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Wed Apr 25, 2012 8:06 am

Thanks, that makes sense in this context.

Wed Apr 25, 2012 2:29 pm

Farfrumwork wrote: ^^shorter rods (by .050") help keep the compression ratio in check. I think it would also alter the rod angle, but the CR is the main effect.

r39o - the 255 block (used in wrx and legacy gt models) would yield a slightly lower CR vs the the 257 block (sti). I would go for the 255, unless you want to build an even more-frankenmotor like Frankensubysyncro describes (with new rods). Either rod setup should hold a NA application like this.

Personally I'd look for a used 255 or 257 block and have it rebuilt (stock) if needed, then throw some 2.2 heads on it (my plan for next winter).

Does anyone have or know of a table that has the the block designation ie 255 or 257, years available, rod size, piston size, type of lifters, bore, stroke, etc?

My engine is a 2004 SOHC with stock rods and pistons. The only upgrades are the 11mm oil pump and Delta Camshafts. I don't notice any idle lope like I have heard about with the 2.2s with custom camshafts. I got the 1000 grind for more low end torque.

Wed Apr 25, 2012 4:43 pm

cvbill wrote: I have had Ken's hi-brid for about 3 months now, love it. took it to Syncrofest and have only two words for it - TORQUE MONSTER. Took the hard way up out of the Quarry and up Fremontia to Hector Hights, no wheel spin, no clutch needed- laughing all the way- four times!
Ken asked me when doing the rebuild- do you want torque or horsepower? I said torque and he put in shorter rods, big oil pump (75 psi @65mph, 30psi @ 900rpm idle, hot engine, 10-30 Mobil 1)
Engine uses 87 regular gas
Happy Camper, CVBILL
That is one of the reviews I was looking for. I wanted to ask to drive your van around at SF shortly after i drove the Buslab land hopper but we were both too busy having fun.
The lower compression motor that can run regular gas and has more torque sounds like a good combo.

Wed Apr 25, 2012 4:50 pm

FrankenSubySyncro wrote: The only upgrades are the 11mm oil pump and Delta Camshafts. I don't notice any idle lope like I have heard about with the 2.2s with custom camshafts. I got the 1000 grind for more low end torque.
Good to know that the cam grind lope mellows out in this combo. I am interested in going with their 1000 cams but can do without the tell tale cam lope.

Wed Apr 25, 2012 9:46 pm

syncrodoka wrote: FrankenSubySyncro wrote: The only upgrades are the 11mm oil pump and Delta Camshafts. I don't notice any idle lope like I have heard about with the 2.2s with custom camshafts. I got the 1000 grind for more low end torque.
Good to know that the cam grind lope mellows out in this combo. I am interested in going with their 1000 cams but can do without the tell tale cam lope.

Just to be clear, I wouldn't suggest the Delta cam shafts in the 2.2 heads or hybrid motor. I don't have any first hand experience with the loping in the 2.2 just heard of it. Warren Chapman tried it in a stock 2.2 and didn't like it. You can read about it more over on the subaruvanagon yahoo list. You are getting more torque already with the hybrid motor.

Mine is a 2004 2.5 SOHC all the way from block to heads to wiring. I tore down the motor and Ken rebuilt the block and showed me how to do the heads. The case was sent out to a machine shop and we did the rest at Ken's. He has also been building WRX motors for the racers. He can rebuild any 2.2 or 2.5.

Wed Apr 25, 2012 9:53 pm

Ok, thanks for getting my head in the right direction.

Wed Apr 25, 2012 10:09 pm

FrankenSubySyncro wrote: Farfrumwork wrote: ^^shorter rods (by .050") help keep the compression ratio in check. I think it would also alter the rod angle, but the CR is the main effect.

r39o - the 255 block (used in wrx and legacy gt models) would yield a slightly lower CR vs the the 257 block (sti). I would go for the 255, unless you want to build an even more-frankenmotor like Frankensubysyncro describes (with new rods). Either rod setup should hold a NA application like this.

Personally I'd look for a used 255 or 257 block and have it rebuilt (stock) if needed, then throw some 2.2 heads on it (my plan for next winter).

Does anyone have or know of a table that has the the block designation ie 255 or 257, years available, rod size, piston size, type of lifters, bore, stroke, etc?

My engine is a 2004 SOHC with stock rods and pistons. The only upgrades are the 11mm oil pump and Delta Camshafts. I don't notice any idle lope like I have heard about with the 2.2s with custom camshafts. I got the 1000 grind for more low end torque.

I didn't find a table but I did find most of the info I was looking for. Thought I would share since there is all this motor talk.
http://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ25
http://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ22

Fri Apr 27, 2012 7:14 pm

'99 EJ25 with 2.2 heads and rods. I am $160 in so far. :o
The 911 muffler with the ricer tip in the back is going on too. Vroom vroom :lol: :lol:
The shortblock had gobs of compression when manually cranking it but I am going to tear it apart anyways, these look simple compared to rebuilding aircooled motors. I might source a JDM 12mm. oil pump for it as well, dunno yet.

Tue May 01, 2012 11:18 am

syncrodoka wrote: I might source a JDM 12mm. oil pump for it as well, dunno yet.

You can get the 12mm oil pump from Outfront Motorsports. They also have the engine to transmission adapter plates and many other builder parts for subarus.

http://www.outfrontmotorsports.com/map.htm
They don't show the oil pumps on the website but you can call them to order one. I think the 11mm pump is significantly cheaper though.

Tue May 01, 2012 11:41 am

SCORE!

syncrodoka wrote: '99 EJ25 with 2.2 heads and rods. I am $160 in so far. :o

Tue May 01, 2012 2:31 pm

So, what's wrong with it???

Farfrumwork wrote: SCORE!

syncrodoka wrote: '99 EJ25 with 2.2 heads and rods. I am $160 in so far. :o

Tue May 01, 2012 2:38 pm

r39o wrote: So, what's wrong with it???

Looks like a motor from Pick-N-Pull (along with the price), so who knows? :wink: Good score, BTW!

Most of the Legacys I see there have around 250k on the ticker, but it usually looks like the cars ended up there for something other than the engine.

I'm also considering a frankenmotor, but I think I will go the JDM route, and leave the bottom end alone.

Tue May 01, 2012 4:14 pm

r39o wrote: So, what's wrong with it???

It is a junk yard motor with 116K on it but the factory cross hatch marks are still very obvious. I looked over the head gaskets carefully and they looked fine as well and they will be replaced with the improved version.
The heads and rods came from a different motor with similar mileage and they look fine as well.
It is already apart and stripped and I am looking for a machine shop today.

Tue May 01, 2012 4:16 pm

FrankenSubySyncro wrote: syncrodoka wrote: I might source a JDM 12mm. oil pump for it as well, dunno yet.

You can get the 12mm oil pump from Outfront Motorsports. They also have the engine to transmission adapter plates and many other builder parts for subarus.

http://www.outfrontmotorsports.com/map.htm
They don't show the oil pumps on the website but you can call them to order one. I think the 11mm pump is significantly cheaper though.
THANKS!!

Tue May 01, 2012 5:22 pm

By the way, cometic makes gaskets for the hybrid 2.5 block and 2.2 heads. You can order any thickness to match your desired cr.
Paul

Tue May 01, 2012 9:23 pm

Very cool developments here, especially for california vans! What van is this going in? Is it going to be working with a kennedy kit or a bellhousing setup? Really exciting developments, thanks for sharing, my syncro needs a new heart with a little more oomph than a 2.2 - I think you're onto something.

Wed May 09, 2012 11:01 pm

These motors are stout.
The (116k)EJ25 shortblock passed inspection by the machinist and the (160k)EJ22 heads passed pressure testing and new valve stem seals were swapped in. The (160k)EJ22 rods on the big ends are 0.001" out of round so I am having them machined but the small ends are still within spec. I am going to get new pistons because they are a little scuffed but some bearings, HG and seals and this thing should be good to go.

I am going to run it in the truck until it is broken in then it will happily live in another project car.

Anybody else have some helpful tips before this thing gets put together?

Wed May 09, 2012 11:21 pm

I thought this was all about putting 2.2 heads on the 2.5?

Wed May 09, 2012 11:26 pm

Correct, I fixed my typo on the heads.
It will be built up as a 2.5 short block with 2.2 rods and heads.

Fri May 25, 2012 11:46 pm

very cool.
got sidetracked and forgot about this thread.

I'm glad someone on here is going for this. I've been thinking about it, need to find some space and some time.

Are you going with turbo pistons?