Welcome to the North American Subaru Impreza Owners Club Thursday July 10, 2014
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 > Normally Aspirated with bolt-on Forced Induction Powertrain

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 04-16-2002, 12:58 PM   #1
wighti
Scooby Newbie
 
Member#: 15345
Join Date: Feb 2002
Location: New Jersey
Vehicle:
2001 2.5RS GC6 sedan
S.T.M.

Default H6 swap Questions??

I was wondering how hard would it be to swap my MY01 sedan engine for a H6.
I was told that they only come with automatics. TRUE??
I know that Posches come with flat 6s' and manual trannis'.
Could I use that?

Or should I just build up my 01' SOHC?
* Registered users of the site do not see these ads.
wighti is offline   Reply With Quote
Old 04-16-2002, 01:03 PM   #2
DoctorNick
NASIOC Supporter
 
Member#: 7022
Join Date: May 2001
Vehicle:
heh, chulooz
is on my ignore list

Default

I don't know if the H6 would fit but your looking at a full ecu and motor swap. And with the H6 Being such a new motor to the scooby market...it would be cheaper to go with the svx 6 cyl...just forwarning. you looking at a big project ahead of you. Don't let the naysayers say it would be to expensive (it will NOT be cheap) or the naysayers say that it can't be done...because someone has to be the first. If your willing to spend that cash and then in the end have a h6 and a cut up car that won't run...then go ahead.
-Neal
DoctorNick is online now   Reply With Quote
Old 04-16-2002, 01:04 PM   #3
DoctorNick
NASIOC Supporter
 
Member#: 7022
Join Date: May 2001
Vehicle:
heh, chulooz
is on my ignore list

Default

I personally say the ej25 is a good motor. You get the right internals, correct turbo, good engine management and a gear set that can hold. You can end up with a beast that would be a very competive machine...
-Neal
DoctorNick is online now   Reply With Quote
Old 04-16-2002, 04:03 PM   #4
adamsrs
Scooby Specialist
 
Member#: 3768
Join Date: Jan 2001
Location: Seattle, WA
Default

Well SVXs only came in auto. And the new H6s only come in auto. Just like I already told you SEAN! lol. I am sure that it will fit, BUT, you will neeed the ECU, Motor, Tranny, Crossmembers, and mayb e steerign rack, and other engine bay parts... Not worth it IMHO. And the Porsche tranny wont work BECAUSE like i already told you, a Porshce is a rear motor rear drive car. So if you used it your car would have to either be made FWD, or RWD, or if you shelled out like 10k for a Porsche AWD tranny then MAYBE after you swapped out the floorpan you could run it.
adamsrs
adamsrs is offline   Reply With Quote
Old 04-16-2002, 04:57 PM   #5
XT6Wagon
Scooby Specialist
 
Member#: 524
Join Date: Nov 1999
Location: WA
Vehicle:
04 STi
White

Default

Adam, The SVX motor should bolt up to the tranny and work in the factory engine crossmember. Thats if both use the same engine mount style (round or square). I don't know about the H6 as the engine mount may have changed.

You will need the H6, engine harness, ECU + mic parts like maf.

I'd reccomend a switch to a B4 RSK/GTB 5spd tranny with a uprated organic clutch.
XT6Wagon is offline   Reply With Quote
Old 04-17-2002, 10:30 AM   #6
wighti
Scooby Newbie
 
Member#: 15345
Join Date: Feb 2002
Location: New Jersey
Vehicle:
2001 2.5RS GC6 sedan
S.T.M.

Default

ADAM!--I know we talked about this but, I just wanted some ideas and opinions from more than one person.

I pic everybodies brain until I figure out the best way to go.
wighti is offline   Reply With Quote
Old 04-17-2002, 01:34 PM   #7
ac_gohan
Scooby Specialist
 
Member#: 1903
Join Date: Jul 2000
Location: Bay Area, I-Speed Tech
Vehicle:
2000 2.5 RS-T coupe
T3/04 Link'd 2 10 PSI

Default

LOL yeah i would go with the svx motor as well, or just modify your ej25. Also you should consider swaping to a usdm ej20. A couple guys here down in CA can do it. I have heard that the exhaust runners for the new H6 are not designed that well. So it might be difficult to modify it. Also with the EJ series engines you would have a lot more room to work with. The engine plus all the extra parts needed for the H6 transplant could get you a ej20 swap and some. Just my $0.02


Andy
ac_gohan is offline   Reply With Quote
Old 04-17-2002, 06:34 PM   #8
adamsrs
Scooby Specialist
 
Member#: 3768
Join Date: Jan 2001
Location: Seattle, WA
Default

Well the reason I said that the tranny would have to be swapped is because when Subaru developed the SVX they did not have a tranny made that would be strong enough to hold th power that the SVX puts out. Thus putting a stock RS tranny in there you will have to be very careful or you will break it.
adamsrs
adamsrs is offline   Reply With Quote
Old 04-18-2002, 08:22 PM   #9
PeterJ
Scooby Newbie
 
Member#: 14727
Join Date: Jan 2002
Vehicle:
2002 impreza RS

Default go for it!

I've been researching this myself and I'm positive it will work...even though it's also an auto to manual swap. You need a crashed outback though..as others have already noted the random parts that will be needed (and the fuel pump?). Anyway, by my calculations, if you put the H-6 in a 2002 RS then, the 212 hp plus the extra weight (motor, Xmember, etc.) will make the car feel as it would with 200-205 hp before the swap. 18 lb/hp before, 14.5 lb/hp after. Just more info to consider...
PeterJ is offline   Reply With Quote
Old 04-19-2002, 01:18 AM   #10
wighti
Scooby Newbie
 
Member#: 15345
Join Date: Feb 2002
Location: New Jersey
Vehicle:
2001 2.5RS GC6 sedan
S.T.M.

Default

See....that's why I want to try this. I mean I could have the heads worked and add an exhaust,turbo, and FMIC. That would probably put me over 300hp running maybe 7psi.


BTW....I think it will be a few years before I attemp this. Right now I'm just going to work on my car and engine. Then when I have the money and a LOT more experience I'll buy a spare car
and go to town. (with some help...I hope).
wighti is offline   Reply With Quote
Old 04-19-2002, 11:56 AM   #11
RageHardIntoTheBendies
Scooby Specialist
 
Member#: 1532
Join Date: May 2000
Location: Wnnipeg, MB, Canada
Vehicle:
1999 RS, Silverthorn
www.zucru.com

Default

the H6 from an SVX will fit, Forced Air Tec has done it.
RageHardIntoTheBendies is offline   Reply With Quote
Old 04-19-2002, 09:54 PM   #12
Jack
Add Lightness
Moderator
 
Member#: 13699
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Hopkinton, MA
Vehicle:
2007 Lotus Elise
(From General)

Default

H6 in an RS. This sounds like a great project! Some things to consider are that indeed you'd have the engine mgmt out of a "donor" outback. I don't know enough about how the mating is with the H6 and the RS tranny, but it is always possible to make the mate. Worst case, you'd need to have a tranny intake shaft modified or made, depending on how the flex plate is mated on the H6, a flywheel would need to be chosen, modified and perhaps balanced to the engine (I know 5.0's, not subies). The mating of the tranny to the block, if not a direct bolt up may require some custom fabrication. The biggest stumbling block might be the fact that you'd be tying up an RS for a while.

Assumptions:

1) a stronger tranny already exists (since there are so many RS-T's)
2) stronger diffs would eventually be swapped in
3) supercharger would make this a real competitor for anything out there.

This is interesting. I'll have to do some engine compartment measurements on our outback and RS. Anyone else looking for a project?

jack

Last edited by Jack; 04-19-2002 at 09:59 PM.
Jack is offline   Reply With Quote
Old 04-19-2002, 11:19 PM   #13
XT6Wagon
Scooby Specialist
 
Member#: 524
Join Date: Nov 1999
Location: WA
Vehicle:
04 STi
White

Default

Jack, it uses the normal EJ mounting pattern. No idea if the Crank has the same bolt pattern on it and the thickness of the bellhousing on the motor side, but its almost certain to be the same as the EJ series, since its FREE to do so, and is cheaper to build a car with such, as it bolts right up to the Auto tranny w/o any new parts needing to be designed and manufactured.
XT6Wagon 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
6spd swap question red06rex Transmission (AT/MT) & Driveline 5 06-02-2010 05:41 PM
h6 swap question dirtyperrinwrx Subaru Conversions 2 10-05-2008 06:15 PM
H6 swap questions bhall Legacy Forum 35 12-09-2005 01:26 PM
H6 Swap Kenny T. Subaru Conversions 22 08-04-2004 04:15 PM
H6 swap in an RS, opinions Stavros g Normally Aspirated Powertrain 16 01-27-2001 01:55 AM


All times are GMT -4. The time now is 11:58 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.