i have a 1993 legacy ls 4wd as a project car, i have raised suspension and outback tires alike. But now i need more power, would a ej25 fit my 93 legacy? what kind of mods would i have to do with ecu and ignition? Please let me know
thanks
Neo
1996 Outback Sport 4WD
1991 Legacy FWD
1993 Legacy LS 4WD
I would imagine you would need the 2.5 wiring harness and computer to swap in to. Why not go with the 2.2turbo swap? It seems to be the more popular and easier swap around here. There is a Loyal running around here that a Subaru master tech put a 2.5L block with 2.2L heads on. I guess it gives it like a 12:1 compression ratio or something crazy like that, I guess it's pretty fast as long as you run 94octane in it.
Just wondering what you did to lift your Legacy? Did you just install Outback struts or do you have a body lift in it?
There is a Loyal running around here that a Subaru master tech put a 2.5L block with 2.2L heads on. I guess it gives it like a 12:1 compression ratio or something crazy like that, I guess it's pretty fast as long as you run 94octane in it.
who did this? i would like to have a conversation with that person!
greg donovan
greg donovan wrote:There is a Loyal running around here that a Subaru master tech put a 2.5L block with 2.2L heads on. I guess it gives it like a 12:1 compression ratio or something crazy like that, I guess it's pretty fast as long as you run 94octane in it.
who did this? i would like to have a conversation with that person!
greg donovan
His name is Jerry Costa, he works at at Tri-State Subaru in Webster Mass. I'm going to an SVX meet there this Sat. and he ussually comes out for tech talks and stuff. His Loyal is actually in the junk yard now, he gave it to them becouse the body is to rotted out to drive on the roads and the junk yard uses it at a parts getter around the yard and occasionally take it on the road to roast the front tires of of it. He also has some other crazy creations like a home made turbo 93 imprezza that eat's WRX's for lunch, or something like that.
would it be possible for you to ask him some questions about the combination of ej25 shortblock w/ej22 heads for me? does he lurk/post here ever?
my email is
g donov @ hotmail .com
w/out the spaces of course. i really want to try this combination. we are specifically concerned about timing, compression ratio, and the severity and/or existance of knock. as well as flow in valves since they are so much smaller than ej25 valves and power output.
I was talking to him alot about it last time and he was rattling on about the DOHC vs. the SOHC and a bunch of other stuff, but he did use the 2.5L computer and wireing harness and just said that he has to run high octaine gas in it. Other than that I don't think he had any problems with it.
Are you thinking about putting a 2.5L block in a 2.2 Legacy or 2.2L heads in a 2.5L Legacy.? I think the idea works best if your just putting 2.2L heads in a 2.5L Legacy. I'll get you some more info this weekend if you want.
the plan is a 2.5 block into a 2.2 car w/2.2 heads. i would love some more info. especially why he needed to use a 2.5 ecu. i believe the block to be used will be a phase II sohc block. one engine will use 95 2.2 heads the other will use 90 2.2 heads. the 95 will be in a 95 auto awd lsi sedan and the 90 will be in a 90 fwd 5sp l sedan.
he probably used a 2.5 ecu because that's the car he stoll the motor from, or had the motor in.
You're doing it backwards.....and I don't see a problem running the 2.2 ECU. You will just need to make damn sure you run high octane fuel.
I would also suggest you do some measuring to figure out what your actual compression ratio will be when you're all said and done. If you're not sure how to do it, or don't feel comfortable, I'd pay a shop to.
There's probably some places on the web or books on how to figure all the stuff out. I really haven't looked at that type of stuff for a while.....so it's fuzzy.
already run BP 91 which is the highest here. we are lucky its only 1.50 here. if thats not high enough we would use booster untill we get a water injection set up. especially if the rumored 12:1 is true. if that is this engine they could be high strung little rockets that need 100. in that case i may pass untill i get a different daily driver or build a good water injection system. however 12:1 seems really high. cuz the vw guys take 2 liter blocks w/1.8 heads and they are around 10.5 to 1 from what i have been told.
Brat4by4 wrote:Remind me what a RJ22 is again. Is that a Mazda engine or something?
You couldn't let it slide could you?
Anyway you should be good to go. He did just use a 2.5 block with 91 2.2 heads, intake, wireing harness and computer. So all you have to do stick a 2.5L block between your heads and go, but he ran 94octane gas in it to keep it happy. If all you have there is 91 you might have to run some octane booster and the only other thing you have to do is open up the coolant passages in the head. He said to use the 2.5L heads gaskets and lay them on the head and then mark in the areas that have to be ground out. He said you could just use a die grinder to remove the excess material but just make sure to get the heads planned and cleaned afterward.
we do have 92 i guess. sounds cool. that is exactly what we were going to do w/the gaskets. the guy im doing this with is also a senior master tech at a subaru lot.
is there anyway i could contact jerry myself if i have other questions? im sure we will have more.
thanks alot for helping get this info. not alot of people are focused on all motor subarus so its a rare treat to find somone who is. thanks again
greg
