42 Autosports 2001 2.5RS H6 Swap - EZ30D Inside!

42Autosports · 10-01-2010, 12:48 PM

Ben's car is too nice to leave as a foot note in the thread about Josh's car so we decided to give his car it's own thread.

As our first GC guinea pig he deserves some forum love.

Adam prepped the engine for it new home.

We bolted on some clutch goodies - A Prolite Flywheel and Exedy Stage 1 Clutch.

Slowly...

The H6 looks right at home in the GC engine bay.

It's a tight squeeze, but it fits.

The OBX Header almost fits perfectly. One chop and a weld to Ben's old catback and it will breathe freely.

We'll have to notch that one brace but other wise the OBX Header is a perfect fit.

Stay tuned for future updates as we finish the wiring and get her up and running!

-Miles

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

cruisnhard · 10-01-2010, 06:00 PM

looks awesome.

Patrick Olsen · 10-02-2010, 08:45 AM

Here's the other recent thread about another 42Autosports EZ30 swap. Good stuff! I'm looking forward to more info.

Pat Olsen

Kostamojen · 10-02-2010, 08:05 PM

Why the older EZ30???

42Autosports · 10-03-2010, 12:40 PM

Here's one reason.

Other than that it's also very affordable and unboosted it's dead nuts reliable. We are looking into better internals and the goal is a twin turbo EZ30D for Josh's and/or Steven's car, who knows where we'll go from there.

We have tested an EZ30R on our dyno and we noticed it's torque curve is flatter and it may have more potential in the long run but it's also hard to come by one for a reasonable price. The EZ36D is an engine we'd love to have in one of our Imprezas but right now they are cost prohibitive.

-Miles

Kostamojen · 10-03-2010, 01:36 PM

The D isn't actually as reliable as the R or the 36. I've seen quite a few come in for major work.

Plus they are single port heads, which sucks. I would actually do a EG33 over that motor and get more power with a simpler ECU situation.

But thats just me... Anything is better than the N/A EJ25 for power anyway.

42Autosports · 10-03-2010, 05:42 PM

Quote:

Originally Posted by Kostamojen

The D isn't actually as reliable as the R or the 36. I've seen quite a few come in for major work.

Plus they are single port heads, which sucks. I would actually do a EG33 over that motor and get more power with a simpler ECU situation.

But thats just me... Anything is better than the N/A EJ25 for power anyway.

There are always exceptions to the rule, but with 190K+ now on the motor in Josh's car and running strong, and the fact that I have talked to numerous Subaru techs who have never had the opportunity to tear into one of those motors because they have never seen one broken says a lot about the reliability of the motors.

I think the 'single port heads suck' statement is a little overused. Are they as good as the triple port heads on the R motors? No, but they hardly suck. In fact, unless someone can show me flow-bench results of the heads I am kind of tired of hearing about how bad they suck. Not trying to be a jerk, but people state all the time about how they suck, yet I have never seen direct scientific data to prove what the difference is between the two.

The EG33 is a cool motor no doubt, but our direction is to develop swaps and parts that work well with motors that are cheap now (EZ30D) and will work with motors that become cheap in the future (EZ30R & EZ36R), hence our starting with the EZ30D.

Steven

Kostamojen · 10-03-2010, 10:07 PM

Well, it sucks cause it doesn't sound nearly as good as the tripple port

So far, every single port head Subaru has made has been worse in terms of power capability...

EA63 dual port vs single port: dual port makes more power
EJ22 dual port vs single port: dual port makes more power
EJ25 dual port vs single port (04-05 Legacy PZEV): dual port makes more power
EZ30 triple port vs single port: dual port makes more power

But the big thing IMO is that EZ30 is still more reliable than the turbo motors and more power than the EJ25, and if it really is that cheap then its a good option for sure.

eg33GC · 10-04-2010, 12:05 AM

nice stuff guys. The EZs will catch on like crazy in time, for they are easier to swap and emissions compliant.

42Autosports · 10-04-2010, 07:23 AM

Quote:

Originally Posted by Kostamojen

Well, it sucks cause it doesn't sound nearly as good as the tripple port

I will give you that I do ponder the sound differences - our '07 2.5i with the EZ30D has some low end noises that I don't like, but it sings very nice above 4k rpm. We are taking the car to an exhaust guru later this week to see if he can help us get the sound just right though.

The single port heads on the D are going to make it very easy to strap a turbo on each bank though.

Kostamojen · 10-04-2010, 10:58 PM

Quote:

Originally Posted by 42Autosports

The single port heads on the D are going to make it very easy to strap a turbo on each bank though.

This is true.

6 ports into a turbo is... Difficult.

ScottyB · 10-06-2010, 10:27 PM

great work guys. this is far more interesting to me than a turbo EJ swap. seems like a great mix of affordability and a "fun" level of reliable N/A power with lots of potential down the line if one chooses to turbo. there's just something about a stout, medium displacement 6 cylinder engine that's appealing for street and track use. and the sound...oh that sound.

do you foresee developing a wiring harness to be used with a particular EMS solution? being untalented with anything wiring-related, my dreams of an H-6 swap always hit a wall when i hear about how difficult and expensive it is to modify harnesses AND remain emissions compliant.

keep us updated! i'm in NC as well so i may need to come visit and see it for myself at some point

subaru_driver_1995 · 10-12-2010, 11:10 PM

looks good

42Autosports · 10-22-2010, 05:32 PM

New pics of Ben's car.

The nose returns! It looks like a complete car from the outside again!!

Some of the interior has made it back in the car too.

We're finalizing some of the wiring before we put the front seats back in the car.

Right now she runs and sounds great!

We'll keep you posted as it gets closer to completion.

Miles

subarumafia700 · 10-23-2010, 12:58 PM

Quote:

Originally Posted by Kostamojen

This is true.

6 ports into a turbo is... Difficult.

Thats the nice thing about the 3.3 exhaust manifold. Other then being restrictive, all three ports go into one.

42Autosports · 12-02-2010, 12:39 PM

Kind of a late update but Ben's car is on the road and has been seeing some daily driving duty from him for the past few weeks. I've seen the car around town and other than the exhaust note it's a total sleeper. Pretty soon we'll have GC 3.0RS #2 on the road, see this post for more details.

FuJi K · 12-02-2010, 05:23 PM

the videos!!!!!

Tarek18 · 12-03-2010, 07:19 PM

Looks sweet!

iScoob · 12-04-2010, 12:19 AM

Looks nice, definitely liking the swap

Homemade WRX · 12-04-2010, 03:41 PM

IBthinkingcams

Patrick Olsen · 12-04-2010, 05:37 PM

Quote:

Originally Posted by ScottyB

great work guys. this is far more interesting to me than a turbo EJ swap. seems like a great mix of affordability and a "fun" level of reliable N/A power with lots of potential down the line if one chooses to turbo. there's just something about a stout, medium displacement 6 cylinder engine that's appealing for street and track use. and the sound...oh that sound.

do you foresee developing a wiring harness to be used with a particular EMS solution? being untalented with anything wiring-related, my dreams of an H-6 swap always hit a wall when i hear about how difficult and expensive it is to modify harnesses AND remain emissions compliant.

The first swap they did (the 2007 2.5i that I linked to earlier in this thread) used a Haltech computer. Not sure what they're using in this car, but anders8 installed an '01-04 EZ30D in his rally car and used the stock (EZ30D) ECU. I'm assuming one could maintain emissions compliance doing that, but I don't know. (anders8 was building a rally car, so emissions compliance didn't really matter in his case.)

Quote:

Originally Posted by Homemade WRX

IBthinkingcams

I really would be interested in seeing what one of these engines could do with some cams reground by Delta or whoever. Obviously the single port design isn't going to help the ultimate power potential, but I'm sure there are gains to be had. A 212hp 3.0L isn't exactly a high stress motor, so there's probably some potential waiting to be extracted.

Pat

Homemade WRX · 12-04-2010, 07:04 PM

yeah, acid porting the single ports my be a viable option. Never seen them so I don't know tooling one can get into the ports.

10-01-2010, 12:48 PM	#1
42Autosports NASIOC Vendor Member#: 257297 Join Date: Sep 2010 Location: Concord, NC Vehicle: 2002 H6	42 Autosports 2001 2.5RS H6 Swap - EZ30D Inside! Ben's car is too nice to leave as a foot note in the thread about Josh's car so we decided to give his car it's own thread. As our first GC guinea pig he deserves some forum love. Adam prepped the engine for it new home. We bolted on some clutch goodies - A Prolite Flywheel and Exedy Stage 1 Clutch. Slowly... The H6 looks right at home in the GC engine bay. It's a tight squeeze, but it fits. The OBX Header almost fits perfectly. One chop and a weld to Ben's old catback and it will breathe freely. We'll have to notch that one brace but other wise the OBX Header is a perfect fit. Stay tuned for future updates as we finish the wiring and get her up and running! -Miles * Registered users of the site do not see these ads. Last edited by 42Autosports; 12-02-2010 at 12:36 PM.

10-03-2010, 12:40 PM	#5
42Autosports NASIOC Vendor Member#: 257297 Join Date: Sep 2010 Location: Concord, NC Vehicle: 2002 H6	Here's one reason. Other than that it's also very affordable and unboosted it's dead nuts reliable. We are looking into better internals and the goal is a twin turbo EZ30D for Josh's and/or Steven's car, who knows where we'll go from there. We have tested an EZ30R on our dyno and we noticed it's torque curve is flatter and it may have more potential in the long run but it's also hard to come by one for a reasonable price. The EZ36D is an engine we'd love to have in one of our Imprezas but right now they are cost prohibitive. -Miles Last edited by 42Autosports; 12-02-2010 at 12:36 PM.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
2001 subaru impreza 2.5rs wrx sti pictures inside	tunnerx	SCIC Private Classifieds	4	08-04-2009 02:45 PM
2001 2.5rs ej20k swapped coupe BRP	2.5rsTurbo	Private Vehicle 'For Sale' Classifieds	84	12-18-2007 07:54 PM
WRX Swapped 2001 2.5RS in Atlanta, FORCED SALE	accord94dx	South East Region Private Classifieds	8	06-01-2006 10:57 PM
Fs: Ca - Srp 2001 2.5rs jdm wrx swap. Fmic. Clean Cheap	b20todaej6	Private Vehicle 'For Sale' Classifieds	9	05-15-2006 05:44 PM
WRX motor swap into 2001 2.5RS	RyansJDMgc8	Subaru Conversions	5	05-17-2005 02:18 AM

10-01-2010, 06:00 PM	#2
cruisnhard Scooby Newbie Member#: 254408 Join Date: Aug 2010 Chapter/Region: MWSOC Location: Wisconsin Vehicle: 2008 Impreza WRX Silver	looks awesome.

10-02-2010, 08:45 AM	#3
Patrick Olsen NASIOC Supporter Member#: 120 Join Date: Jul 1999 Chapter/Region: AKIC Location: Where the Navy sends me... Vehicle: 1997 Legacy 2.5GT QuickSilver Metallic	Here's the other recent thread about another 42Autosports EZ30 swap. Good stuff! I'm looking forward to more info. Pat Olsen

10-02-2010, 08:05 PM	#4
Kostamojen Scooby Guru Member#: 2272 Join Date: Sep 2000 Chapter/Region: BAIC Location: haha XD Vehicle: 95 L AWD LIFTED!!! 1970 Subaru FF-1 Coupe	Why the older EZ30???

10-03-2010, 01:36 PM	#6
Kostamojen Scooby Guru Member#: 2272 Join Date: Sep 2000 Chapter/Region: BAIC Location: haha XD Vehicle: 95 L AWD LIFTED!!! 1970 Subaru FF-1 Coupe	The D isn't actually as reliable as the R or the 36. I've seen quite a few come in for major work. Plus they are single port heads, which sucks. I would actually do a EG33 over that motor and get more power with a simpler ECU situation. But thats just me... Anything is better than the N/A EJ25 for power anyway.

10-03-2010, 10:07 PM	#8
Kostamojen Scooby Guru Member#: 2272 Join Date: Sep 2000 Chapter/Region: BAIC Location: haha XD Vehicle: 95 L AWD LIFTED!!! 1970 Subaru FF-1 Coupe	Well, it sucks cause it doesn't sound nearly as good as the tripple port So far, every single port head Subaru has made has been worse in terms of power capability... EA63 dual port vs single port: dual port makes more power EJ22 dual port vs single port: dual port makes more power EJ25 dual port vs single port (04-05 Legacy PZEV): dual port makes more power EZ30 triple port vs single port: dual port makes more power But the big thing IMO is that EZ30 is still more reliable than the turbo motors and more power than the EJ25, and if it really is that cheap then its a good option for sure.

10-04-2010, 12:05 AM	#9
eg33GC Scooby Specialist Member#: 206851 Join Date: Mar 2009 Chapter/Region: MWSOC Vehicle: 99 V4 EJ20K RS	nice stuff guys. The EZs will catch on like crazy in time, for they are easier to swap and emissions compliant.

10-06-2010, 10:27 PM	#12
ScottyB Scooby Newbie Member#: 155883 Join Date: Aug 2007 Location: Durham NC Vehicle: 2005 Impreza 2.5RS bacon rage	great work guys. this is far more interesting to me than a turbo EJ swap. seems like a great mix of affordability and a "fun" level of reliable N/A power with lots of potential down the line if one chooses to turbo. there's just something about a stout, medium displacement 6 cylinder engine that's appealing for street and track use. and the sound...oh that sound. do you foresee developing a wiring harness to be used with a particular EMS solution? being untalented with anything wiring-related, my dreams of an H-6 swap always hit a wall when i hear about how difficult and expensive it is to modify harnesses AND remain emissions compliant. keep us updated! i'm in NC as well so i may need to come visit and see it for myself at some point

10-12-2010, 11:10 PM	#13
subaru_driver_1995 Scooby Newbie Member#: 255139 Join Date: Aug 2010 Chapter/Region: NWIC Location: Monroe WA	looks good

10-22-2010, 05:32 PM	#14
42Autosports NASIOC Vendor Member#: 257297 Join Date: Sep 2010 Location: Concord, NC Vehicle: 2002 H6	New pics of Ben's car. The nose returns! It looks like a complete car from the outside again!! Some of the interior has made it back in the car too. We're finalizing some of the wiring before we put the front seats back in the car. Right now she runs and sounds great! We'll keep you posted as it gets closer to completion. Miles

12-02-2010, 12:39 PM	#16
42Autosports NASIOC Vendor Member#: 257297 Join Date: Sep 2010 Location: Concord, NC Vehicle: 2002 H6	Kind of a late update but Ben's car is on the road and has been seeing some daily driving duty from him for the past few weeks. I've seen the car around town and other than the exhaust note it's a total sleeper. Pretty soon we'll have GC 3.0RS #2 on the road, see this post for more details.

12-02-2010, 05:23 PM	#17
FuJi K Scooby Guru Member#: 3687 Join Date: Jan 2001 Chapter/Region: MWSOC Location: St. Paul, MN Vehicle: MY99 GF4 JDM 6spd NF Performance	the videos!!!!!

12-03-2010, 07:19 PM	#18
Tarek18 Scooby Newbie Member#: 265808 Join Date: Dec 2010	Looks sweet!

12-04-2010, 12:19 AM	#19
iScoob Scooby Newbie Member#: 258537 Join Date: Sep 2010	Looks nice, definitely liking the swap

12-04-2010, 03:41 PM	#20
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!!!	IBthinkingcams

12-04-2010, 07:04 PM	#22
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!!!	yeah, acid porting the single ports my be a viable option. Never seen them so I don't know tooling one can get into the ports.