thermalsurfing1 Posted October 21, 2009 Share Posted October 21, 2009 (edited) i am getting ready to do the 2.2 swap in my 83 brat when my friend saw that the manifold looks different then his. the engine was just bought off craigslist and is a out of a 1999 Subaru Impreza and is a phase 2 2.2 with what we discovered has 2.5 heads and manifold . my question is has anyone heard of this being done ? if so did it work or add any horsepower ? thanks .. thermal Edited October 21, 2009 by thermalsurfing1 Quote Link to comment Share on other sites More sharing options...
Turbone Posted October 21, 2009 Share Posted October 21, 2009 May not be exactly what you are looking for, but its the closest I could find. http://forums.nasioc.com/forums/showthread.php?t=1850404&highlight=2.2+with+2.5+heads Btw, I plan on doing this build and swap this winter. Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 21, 2009 Author Share Posted October 21, 2009 (edited) thanks for the link. i have done a lot of searching on the board and cant find any info on 2.5 heads on a 2.2 engine. i just want to know if i got burned or if this has been before. Edited October 21, 2009 by thermalsurfing1 Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 21, 2009 Author Share Posted October 21, 2009 Turbone that will be cool as i plan on doing the swap around the same time. i ordered the adapter kit from sjr and have the engine and 4 speed tranny and rear diff so far. i sent the harness to numbchuck so i hope by this winter i have everyting i need for the swap. Quote Link to comment Share on other sites More sharing options...
Numbchux Posted October 21, 2009 Share Posted October 21, 2009 well, the heads/intake have to match each other, as well as the wiring/ECU. so if you sent me 2.2 wiring, it won't work with that combo. 2.2 block with 2.5 heads would drop your compression. probably to something around 8.7-9.0:1. which means a drop in power, but perfect for a turbo. now. doing the exact opposite (2.5 bottom end with 2.2 heads) bumps your compression up. means you have to run higher octane fuel to prevent DET, but the torque curve is pretty sweet. Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 21, 2009 Author Share Posted October 21, 2009 Numbchux thanks for the reply. i should have researched the purchase a bit more before dropping 700 on the engine........ i have no idea what harness i have that came with the engine but is their a way to make it work ? do i need to sell the engine and buy another one ? darn it i did it again and i thought i scored but it looks like i messed up big time. dam dam dam Quote Link to comment Share on other sites More sharing options...
Zefy Posted October 21, 2009 Share Posted October 21, 2009 are you sure you have 2.5 heads and manifold? The phase 2 ej22 heads and manifold are virtually identical to the ej25 SOHC engines with one big difference. The 2.2 has single port exhaust. i have a 2003 ej25 from a 2.5rs in my 99 impreza (original ej22 car). The intake manifolds are interchangeable and the heads have the same casting. check the exhaust ports. now that is an obd2 engine so swapping it is slightly more difficult. Also, if it is a 99 impreza it should have a MAF sensor. If you truly do have ej25 goods it should have a MAP sensor on it. ej22 does not. Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 21, 2009 Author Share Posted October 21, 2009 well the exhaust ports have 2 holes in them so i think its a duel port.? Quote Link to comment Share on other sites More sharing options...
Zefy Posted October 21, 2009 Share Posted October 21, 2009 Weird.. Such an odd swap. Makes me wonder what else is going on with that engine. Is the motor running off a map or a maf? A 99 impreza L should not be able to run with a map. Something here doesn't add up... Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 21, 2009 Author Share Posted October 21, 2009 Is the motor running off a map or a maf? i dont know what those are ! Quote Link to comment Share on other sites More sharing options...
mellow65 Posted October 22, 2009 Share Posted October 22, 2009 i can not confirm nor deniy that i might have put phase 2 ej25 heads on a ej22 block in a 2.5rs when i when i found out that about half the head bolts holes were jacked up. and i needed to sell the thing. i drug it out to an auction to get rid of it. but yes it can be done and really other then the power it was a sweet running motor. i used ej22 head gaskets and the combustion chamber on the head was smaller then the hole in the gasket so i went with it. so yes it's been done, no there is no power benefit to it, it was just way cheaper for me to do it this way. although guys have been swapping DOHC heads onto ej22ts for years. Quote Link to comment Share on other sites More sharing options...
ShawnW Posted October 22, 2009 Share Posted October 22, 2009 Sounds like a really late Ej22 to me. Its just got a head that looks like a 2.5SOHC head and a 2.2 block. This one is interference and usually comes in a 99-02 base impreza or legacy. Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 22, 2009 Author Share Posted October 22, 2009 (edited) so matt aka mellow65 you are the one i bought this engine from, whats the deal with it. Edited October 22, 2009 by thermalsurfing1 Quote Link to comment Share on other sites More sharing options...
mellow65 Posted October 22, 2009 Share Posted October 22, 2009 so matt aka mellow65 you are the one i bought this engine from, whats the deal with it. i know nothing. Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 22, 2009 Author Share Posted October 22, 2009 so what you are saying is you burned me for 700.00 ? Quote Link to comment Share on other sites More sharing options...
mellow65 Posted October 22, 2009 Share Posted October 22, 2009 so what you are saying is you burned me for 700.00 ? WTF? i didn't sell you any motor. my ordeal i talked about was in a car that i was selling. i sold it years ago. i was just saying it has been done. what the hell you talking about I burned you for $700? Quote Link to comment Share on other sites More sharing options...
thermalsurfing1 Posted October 22, 2009 Author Share Posted October 22, 2009 (edited) i thought you where the same matt in portland that sold this to me.....just seemed odd that you have the same name and live in the same city and spoke of the same engine and with reply's like i know nothing and i can not confirm nor deniy that i might have put phase 2 ej25 heads on a ej22 block in a 2.5rs ..............my bad Edited October 22, 2009 by thermalsurfing1 Quote Link to comment Share on other sites More sharing options...
mellow65 Posted October 22, 2009 Share Posted October 22, 2009 yeah ok i can see where that would sound a little jinkey. but if you want to get rid of those 2.5 heads and intake i have been looking for a set. and i even have a good set of 2.2 heads we can work something out with a trade. Quote Link to comment Share on other sites More sharing options...
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