drink

Okay, I got the response back, and it didn't tell me diddly that I didn't already know. They may be quick about responding, but the response is not necessarily helpful:

I used http://www.subaru.com/tools/contactus/index.jsp to drop them a line, we'll see what happens. Here's the text:

Which heads? Do you mean EJ22, or...? I imagine that would provide some improvement all by itself due to flow.

I'm not sure either. It's hard to tell with the slush box. I'm sure I'd need a tuner ECU to raise the redline, because AFAIK the ECU talks to the auto trans too, right? And that's electronically controlled. And, on top of that, the slush box may or may not be able to handle more than 6000 rpm. I do know that the owner's manual says not to operate the engine above redline for more than a few moments, so I suspect the OBD-I cars (at least '93/'94, maybe more) do NOT have a fuel cut, or it's at higher than 6k RPM. Certainly on the auto trans model it does not fuel cut at, say, 6100 rpm; the trans shifts shortly after that even if you have the hammer all the way down. I haven't tried it in second gear "manual" mode to see if it will go over redline, but I will soon (for a brief moment, natch.) Mostly the redline thing is just curiosity. It probably wouldn't do any good without some a new cam anyway, in my case. If I had the 5 speed I might care. Sometime down the road I do want to buy something pissed off and AWD, but that will depend largely on which is cheaper (used) when I actually have money, WRX STi or Lancer Evo. Certainly, even my '93 Impreza LS is a sweet, sweet ride with the exception of the abject gutlessness. I live on a mountain (as per my profile) with twisty roads and potholes, and the impreza is a CHAMP everywhere but uphill. I can only imagine what it's like to drive a pumped turbo suby. Any advice on where to pick up a factory service manual set, or should I just watch fleabay?

Nope, I'm not scared off, I just have only dialup internet at home. Anyway, I could swear that EJ18S appeared in my owner's manual, but it's in the car right now and I'm not, so I can't check. I assumed the S stood for SOHC. Then again, I could have just hallucinated seeing it in there. If it weren't so hot out there, and so nice and cool in here, I'd go check To soothe some of the concerns of others, it's pretty likely that I would rebuild the motor were I to put a turbo on it; I'd likely want to balance it and see if I can get the RPMs up - or is the 6,000 rpm redline on my '93 just a "to be safe" kind of thing? Not that I'd want to raise it on a high-mileage vehicle like mine. It's been babied (little old lady, all freeway miles, single owner) but that's a lot of miles no matter how you count. I'm looking for about 180hp (I'm realistic) so I'm thinking I wouldn't need to run more than about 12 psi? I would think that wouldn't be so unreachable, even with the factory compression. Are there lower-compression pistons for EJ18?

Hi, I recently purchased a 1993 Impreza LS with 225k miles. It had the timing belt changed about on schedule (at 110k mi, suggested is 105k for inspection) and it's probably about time for another one. Since it's a '93 LS it has an auto trans and AWD. Now, I know I can swap an EJ22S or the 2.5 liter for that matter in there; certainly it seems like the 2.2 liter is not really worth it given how much more power comes out of the 2.5. Still, I haven't given up on the 1.8 liter yet. My prior ricemobile was a 1989 240SX, 2.4 liter 155bhp/155lb-ft, so the 2.5 will probably about do it. The weight of both vehicles is virtually identical. But, I'd like to explore other options. More immediately, what's the cheapest intake worth buying? Long before I have money for a turbo kit or an engine swap, I'll have a few bucks to blow on an intake - is it even worth it? I don't know how restrictive the EJ18S' intake is. The real question, though, is whether I should do an RS swap, or install a turbo kit. The 1.8 liter turbo available for my Nissan kicks out 180hp, can I get that much power out of the EJ18S? Redline seems to only be 6000 on my Impreza, I've heard that others have over 7000, but I don't know if my auto trans can even handle RPMs that high. I've heard it does fine with the improved power, though. How much power can I get out of a turbo kit for the EJ18S? Is it possible and/or desirable to raise the rev limiter? Etc. Feel free to point me to other resources, I did do a search on this forum before posting but I might have just missed something.