|
|
|
|
Thread Tools | Display Modes |
03-28-2007, 12:34 AM | #1 |
Scooby Newbie
Member#: 54820
Join Date: Feb 2004
Chapter/Region:
South East
Location: western N.C.
Vehicle:1998 2.4 RS-T hybrid\stroker |
what head gasket did you use on your EJ22t hybrid?
ok I'm doing the 2.5rs dohc on the ej22t hybrid and I know that the factory ej22t gasket is supose to be 7.4:1 c/r and using the 2000 model sohc legacy gasket is supose to bump it up to 8.0:1c/r according to http://wac.addr.com/auto/obs/turbo/ejcalcs.html,
but I have also read somewhere that there was some sort of pfoblem using the thinner 2000 model gasket, so who knows anything about this problem or of any solutions that could get my c/r a little above 7.4:1 and yet I really dont want it as high 8.5:1 either
* Registered users of the site do not see these ads.
|
03-28-2007, 11:51 AM | #2 |
Scooby Specialist
Member#: 89599
Join Date: Jun 2005
Chapter/Region:
RMIC
Location: middle of nowhere, wyoming
Vehicle:1995 95 Impreza red |
Why not 8.5:1? That is what I had my pistons made to for this exact hybrid. I am going with the stock 2.2T headgasket for my setup. It somehwere around here that the pistons come out of the block just a tiny bit. Lots of guys run with the 2.2t headgasket and the low compression but push 20+ boost all day long without any problems... provided engine decent management
|
03-28-2007, 12:07 PM | #3 |
Scooby Newbie
Member#: 137105
Join Date: Jan 2007
Chapter/Region:
MWSOC
Location: midwest
|
I was thinking I will probably go with a thin cometic from axis racing. They have them custom made for this setup. I haven't gotten that far in the build as of yet. I don't know the thickness or the compression ratio they will yield with your exact setup. Give Axis a call and if you don't mind, post the thickness ect if you get exact numbers.
|
03-28-2007, 01:10 PM | #4 |
Scooby Newbie
Member#: 54820
Join Date: Feb 2004
Chapter/Region:
South East
Location: western N.C.
Vehicle:1998 2.4 RS-T hybrid\stroker |
see thats the difference right there though I plan on keeping the stock pistons I mean why go after market when the block comes with everything you need its not like Im tryin to make over 500whp or anything but the 8.0:1 is just sort of that security blanket of protection but just high enough to where it will spool quickly, but yeah the stocks only go to 7.4:1 with the factory gaskets maybe I'll look into those from axis the only thing with that is I was told by a suby tech that they use only factory gaskets in there build but Im not to sure what to make of that
|
03-28-2007, 02:45 PM | #5 |
Scooby Newbie
Member#: 137105
Join Date: Jan 2007
Chapter/Region:
MWSOC
Location: midwest
|
What do you mean the block comes with everything you need? You're not reusing the head gaskets obviously and you are prepared to buy the thinner gaskets so what is the difference. The cometic are only around 150. Don't get me wrong. I'd love a cheaper alternative. Maybe someone who has already done this wil chime in....please!
|
03-28-2007, 07:16 PM | #6 |
Scooby Newbie
Member#: 54820
Join Date: Feb 2004
Chapter/Region:
South East
Location: western N.C.
Vehicle:1998 2.4 RS-T hybrid\stroker |
no you got me all wrong its not the money thing at all its just what I was told that thry used only factory gaskets not sure why he didnt say and I didnt ask
|
03-29-2007, 01:52 PM | #7 |
Scooby Newbie
Member#: 2204
Join Date: Aug 2000
Location: Tacoma, WA. USA
Vehicle:99 Rally Impreza team graphics |
I'm sure what they meant by factory gaskets is ones made by Subaru.
I'd recommend the phaseII 2.2 gasket for this build up. I've run the phaseII 2.5 gaskets and they're really thin (keeps the compression a bit higher). The only possible concern is the piston to head clearance (mine never had a problem though). Hope this helps - Eric |
09-05-2007, 11:37 PM | #8 |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
I was afraid of the piston head clearance because the EJ22T pistons come OUT of the block a tiny bit. I used the '97-'98 EJ22E HG. They are the same 3-layer HG as the WRX and look to be the SAME thickness.
The WRX pistons leaves a tiny bit of room on the OUTER part of the piston and the head where it's NOT dished in. The EJ22T's pistons come UP a TINY BIT and comes REALLY CLOSE to the head with the '97 EJ22E HG. This still makes a good CR. I'm not SURE where I'm at....what do you guys think? EJ22T SB w/ USDM WRX heads & WRX thickness '97 EJ22E HG. |
09-05-2007, 11:49 PM | #9 |
Scooby Specialist
Member#: 89599
Join Date: Jun 2005
Chapter/Region:
RMIC
Location: middle of nowhere, wyoming
Vehicle:1995 95 Impreza red |
What should be left for clearance between the head and piston? I have forged JE's THat are based off the 22t stock piston ( slighlty shroter skirt and different dish to make 8.5:1 Compression with Dual cam 2.5 heads and the stock 22t headgasket) I am considering using the phaseII 2.2 headgasket now with the above set up, and trying to figure out the compression ratio and figure out if I have enough clearance to do so. Estimate 8.8-8.9:1 Compression ratio that way? am I terribly far off here?
|
09-06-2007, 12:01 AM | #10 |
Scooby Specialist
Member#: 99140
Join Date: Oct 2005
Chapter/Region:
E. Canada
Location: YUL
Vehicle:GD Racing chassis Slowly in construction |
There is a few CR calculator links in this thread.
http://forums.nasioc.com/forums/show...hlight=genious |
09-06-2007, 12:55 AM | #11 |
Scooby Guru
Member#: 64673
Join Date: Jun 2004
Chapter/Region:
NWIC
Location: portland
Vehicle:1990 Legacy wagon goes 12.387 @ 116.5 |
I have no idea where this leaves compression ratio, quench and what not, but I have lately been using metal 3 ply Subaru branded 2.5 gaskets on my 2.2 blocks with 2.0 heads..... This is because I could no longer get the 3ply metal ej22t gaskets....
|
09-06-2007, 01:09 AM | #12 |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
The '97-'98 EJ22E HG is a 3-layer HG which appear to be the SAME thickness as the USDM WRX EJ205. The EJ22T composite HG is abouts 3 times the thickness of the 97-98 EJ22E HG. The piston DID come really close to the top of the HG at TDC.
|
09-06-2007, 04:31 PM | #13 |
Scooby Specialist
Member#: 132130
Join Date: Nov 2006
Chapter/Region:
TXIC
Location: Austin, Texas
Vehicle:2002 Ford F-150 Graphite Gray |
i think alot of people use the 2001 EJ22E headgasket..
|
09-06-2007, 04:48 PM | #14 |
Former Vendor
Member#: 139767
Join Date: Feb 2007
Chapter/Region:
NWIC
Location: Seattle, WA (Green Lake)
|
I used STi headgaskets and my piston to head clearance was about...
... uh... hmm... .000" The car actually ran great for months. But when I pulled the motor apart after a bearing failed (gee wonder why) I noticed that there had been contact on every piston to the head. There was ZERO carbon buildup on the piston surface that matched the head surface. It was shiney, slightly pitted and kinda flattened.... woops. i used the factory ej22t pistons. Therefore I recommend using a headgasket that will give you at least .035" head to piston clearance. Also, just want to add that by "ran great" I mean that it had a very good topend and decent mid range. However, the low end blew goat balls. I'd highly recommend going with an aftermarket piston. It just wasn't worth the labor getting the block in the car for the lack of performance. I was running a T3/T4 so that had a bit to do with the lag. OH GOD THE LAG that was my first subaru engine build ever some years ago. You live and learn I guess. Also, 8.5:1 is a great compression ratio. Don't be afraid of that one. I run 9 or higher in all my engine builds... of course, all my builds have water/alky injection. If it's just a pump gas motor with no injection, I'd target 8.2 to 8.7. -Dominic Last edited by R & H Garage; 09-06-2007 at 04:53 PM. |
09-07-2007, 01:12 AM | #15 |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
How thick is that STi HG compared to the WRX one?
|
09-07-2007, 01:52 AM | #16 |
Scooby Specialist
Member#: 89599
Join Date: Jun 2005
Chapter/Region:
RMIC
Location: middle of nowhere, wyoming
Vehicle:1995 95 Impreza red |
THe sti hg is the same thickness as the stock 2.5 Sohc head gasket. I just dont remember the actual thickness. But I used the STi HG when the originals went out on my 2001 RS
|
09-07-2007, 11:26 AM | #17 |
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region:
MWSOC
Location: St. Paul, MN
Vehicle:MY99 GF4 JDM 6spd NF Performance |
really..... The SOHC 2.5RS HG is a 1-layer gasket. My '99 2.2L SOHC was a 1-layer as well (phaseII stuff). I know that 2.5L DOHC run a 5layer, 2 outer being thin and the middle being the BIGGER layer.
|
09-13-2007, 07:53 AM | #18 |
Scooby Newbie
Member#: 96699
Join Date: Sep 2005
|
If itīs any good for someone building a EJ22T engine, I have got 0.6mm thick gaskets lying in my cellar, due to needing now a thicker gaskets, as I had to change rods from short ones to stock length!
Just let me know, my email: [email protected] Greets Markus |
09-13-2007, 10:16 AM | #19 |
Scooby Specialist
Member#: 71348
Join Date: Sep 2004
Chapter/Region:
RMIC
Location: Denver CO
Vehicle:1999 EJ207 RS.TI |
I have a EJ22t stroker setup 2.35L. I am intending on using STI head gaskets, with WRX heads. I think I will be ok since the Wiseco pistons have larger valve clearances but I will be testing this with clay before I finish the build.
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
What 12V source did you use for your WI kit? | efmd3 | Water/Methanol Injection, Nitrous & Intercooler Cooling | 12 | 06-25-2008 03:35 PM |
Which bumper beam did you use on your JDM GC8 front bumper conversion? | GC84ever | Canada Region Forum | 10 | 06-13-2007 08:27 PM |
Which bumper beam did you use on your JDM GC8 front bumper conversion? | GC84ever | Vancouver Impreza Club Forum -- VIC | 13 | 06-11-2007 12:59 AM |
What % APR did you get on your STi Loan? | mattjk | Off-Topic | 31 | 09-02-2004 06:54 PM |
('93-'01) What kinda wax do you use on your Blue ridge pearl RS | 2.5rsMI | Impreza Forum | 6 | 07-17-2001 08:27 PM |