Hey Everybody,

 

I've got a 93 Impreza L AWD Auto with the 1.8L motor. The car is in excellent condition. Interior, exterior, driveline everything. Unfortunately its pushing 270,000 km. My mechanic has a high mileage 92(?) legacy wagon he said i could have for 50 bucks. So I was thinking that if i were faced with a rebuild in the next year would it make sense to rebuild the 2.2 out of the legacy and use it in the impreza? How serious a conversion is this? I've done motor-swaps on GM cars (307-305) conversions so I can handle relatively strait forward stuff.

Would this be a possible/ worthwhile project or would i be better off doing the 1.8? Any feed back would be great

Dave

I think it's a direct swap, but you may have to use the 1.8 intake due to some differences in the sensors. Do some searching on here as I believe some of this was discussed recently.

 

Keith

I think it's a direct swap, but you may have to use the 1.8 intake due to some differences in the sensors. Do some searching on here as I believe some of this was discussed recently.

 

Keith

Nope, it's not, for some reason Subaru made a lot of differences between the EJ18 powered Imprezas and the EJ22 powered ones. The wiring harness is totally different, although most of the functions are the same, the way the harness connects from the front harness to the body harness is different. Also the pin out of the EJ22 ECU is different then that of the EJ18. With all that said, it might be possible to just to use the Legacy front and engine wiring harness and splice the dash harness into that one. Like I said, alot of the sensors are the same, but the way they connect to the harness is different. Personally if I were going to go throught the hassle, I'd install a JDM EJ20G out of an early WRX, that would actually be easier, but not as cheap.

I would think it woudl be pretty easy if you used the 2.2 ecu intake and exhaust thats what im plannin on doin with my preza which is a 93

 

 

 

is the AWD system controled by the ECU though?

not sure...Someone recently posted that they had converted a 98 legacy 2.5 to a 2.2 turbo out of a 1993 legacy. He said that he had used the existing ECU. Not sure if that applies to the AWD system

Anybody else

Corky,

 

I don't know why you had problems doing your 1.8 to 2.2 conversion. We've seen a lot, and Rick says it's the easiest conversion there is. Same wiring harness, same ECU, same intake manifold. The EJ18 doesn't have a knock sensor like the EJ22, but the EJ18 ECU doesn't recognize a sensor anyway.

 

Now, if you try to put a '96 or later EJ22 into a '93 EJ18, I can see the possibility of some issues, but a '90-94 EJ22 should be a direct bolt in.

 

BTW, the transmission is controlled by a completely different unit. Basically, the only 2 things they share is the TPS and temp sensor.

 

Emily

http://www.ccrengines.com

Corky,

 

I don't know why you had problems doing your 1.8 to 2.2 conversion. We've seen a lot, and Rick says it's the easiest conversion there is. Same wiring harness, same ECU, same intake manifold. The EJ18 doesn't have a knock sensor like the EJ22, but the EJ18 ECU doesn't recognize a sensor anyway.

 

Now, if you try to put a '96 or later EJ22 into a '93 EJ18, I can see the possibility of some issues, but a '90-94 EJ22 should be a direct bolt in.

 

BTW, the transmission is controlled by a completely different unit. Basically, the only 2 things they share is the TPS and temp sensor.

 

Emily

http://www.ccrengines.com

Emily, the engine harness may be the same, but the ECU is not the same (different part numbers), the body harness is different. How do I know this, I just converted my 96 EJ18 powered Impreza to a JDM WRX EJ20G, in doing so I reseached everything and noticed the difference in the harnesses. My research showed that the JDM Impreza and the USDM EJ22 powered Impreza had harnesses that were similar, but my EJ18 powered Impreza had different type connectors between the different harnesses. I have the FSMs for the Imprezas (93 through 97) and they show two different wiring scematics, one for the EJ18 , and one for the EJ22. I'm not saying it can't be done, but I'm saying that it is not a simple bolt up conversion. I'm sure the you could even get an EJ22 to run with an EJ18 ECU, but it would be at 100%. If I hadn't have done all my research I wouldn't have said anything.