Welcome to the North American Subaru Impreza Owners Club Saturday August 1, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Subaru Conversions

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 01-28-2004, 07:32 PM   #1
WRX34
Scooby Specialist
 
Member#: 13364
Join Date: Dec 2001
Chapter/Region: MWSOC
Location: MI
Vehicle:
1996 GM8 caged,
99 V8 RSTi, 11' FXT

Default 1.8L Heads > 2L Block...doing something different

OK here's the deal. I have a 1.8L in an AWD Brighton. high mileage (140k ish). I wanna know if I can throw the 1.8 heads on the 2.0 block to raise the compression even more and if they'll bolt up. (for an NA setup)

MORE importantly...will the tranny match up even if I do a full EJ20/22/or 25 swap. Cuz I wanna put a new clutch in and don't wanna waste money on 2 clutches if I can use the same one?! Ya know.

Thanks if anyone has any clue/help.


WRX34
* Registered users of the site do not see these ads.

Last edited by WRX34; 01-28-2004 at 07:40 PM.
WRX34 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-28-2004, 08:47 PM   #2
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 W/EJ20K
Series 10 FRS

Default

um
1.8 10 to 1
2.0 (the one sold in north america anyway) 8 to 1
you theroy has holes

the tranny will fit but if you make more power the cluthc may slip
Jaxx is offline   Reply With Quote
Old 01-28-2004, 09:43 PM   #3
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

You want to put the 1.8 heads on a 2.0?

I think the 1.8 heads are the worst heads around.... with some of the lowet flow rates.
totoherbs is offline   Reply With Quote
Old 01-29-2004, 12:16 AM   #4
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: Mars
Vehicle:
2013 Subaru BRZ
Galaxy Blue

Default

Um, your idea sucks

Ej18 heads = just about the worst heads in terms of flow. http://community.webshots.com/album/110209915vXVzdU
Kostamojen is offline   Reply With Quote
Old 01-29-2004, 12:31 AM   #5
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

Quote:
Originally posted by Kostamojen
Um, your idea sucks

Ej18 heads = just about the worst heads in terms of flow. http://community.webshots.com/album/110209915vXVzdU


Its kind of hard to see the difference but...

Your ej18s
http://community.webshots.com/photo/...10210534peVNqK

large port v6 heads
http://www.pbase.com/image/23502311.jpg

small port uk heads
http://www.pbase.com/image/23502317.jpg
totoherbs is offline   Reply With Quote
Old 01-29-2004, 06:54 AM   #6
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

That's interesting, my phase 2 EJ18 heads are completly different. They look just like the SOHC EJ25 heads, plugs through the valve cover etc...
redwagon is offline   Reply With Quote
Old 01-29-2004, 07:50 AM   #7
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

Quote:
Originally posted by Jaxx
um
1.8 10 to 1
2.0 (the one sold in north america anyway) 8 to 1
you theroy has holes

the tranny will fit but if you make more power the cluthc may slip
When did the 1.8 get a 10:1 CR? It's been pulished as 9.5:1 since 1988.

Jay Storm
Storm is offline   Reply With Quote
Old 01-29-2004, 08:58 AM   #8
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

In my factory manual it says EJ18J = 10:1
redwagon is offline   Reply With Quote
Old 01-29-2004, 11:15 AM   #9
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 W/EJ20K
Series 10 FRS

Default

as does mine

and the 88 1.8 (ea) is nooooot the same as a 93 1.8 (ej)
Jaxx is offline   Reply With Quote
Old 01-29-2004, 11:52 AM   #10
Homemade WRX
Scooby Guru
 
Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: 3MI Racing LLC
Vehicle:
96 bastard child
search FIRST, then PM!!!

Default

my EJ18 is a 9.5:1
Homemade WRX is offline   Reply With Quote
Old 01-29-2004, 02:58 PM   #11
WRX34
Scooby Specialist
 
Member#: 13364
Join Date: Dec 2001
Chapter/Region: MWSOC
Location: MI
Vehicle:
1996 GM8 caged,
99 V8 RSTi, 11' FXT

Default

Well I was just trying to setup something different LOL. Oh well! I know a lot of Honda motors (like mini-me) etc. are able to raise/lower compression by doing this so I fig'd I'd ask since I know NOTHING about the EJ18. Thanks for the pics too, very big difference yes, but I was just seeing what wierd options I have as to play with compression on an NA scale, flow would affect the compression I'm sure which is why it's smaller heads = less flow = more compression? Or not...

As far as clutch slipping...I have a stock WRX clutch with like 1k miles on it for dirt cheap, which is my biggest concern right now as to if that will bolt up and it all looks like it will in theory! We'll see I guess! I think most Subaru motors will bolt up to it. Any thoughts on changing or keeping the gear ratios/final drive/diffs/etc out of the 96 EJ18 Brighton?

I think we'll drop my EJ20 from my WRX into the Brighton and maybe throw an EJ22 into the WRX. Any comments? Or you think going a built up 2.5 NA would be better?

Thanks again guys/gals.

WRX34
WRX34 is offline   Reply With Quote
Old 01-29-2004, 03:00 PM   #12
WRX34
Scooby Specialist
 
Member#: 13364
Join Date: Dec 2001
Chapter/Region: MWSOC
Location: MI
Vehicle:
1996 GM8 caged,
99 V8 RSTi, 11' FXT

Default

Quote:
Originally posted by redwagon
That's interesting, my phase 2 EJ18 heads are completly different. They look just like the SOHC EJ25 heads, plugs through the valve cover etc...
Hmmm...where did you get these/what are they off of? What is your current setup with this and yeah...more info the better. If you posted b4 lemme know and I'll search or if u have the link handy that's cool too.


WRX34
WRX34 is offline   Reply With Quote
Old 01-29-2004, 03:40 PM   #13
WRX34
Scooby Specialist
 
Member#: 13364
Join Date: Dec 2001
Chapter/Region: MWSOC
Location: MI
Vehicle:
1996 GM8 caged,
99 V8 RSTi, 11' FXT

Default

http://wac.addr.com/auto/obs/turbo/ejcalcs.html

After looking here I think I might keep the tiny 1.8 block and drop a 2.0 or maaaybe 2.2 head onto it, then put a pos stock turbo from my WRX in! Get around 8.5-8.7 compression maybe after that!?! HEHEHE BOOST! That could be fun and lightweight to boot!


WRX34
WRX34 is offline   Reply With Quote
Old 01-29-2004, 03:47 PM   #14
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

Quote:
Originally posted by WRX34
http://wac.addr.com/auto/obs/turbo/ejcalcs.html

After looking here I think I might keep the tiny 1.8 block and drop a 2.0 or maaaybe 2.2 head onto it, then put a pos stock turbo from my WRX in! Get around 8.5-8.7 compression maybe after that!?! HEHEHE BOOST! That could be fun and lightweight to boot!


WRX34
The 2.2 SOHC head is the same small thing as the ej18s. SOHC RS heads will flow good, more then the wrx heads.
totoherbs is offline   Reply With Quote
Old 01-29-2004, 07:15 PM   #15
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: Mars
Vehicle:
2013 Subaru BRZ
Galaxy Blue

Default

Quote:
Originally posted by redwagon
That's interesting, my phase 2 EJ18 heads are completly different. They look just like the SOHC EJ25 heads, plugs through the valve cover etc...
Is that the MY97 EJ18?
Kostamojen is offline   Reply With Quote
Old 01-29-2004, 08:19 PM   #16
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

Quote:
Originally posted by Kostamojen
Is that the MY97 EJ18?

Nope, it's MY'00.
redwagon is offline   Reply With Quote
Old 01-29-2004, 08:27 PM   #17
STi-Nismo Dood
Scooby Specialist
 
Member#: 4149
Join Date: Feb 2001
Chapter/Region: SCIC
Location: Frisco/Diego/LosAngeles
Vehicle:
MY93 Impreza 6MT
GC8.6 Aspen White

Default

good god!! they still made EJ18 for MY00??? I always thought they discontinued it since '97 and just used 2.2s. EJ18s do have the thickest side-walls though, 9mm as I was told.

-Vic
STi-Nismo Dood is offline   Reply With Quote
Old 01-29-2004, 08:39 PM   #18
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

It was still available here in Taiwan until MY'01, it may still be in Japan or some other market.
This is an EJ25, but my motor looks exactly the same:
http://www.specialtyauto.com/_border...DSUBENGINE.jpg
redwagon is offline   Reply With Quote
Old 01-29-2004, 10:34 PM   #19
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: Mars
Vehicle:
2013 Subaru BRZ
Galaxy Blue

Default

Wierd, whats the hp rating for that EJ18?
Kostamojen is offline   Reply With Quote
Old 01-29-2004, 11:03 PM   #20
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

In the book it's rated at 120ps, I forget the torque number right now.

Are there any numbers on the heads to identify them? I'm really curious to know if these are common with another motor. Mine are serial numbered 572368 & 9 respectively, dunno if that makes sense to anyone.

(edit)
Here we go:
120ps @ 5600
16kgm @ 4000
10:1 compression
Bore x stroke 87.9X75.0

It's phase 2, OBD-II compliant

By the look of it, it should be a straight swap with a late EJ25, plugnplay.

Last edited by redwagon; 01-29-2004 at 11:52 PM.
redwagon is offline   Reply With Quote
Old 01-29-2004, 11:51 PM   #21
STi-Nismo Dood
Scooby Specialist
 
Member#: 4149
Join Date: Feb 2001
Chapter/Region: SCIC
Location: Frisco/Diego/LosAngeles
Vehicle:
MY93 Impreza 6MT
GC8.6 Aspen White

Default

my motor is for OBD-I

10 HP for every .5 of compression increase... hmmm... at least theres better flow. hehe..

now I see how UDSM Fords do 12.5:1 and uhh yeah...

what's zat I've learned today? times doesn't make much of a difference from the intuition or ambition that you wanna do to your motor...

hey red, are u living in TW?? How'd you know about NASIOC?

-Vic
STi-Nismo Dood is offline   Reply With Quote
Old 01-30-2004, 12:14 AM   #22
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 W/EJ20K
Series 10 FRS

Default

Quote:
As far as clutch slipping...I have a stock WRX clutch with like 1k miles on it for dirt cheap, which is my biggest concern right now as to if that will bolt up and it all looks like it will in theory!
no that won't work
the clutch must match your transmission

all the n/a subarus sold in the US have push cluthces the wrx is a pull clutch
Jaxx is offline   Reply With Quote
Old 01-30-2004, 12:32 AM   #23
STi-Nismo Dood
Scooby Specialist
 
Member#: 4149
Join Date: Feb 2001
Chapter/Region: SCIC
Location: Frisco/Diego/LosAngeles
Vehicle:
MY93 Impreza 6MT
GC8.6 Aspen White

Default

is the legacy turbo a pull clutch also?
STi-Nismo Dood is offline   Reply With Quote
Old 01-30-2004, 01:17 AM   #24
RebelINS
Scooby Specialist
 
Member#: 2953
Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Rochester, MI, USA
Vehicle:
2000 Impreza 2.5RS
2005 Impreza WRX STi

Default

Quote:
It was still available here in Taiwan until MY'01, it may still be in Japan or some other market.
They didn't make an EJ18 in the US in 2000, The smallest Impreza motor in MY00 was the EJ22. The EJ18 in the US never went above 9.5:1 CR, either.

If you are going to stick with NA, but plan on doing an EJ25 swap, you should swap the trans two. Yours is geared for gas mileage (3.90 final drive), which I am sure would feel really slow with a NA EJ25. Not to mention that the RS transmission is hydraulically actuated, rather then cable driven.

-Wes
RebelINS is offline   Reply With Quote
Old 01-30-2004, 01:26 AM   #25
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: Mars
Vehicle:
2013 Subaru BRZ
Galaxy Blue

Default

Quote:
Originally posted by redwagon
In the book it's rated at 120ps, I forget the torque number right now.

Are there any numbers on the heads to identify them? I'm really curious to know if these are common with another motor. Mine are serial numbered 572368 & 9 respectively, dunno if that makes sense to anyone.

(edit)
Here we go:
120ps @ 5600
16kgm @ 4000
10:1 compression
Bore x stroke 87.9X75.0

It's phase 2, OBD-II compliant

By the look of it, it should be a straight swap with a late EJ25, plugnplay.
Hmm, interesting... I would think it would be more related to the more recent N/A EJ16's and N/A EJ20's from over seas rather than the EJ25 though.
Kostamojen is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
N/A setup with a 2.2L block and 1.8L heads (reliability questions) KillerBumbleBee Normally Aspirated Powertrain 4 08-24-2012 03:02 PM
My headlight mod- I tried to do something different cky211 Interior & Exterior Modification 54 05-21-2004 02:19 AM
1.8L vs 2.2L, what do you think? evorev Normally Aspirated Powertrain 26 01-12-2004 11:59 PM
('93-'01) Differences between 1.8L & 2.2L AWD Impreza 95+ Subdued Impreza Forum 26 05-13-2003 08:40 AM


All times are GMT -4. The time now is 02:58 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.