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#Notes on the Ej22T!! - More info added!!

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PostPosted: Mon Dec 15, 2003 1:54 am 
quasi-mod-o
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ciper wrote:
Somewhere in this thread it mentions that the compression ratio for ej20 heads on an ej22t is 7.5:1 . I think that is wrong.

read this thread viewtopic.php?t=14511


If you are talking about Marc's remarks about a 7.5:1 CR on his car I think he is correct, for his vehicle. But keep in mind his car has EJ25 DOHC heads and he has custom pistons. He chose his CR...

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PostPosted: Mon Dec 15, 2003 2:12 am 
Third Gear
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also, DOHC 2.5l heads has 46cc chambers, wich makes 7.4:1 CR, but 2.0l DOHC heads has 49cc chambers, wich makes 7.21:1 CR.

dont get confused ! hehe

numbers taken from various websites, especially EjCalcs.

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 Post subject: Re: Notes on the Ej22T!! - More info added!!
PostPosted: Tue Feb 17, 2004 10:30 pm 
Fourth Gear
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Location: Colorado
Quote:
My name is Mark Ramirez, not Alan. PDM turbos has pictures of my engine bay on their website, although the text description of what is actually in my car is very inaccurate. 90% of the work on my car has been done by me in my own shop. PDM has been a great help in a lot of the work (i.e. welding and tube bending), but as far


Who is this guy. I want a damn ride. :shock:

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PostPosted: Wed Apr 21, 2004 6:45 am 
First Gear
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so, has anyone here tried phase I dohc heads on a turbo legacy block?

What other parts would I need to make this work? Obviously new timing belt, intake manifold, etc...internally though are new rods/crank neccesary?

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PostPosted: Tue Aug 03, 2004 8:39 am 
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Joined: Mon Feb 17, 2003 4:20 am
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Location: New Zealand
Yeah heaps of ppl have P1 heads and a turbo block, its called a EJ20G, my car has one :)

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PostPosted: Tue Oct 12, 2004 8:34 pm 
quasi-mod-o
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EJ20TMAN wrote:
Yeah heaps of ppl have P1 heads and a turbo block, its called a EJ20G, my car has one :)


He asking about phase I EJ25 heads. Different market. But it is a little known fact around here that USDM phase I DOHC EJ25 heads use the same cores as 1998 JDM EJ20K heads.

Aspect,
You need to re-read this from the first post. Xehpyr uses those exact heads and gives you most of the detail required for this set up.

One last thing that I have mentioned elsewhere, but want to put in the sticky. I have empirically verified that the EJ22T block and the 22b blocks are abolutely NOT the same. Not just the internals, but the cores are totally different. I chatted with a UK fellow who owns a 22B and has rebuilt his own engine. He verified for me that the 22B is a phase II block with the thrust bearing moved to the end, not centered like th EJ22T block. Furthermore, it was cast without the oil squirters. They are not capped, they just plain don't exist on the cast. And lastly, it is not an overbored EJ20. His block says EJ22 right on it. Thus endeth the lesson... :wink:

_________________
1974 Porsche 914 Cam Am Limted Edition AKA the Bumble Bee
1973 Porsche 914 2.0 l -Suby swap pending
1968 Porsche 911t survivor 47k original miles
2000 2.5RS daily driver.
1999 2.5RS w/ 50+ extra whp
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 Post subject: But...but...Phase 1 crank, rods, heads on 22t unresolved
PostPosted: Tue Aug 29, 2006 6:47 pm 
First Gear
Joined: Thu Jan 08, 2004 4:37 pm
Posts: 128
Tried not to post this but I'm still getting conflicting information after trolling all this thread, any related thread I can find, and the "library" section on the main page. So I'll try to ask the questions that have been posted before but answered with other questions:

1. Is Phase 1 2.5L crank a direct bolt-in in the 91-94 USDM EJ22t? I think this is what has been said, just confirming here.

2. Is it necessary to use the Phase 1 rods as well? I presume so, but I don't see any obvious reasons the EJ22t rods might not work.

3. (here's an area where posts differ every time): Are the Phase 1 2.5L DOHC heads a bolt-on for the 91-94 USDM EJ22t? The posting in the "library" section says only Phase 2 2.5L DOHC heads will work, but intelligently details all the reasons not to use them anyway. Now in thie thread people are talking about the Phase 1 heads as bolt-on. Are they? And do they suffer all the same disadvantages as the Phase 2 heads, namely a larger bore, wrong cams for turbocharging, and slightly misaligned coolant passages?

4. When is the Phase 1/Phase 2 threshold? Some people say when it went DOHC to SOHC(?!). Some say when it went interference with a reshaped piston crown. Some say when the thrust bearing moved from the center of the crank to the end (or vice-versa?). Did these all happen at the same time? I don't think so. I _think_ the dates are 1997, 1997, and 1999 respectively. But then I see that the premium fuel required on the 1996 2.5L Outback was dropped for 1997. Um, does this imply a drop in compression? Huh? 2.5L got 10 more horses at the same time. So....confused.

And here's the why Im interested: one of my (now three) EJ22t just spun a bearing. So I'm rebuilding, and I have access to a NA 2.5L out of a 1997 Outback. Should I, taking the received wisdom of this board, grab the 2.5L crank and rods (although apparently inferior material(?), but for a 2.35L displacement)? And to my knowledge, a never-answered, important question: will the stock 91-94 USDM EJ22t pistons work with this setup, both in terms of head interference and a sensible compresison ratio?

Here's the only wisdom I can offer, from experience with stroker motors: even a little displacement, especially in the stroke, matters, and especially at high boost. Torque goes up a lot.

Sorry, I thought those questions would be short...

ACP

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 Post subject:
PostPosted: Wed Aug 30, 2006 7:52 pm 
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Please refer to this thread. viewtopic.php?t=25770&highlight=ej22t+dohc

I think it makes the article in the library obsolete.
If you have any questions on the head swap, please post it in that thread.

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 Post subject:
PostPosted: Wed Aug 30, 2006 8:06 pm 
First Gear
Joined: Thu Jan 08, 2004 4:37 pm
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OK - that thread deals with the heads. Thanks. Now how about the crank, rod, piston, and "phase" questions?

Thanks for pointing me to the thread though - deals with the heads well. Although even there "Matt" is saying you need Phase 2 head - obviously not, then...

ACp

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 Post subject:
PostPosted: Wed Aug 30, 2006 9:26 pm 
Second Gear
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In 99(00 for the legacy) we saw the 2.2 and the 2.5 change to Phase II.

On both the 2.2 and 2.5 the Phase II changes were as follows:
1. The engine and the transmission are fastened with 6 bolts
and 2 studs.
2. The thrust bearing has been moved to the number 5 position.
3. Oil groove in the number 1 and 3 have been changed to
supply additional lubrication to the crank journal.

And Yes thats when the 2.5 went to SOHC.

In 97 both the 2.2 and 2.5 saw some "Enhancements"

Both got new pistons which put comp to 9.7 to 1
The pistons were moly coated and piston clearances were reduced by increasing the diameter of the piston.

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1997 White BG Ltd 5MT, EJ22T with Wiescos, EJ20R Heads, Two large dents R.I.P
1995 Impreza EJ22T DOHC Hydra EMS, 20g, EWG, 3in APS TBE, AWIC


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 Post subject:
PostPosted: Wed Aug 30, 2006 10:36 pm 
First Gear
Joined: Thu Jan 08, 2004 4:37 pm
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Awesome! Now I get it. Thanks.

Remaining questions:

Does the Phase 1 2.5L crank swap require 2.5L rods? (It must, no?)

Does it require different pistons, or can the EJ22t pistons be used?

With the EJ22t sohc heads and pistons nd headgasket, and the 2.5L crank and rods, anyone know the compression ratio?

Thanks again,
ACP

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1991 Legacy SS 5MT Rally car (sold)
1993 Legacy SS 5MT Street car (selling)
1997 Lancer Evo IV RS Rally car (sold)
2006 Lancer Evo IX RS Rally car
2009 Lancer Evo X RS Rally car
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 Post subject:
PostPosted: Thu Aug 31, 2006 3:38 am 
Fourth Gear
Joined: Fri Oct 03, 2003 6:22 pm
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Location: Fargo, ND
musketeerracing wrote:
Awesome! Now I get it. Thanks.

Remaining questions:

Does the Phase 1 2.5L crank swap require 2.5L rods? (It must, no?)

Does it require different pistons, or can the EJ22t pistons be used?

With the EJ22t sohc heads and pistons nd headgasket, and the 2.5L crank and rods, anyone know the compression ratio?

Thanks again,
ACP


i believe JB Niday has a 2.35 motor in his impreza you should PM him over on the RA site. maybe he would be able to help you out.

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 Post subject:
PostPosted: Fri Mar 30, 2007 1:58 am 
In Neutral
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i have a ej22t and i will like stroke the bloc with ej25 crank,rod and 97.5mm of bore, but i search a compression awrond 8.5, 8.6:1, what is the better combination????

i will instal the bloc on sti ver7 head

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PostPosted: Tue Jun 17, 2008 4:50 am 
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...


Last edited by yazmo on Thu Oct 01, 2009 10:20 pm, edited 1 time in total.

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PostPosted: Tue Jun 17, 2008 5:36 pm 
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Yes you need to run premium.

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