OhChit

Has anyone on this Board ever built a Subaru Stroker Engine? I’m considering building a 2.5 SOHC Stroker Engine but not sure what is sold to do so, or if parts are available etc? Also not sure my efforts will be worth the price? The engine will be going into a semi race car after market ECU etc and at this time I’m just kicking the idea around and would need to know what gains one could expect from such efforts? Thanks Jon

Anyone ever Port or Polish your own Sube heads? Or have any info where to go links etc to see some pics or hints of How-to Port & Polish Subaru Heads. I’m mostly concerned with the 2.5 SOHC Heads, but would think that most head porting & polishing would be the same or similar? Any help would be greatly appreciated.

Blitz... Thanks alot. You da-man. I'll dig through those links that you posted, and between what I have been told, and can dig up in those threads I'm sure I'll come up with a happy solution. By the way, I've decided to go with the 2.5 STI block and a set of 2.5 SOHC Heads and valves. A T3-4 turbo, ported heads, after market ECU and AIM dash cluster. I've been told that the stock 2.5 cams will perform very well with this combo. I'm also going to need some Hi RPM's maybe red line of 6500. It's mostly the zero to top end that I need, as this car's going to see much of it's life on the 1\4 mile strip and some short rally tracks. Jon

Yea. I hear that they are developing a new type of Hybred car. The batteries are said to be 40% lighter and last 50% longer between recharges as those used by others. They are also doing something with the a turbo / electric engine that really extends travel distances speeds, and fuel usage. Can't wait.

Blitz. Thanks for the info and valve research opening and closing. I had already contacted Cobb Tuning and they mentioned that they do have a cam for the 2.5 but the person that I spoke to didn't know much about it, nor did they say that it will work with a Turbo. I'm waiting to speak with one of their tech guys. Actually the 2.2T heads will be the best fit due to their smaller size, after looking at them I think that I can port the combustion camber a little larger. Do you happen to have any comparison on the 2.2T valve opening and closing as compaired to the 2.0 T ... I'm also wondering if the 2.2 heads will hold up on the 2.5 STI block and will be able to handle higher boost of maybe 15-20 lbs. Do you know who sells stronger valve springs? Thanks Jon

Where does it say that I intend on running a standard Head? I'm trying to suplement the Turbo block with a converted 2.5 SOHC head and Turbo cams. If need be I'll have the 2.5 SOHC heads ported for better air flow. or I'll use a pair of 2.2 Turbo heads. Not even close to a standard head.

Mate thanks for your help, but I just can't beleive that this hasn't been done before successfully. And even more so that someone on here dosn't know if it can be done? As I mentioned, I'm limited to space issues and simply trying to utlize a 2.5 STI low compression block and a SOHC set of heads. Now it's just a choice weather to use the 2.2 Turbo heads and cams, or try to use the SOHC 2.5 heads and come up with some sort of cam?

Did you check the phone book for your local Subie repair shop. By the way I'm sure there is plenty of capable mechanics in NJ as it is where Subaru Headquarters is located.

Help-ppp Anyone?

I have a Project that I'm working on. It's a non street car and due to engine bay clearence issues I am limited to engine width of no more then 29" wide. The Subaru 2.5 SOHC engine will just about clear but is a thight fit, my problem is that I plan on running a Turbo I have a STI 2.5 Block, the problem area is the Heads and Cams? Does anyone know who makes a Turbo cam for the 2.5 SOHC heads? or I can run the 2.2 Turbo heads and in doing so I can keep the total width of the engine around 27" wide. Does anyone have any experience with running the earlier 2.2 Turbo heads on a 2.5 Block? I know the heads will fit, my concerens are will I lose much power due to the older generation heads? Or will the heads be able to handle the increased power delivered by the 2.5 STI block? This engine will be running an after-market ECU so the computer and wiring harness shouldn't be an issue. Also who sells beefer valve springs etc for these applications? Sorry for all the questions, but you guys are the Subie-experts Jon

Thanks for the Link-e-dink I'm trying to post better pics via the Hosting site hopefully they show up? that's nice, is it fully polished? pictures are "sized" according to how much data they take up. if you save at a lesser quality, you can attach a larger pic, but they do have upper limits on size as well. try playing with http://www.imageshack.us .

Hey Guys check out my BugaRu.. What do you think? It will be undergoing another engine transplant soon with a 325+ HP Outback engine. Pic attached hopefully you can see the small pic. By the way why are picture sizes limited to such a small size? http://bugaru.com

But what is the normal engine operating temp for a 2.2 or 2.5. Is 190-200 normal for hot weather driving?

On a Subaru 2.2 or 2.5 N.A. under normal hot weather driving what should the water temps run at in Fahrenheit’s, what is normal operating temp range ? Also what is the correct temp thermostat to use? I'm considering converting to a Turbo. Do Turbo’s run hotter, if so at what temps? Thanks

Ok.. I hear you on the Turbo Block, but the 2.2 Turbo engine was only made for about 4 years and isn't easily found. As for the 2.0 I have one of those but hate to rape it. So it's on with the search for a 2.5 turbo, or maybe in my case convert one? By the way if anyone has any parts or an engine that they want to sell please feel free to let me know. Thnaks Jon