question for the 91-94 ej22 turbo legacys
Thread Starter
Registered User
iTrader: (1)
Joined: Apr 2006
Posts: 117
From: Roseville
Car Info: 98 subaru impreza
question for the 91-94 ej22 turbo legacys
what is the bolt pattern for the header exhaust manifold? for regular wrx's and sti's they have a 3 bolt pattern each side of the block. i have a impreza L with an ej22 but the header bolt pattern is different, there is only 2 bolts on each side. i was wondering if the ej22 turbo legacy had the same bolt pattern as my impreza so i can turbo it. i have a turbo up pipe, dp and exhaust, i'd just rather not have to make an exhaust manifold if i dont have to. thanks for your time
what is the bolt pattern for the header exhaust manifold? for regular wrx's and sti's they have a 3 bolt pattern each side of the block. i have a impreza L with an ej22 but the header bolt pattern is different, there is only 2 bolts on each side. i was wondering if the ej22 turbo legacy had the same bolt pattern as my impreza so i can turbo it. i have a turbo up pipe, dp and exhaust, i'd just rather not have to make an exhaust manifold if i dont have to. thanks for your time
I have a turbo legacy, but I'm not climbing underneath it right now and I can't remember
Registered User
iTrader: (12)
Joined: Nov 2002
Posts: 18,369
From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
The real question is whether the Legacy si single or dual port. Your L only has 2 bolts because it's single port. If the EJ22T is dual port, I'd bet it's the same bolt pattern as all the other dual port heads.
Thread Starter
Registered User
iTrader: (1)
Joined: Apr 2006
Posts: 117
From: Roseville
Car Info: 98 subaru impreza
lol ok i have a new question, is the ej22t legacy a single port or dual port? i knew what it was i just didnt know how to discribe it but i think that does it just fine.
Thread Starter
Registered User
iTrader: (1)
Joined: Apr 2006
Posts: 117
From: Roseville
Car Info: 98 subaru impreza
man F this car. ok so here's my next question since that wont work and i dont feel like making custom headers. will the stock heads off a SOHC 2.5rs bolt directly on to my ej22 block? for some reason i believe someone told me before that it would.
iClub Silver Vendor
iTrader: (25)
Joined: Nov 2002
Posts: 15,494
From: Participating in some Anarchy!
Car Info: 2005 LGT wagon
You can get all ej heads to bolt onto ej blocks.
The question is why would you?
If I'm reading you correctly, you want to turbocharge an NA motor.
This will end in failure, taking many dollars in the process.
The absolute, hands down, best way to turbocharge your car is to do a complete turbo powerplant swap: correct engine, harness, ecu, etc.
If you aren't willing to do it correctly, do not do it.
The question is why would you?
If I'm reading you correctly, you want to turbocharge an NA motor.
This will end in failure, taking many dollars in the process.
The absolute, hands down, best way to turbocharge your car is to do a complete turbo powerplant swap: correct engine, harness, ecu, etc.
If you aren't willing to do it correctly, do not do it.
You can get all ej heads to bolt onto ej blocks.
The question is why would you?
If I'm reading you correctly, you want to turbocharge an NA motor.
This will end in failure, taking many dollars in the process.
The absolute, hands down, best way to turbocharge your car is to do a complete turbo powerplant swap: correct engine, harness, ecu, etc.
If you aren't willing to do it correctly, do not do it.
The question is why would you?
If I'm reading you correctly, you want to turbocharge an NA motor.
This will end in failure, taking many dollars in the process.
The absolute, hands down, best way to turbocharge your car is to do a complete turbo powerplant swap: correct engine, harness, ecu, etc.
If you aren't willing to do it correctly, do not do it.
Registered User
iTrader: (5)
Joined: Feb 2005
Posts: 1,410
From: sacto
Car Info: '99 2.5rs - Rally Blue
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!
________
LOVE STORIES ADVICE
Last edited by svek; Feb 20, 2011 at 04:04 PM.
Thread Starter
Registered User
iTrader: (1)
Joined: Apr 2006
Posts: 117
From: Roseville
Car Info: 98 subaru impreza
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!
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.
Thread Starter
Registered User
iTrader: (1)
Joined: Apr 2006
Posts: 117
From: Roseville
Car Info: 98 subaru impreza