a proper tune you will blow the engine sky high.
Granted, the n/a pistons/rods are not meant for high boost applications (ie 20+ psi of boost), but if you want to slap on a td04 and set the wastegate spring to 10psi, the n/a pistons will hold just fine. Just remember, tune it right!
There are some Phase I Sohc heads, but most phase I 2.5 heads are DOHC and are found on the '98 impreza and various LGTs.
I am not sure if you can mix and match different phase blocks/heads.
Putting 2.5 heads on your 2.2 will lower the compression ratio and thus the engine will receive boost much more effectively than your stock 9.7:1 ratio. Depending on what head gasket you run, the CR should be around 8:1, which is *ideal* for a turbocharged car.
Don't listen to the swap fanboys, boosting the n/a engines can be done very cheaply and very reliably. As long as you don't cheap out on your engine management, you could boost that stock ejj22e for years without problems. People don't seem to understand thatit all comes down to the TUNE.. You can buy the best set of forged pistons and rods on the market, but without a proper tune you will blow the engine sky high.
Granted, the n/a pistons/rods are not meant for high boost applications (ie 20+ psi of boost), but if you want to slap on a td04 and set the wastegate spring to 10psi, the n/a pistons will hold just fine. Just remember, tune it right!
BanHammer™
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thanks a lot man, that helped a lot. thats kind of what i figured. about lowering the compression with a thicker head gasket. i had planned on doing that. i can understand the swapping motors cuz that motor stock is turbo'd so its already made for the turbo so i do truely believe that is the safest way to turbo a car but i dont plan on pushing more than 8 psi. im not building a race car i just need more that 137 hp lol. and all but i just turbo'd a stock civic without decompressing the engine and everything turned out fine. im just tryin to get all my info together right now before i make the final decision on what im really going to do when i do go to do it. any ideas are good for me right now. whether agreed or not with what i want to do. i wanna get into more internal work on engines thats kinda why i wanna keep my engine. i can do a straight swap, but i've never done internal work on a car before besides adjusting valves. by taking off the heads i'll have the chance to completely **** around with them and learn more about how they work. then later i'll buy another ej22 block and drop better internals in that engine and swap that block. its not like this is all gonna be within the next month or so. i prolly wont even get the heads til mid summer or what not. so like i said i just wanna get all my info done right now.
how do i figure out what "phase" engine i have. i dont wanna go dohc just cuz i wanna keep it as close to stock as possible thats why i wanna go with the 2.5RS heads cuz they are SOHC as well. just let me know, thanks for the info.
how do i figure out what "phase" engine i have. i dont wanna go dohc just cuz i wanna keep it as close to stock as possible thats why i wanna go with the 2.5RS heads cuz they are SOHC as well. just let me know, thanks for the info.
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From: sacto
Car Info: '99 2.5rs - Rally Blue
What are the correct parts? A complete swap? What if one has a 2.5 n/a and puts STi rods/pistons in and then reassembles the engine. Is that still an inferior engine and a complete waste of time, money and effort?
To the OP: how do you plan on smogging such a build...? I know how I (don't) do mine.
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Last edited by svek; Feb 20, 2011 at 04:05 PM.
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From: Roseville
Car Info: 98 subaru impreza
come on now there's no need to start fighting on here. im asking questions, i dont mean for people to get mad at each other over the whole situation though. i believe that paul is right, the safest way to do it is to swap the whole engine and all that good stuff. but i also believe that svek is right too. by swapping the heads with a thicker head gasket will lower my compression i will be safe enough to turbo it no problem. i agree with both of you guys. no need to fight. like i said before im not building a race car. the stock wrx is pushing what 225hp at 15 psi on a 8:1 ratio. there has to be a happy medium to make my 137 9:5:1 meet that 225 hp at say what 7-8 psi? the stock wrx stock runs a 13.8 1/4 mile weighing in at 3300 lbs. my car weighs 2600 lbs. if i got my car up to the 225hp weighing 700 lbs lighter than the wrx i wont complain at all. im just asking for opinions right now. i respect both your opinions. im just getting stuff together right now. any info right now would be good for me. last night found a website where the guy was doing the exact same thing i wanna do for my car but for his airplane. he had step by step instructions on how he did it. and it all makes sense to me. and from what i've been told, the ej22 is the stongest engine subaru has ever made, i dont know if its only the 22b thats the stongest or just the ej22 block itself but like i said any info is good for me
come on now there's no need to start fighting on here. im asking questions, i dont mean for people to get mad at each other over the whole situation though. i believe that paul is right, the safest way to do it is to swap the whole engine and all that good stuff. but i also believe that svek is right too. by swapping the heads with a thicker head gasket will lower my compression i will be safe enough to turbo it no problem. i agree with both of you guys. no need to fight. like i said before im not building a race car. the stock wrx is pushing what 225hp at 15 psi on a 8:1 ratio. there has to be a happy medium to make my 137 9:5:1 meet that 225 hp at say what 7-8 psi? the stock wrx stock runs a 13.8 1/4 mile weighing in at 3300 lbs. my car weighs 2600 lbs. if i got my car up to the 225hp weighing 700 lbs lighter than the wrx i wont complain at all. im just asking for opinions right now. i respect both your opinions. im just getting stuff together right now. any info right now would be good for me. last night found a website where the guy was doing the exact same thing i wanna do for my car but for his airplane. he had step by step instructions on how he did it. and it all makes sense to me. and from what i've been told, the ej22 is the stongest engine subaru has ever made, i dont know if its only the 22b thats the stongest or just the ej22 block itself but like i said any info is good for me
Thread Starter
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From: Roseville
Car Info: 98 subaru impreza
New question. i was looking at HG thicknesses and what to get. my block stock is 58mm. so i was looking around on the internet and i found a 92mm and a 98mm HG for my car. so now which thickness should i get?
Warm Fuzzy Admin
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Car Info: 97 LOB, 05 FXT, 03 Tundra
Jesus christ, 4cm?
Think about that for a second.
A: look at your block, do you think that HG is 6 centimeters thick?
2: Do you think adding 4 cm is realistic?
Common sense.
Think about that for a second.
A: look at your block, do you think that HG is 6 centimeters thick?
2: Do you think adding 4 cm is realistic?
Common sense.
Warm Fuzzy Admin
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From: Sacramento, CA
Car Info: 97 LOB, 05 FXT, 03 Tundra
Yeah, that was my thought. I'm almost thinking .58mm vs .98mm
Still, not to be a dick, I wouldn't be attempting a garage build based on internet advice without a lot more knowledge about motor builds. Building a hybrid is cheap because you do it yourself, and usually involves some learning/money along the way as opposed to a solution like a swap.
Still, not to be a dick, I wouldn't be attempting a garage build based on internet advice without a lot more knowledge about motor builds. Building a hybrid is cheap because you do it yourself, and usually involves some learning/money along the way as opposed to a solution like a swap.
Thread Starter
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Posts: 117
From: Roseville
Car Info: 98 subaru impreza
Thread Starter
Registered User
iTrader: (1)
Joined: Apr 2006
Posts: 117
From: Roseville
Car Info: 98 subaru impreza
Yeah, that was my thought. I'm almost thinking .58mm vs .98mm
Still, not to be a dick, I wouldn't be attempting a garage build based on internet advice without a lot more knowledge about motor builds. Building a hybrid is cheap because you do it yourself, and usually involves some learning/money along the way as opposed to a solution like a swap.
Still, not to be a dick, I wouldn't be attempting a garage build based on internet advice without a lot more knowledge about motor builds. Building a hybrid is cheap because you do it yourself, and usually involves some learning/money along the way as opposed to a solution like a swap.
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