2005 N/A Engines: Are we going to Phase 3 now? (Look at the design!)

Kostamojen · 04-11-2004, 02:41 AM

Holy cow, I didnt realize MAF was coming back! I knew we were getting the JDM style intake manifolds finally, but this looks completely different... Look at the 3" airflow all the way through the intake!

Pics are from a 2005 Forester.

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mycarsux · 04-11-2004, 03:04 AM

does it still make the same amount of power?

Kostamojen · 04-11-2004, 04:24 AM

Little more supposedly. 168?

White 2.5rs · 04-11-2004, 04:54 AM

looks much easier to turbo

YaZahX · 04-11-2004, 12:58 PM

currently i think we have 3 or 4 models on the 2004 series of teh ej25

we have
1. plastic
2. SULEV using a 3 peice intake manifold with MAF
3. aluminum intake with egr
4. and i dont recall if the 04 has it(i know 03 did)
but a standard aluminum without egr

to my understanding they are different ways to try to make te motor more reliable(the s-ulev was just to be a more emissions friendly motor)

either way if it was up to me id just take the NA2.5L blocks that subaru has and burn all of them

its time for somthing new and reliable... either close the decks, make the walls thicker or just stop making the NA version and go back to the 2.2 and get more power out of that

RSpeeder · 04-12-2004, 01:05 AM

yummy, clean engine bay

Penphoe · 04-12-2004, 02:57 AM

I take it it's got individual coils for each spark plug? I don't see a coil pack on the engine.

The intake plumbing looks much more cleaner and direct than before.

LaterZ!
Darren!!

orndog · 04-12-2004, 08:43 AM

Quote:

Originally posted by Penphoe
I take it it's got individual coils for each spark plug? I don't see a coil pack on the engine.

The intake plumbing looks much more cleaner and direct than before.

LaterZ!
Darren!!

Looks like there's a coil pack on the passenger side behind the intake to me.

Hawk296 · 04-12-2004, 10:57 AM

Is it electronic throttle control? Fuel lines are differnt too. Alot has changed. Is the block pretty much the same though?

Compressed · 04-12-2004, 02:56 PM

Quote:

Originally posted by Hawk296
Is it electronic throttle control? Fuel lines are differnt too. Alot has changed. Is the block pretty much the same though?

I think all subaru models except wrx will be electronic throttle control for MY05

xtorted-legacy · 04-12-2004, 03:20 PM

why not make the wrx flybywire also?

hunts · 04-12-2004, 03:44 PM

That looks very similar to the earlier model Foresters from the late 90's. Quite surprised to see the MAF come back on a non-turbo engine. I guess it's less expensive to keep all Subaru engines MAF-based for both turbo and non-turbo?

The other surprising item noticed is that the intake manifold isn't plastic yet. If they are cost-cutting, wouldn't that be the next natural step to take?

HndaTch627 · 04-12-2004, 03:59 PM

stricter emissions control, MAF system's run cleaner then MAP system

8Complex · 04-12-2004, 04:09 PM

I wouldn't call it a phase III motor... that has to do with it's internal design only.

The intake looks like it'd be smoother for turbo'ing, for sure... it's also compatible with our current heads, if you look at where the bolt pattern starts on it.

YaZahX · 04-12-2004, 06:04 PM

Quote:

Originally posted by HndaTch627
stricter emissions control, MAF system's run cleaner then MAP system

it willprobably ha ve both like many of the other cars have

RebelINS · 04-12-2004, 06:15 PM

Are they going to add VVT for USDM NA engines anytime in the future?

-Wes

Kostamojen · 04-12-2004, 08:12 PM

Quote:

Originally posted by RebelINS
Are they going to add VVT for USDM NA engines anytime in the future?

-Wes

Thats anyones guess...

Quote:

Originally posted by hunts
The other surprising item noticed is that the intake manifold isn't plastic yet. If they are cost-cutting, wouldn't that be the next natural step to take?

Well actually the 04 RS intake manifolds are plastic. Thats the only 04 model I think that had the plastic manifold though... The 05 EZ30-R will have a plastic intake manifold, but it looks like the rest of the N/A engines will have this new improved design.

Compressed · 04-13-2004, 12:17 PM

Quote:

Originally posted by xtorted-legacy
why not make the wrx flybywire also?

Not sure, I'd guess that Subaru didn't want to redesign the ecu throttle system on the ej20 system when they have so many other changes going on. I would expect it to occur eventually though.

cvalle-sd · 04-13-2004, 07:16 PM

I missed the whole plastic manifold discussion - is it better or worse than the aluminum?

Jejunum · 04-13-2004, 08:11 PM

Quote:

Originally posted by cvalle-sd
I missed the whole plastic manifold discussion - is it better or worse than the aluminum?

search lots of discussion (i asked questions haha)

basic consensus was overall its better for performance , but people dont always like it better (google gm and plastic manifold)

Kostamojen · 04-13-2004, 10:49 PM

Quote:

Originally posted by cvalle-sd
I missed the whole plastic manifold discussion - is it better or worse than the aluminum?

Well the plastic one was just the same as the old intake mani... The design in this pic is much different, probably has far supperior flow capability.

ttboy19 · 04-13-2004, 11:46 PM

I like the intake manifold. It's not plastic.

Siper2 · 04-14-2004, 09:35 AM

Looks pretty cool to me.

At first glance, the plug wire re-routing threw me for a loop!! Looks much different from my car.

I assume the STi Imprezas will go to this style for '05 too?

-S2-

Siper2 · 04-14-2004, 09:37 AM

Quote:

Originally posted by RSpeeder
yummy, clean engine bay

Heh... Yeah, stock as it may be, I still drool over the pic of my engine bay that I took the day I purchased the car. (Well, actually Fishguy took it...)

*sigh*

04-11-2004, 02:41 AM	#1
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	2005 N/A Engines: Are we going to Phase 3 now? (Look at the design!) Holy cow, I didnt realize MAF was coming back! I knew we were getting the JDM style intake manifolds finally, but this looks completely different... Look at the 3" airflow all the way through the intake! Pics are from a 2005 Forester. * Registered users of the site do not see these ads.

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04-11-2004, 03:04 AM	#2
mycarsux Scooby Specialist Member#: 32049 Join Date: Jan 2003 Chapter/Region: SCIC Location: Fullerton, CA Vehicle: 2002 2.5RS slowbaru +Canon 5D & 30D	does it still make the same amount of power?

04-11-2004, 04:24 AM	#3
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04-11-2004, 04:54 AM	#4
White 2.5rs Scooby Guru Member#: 39936 Join Date: Jul 2003 Vehicle: 99RS TWE&SCAT EJ257 Hydra+HMist+PPG+35R=DEATH	looks much easier to turbo

04-11-2004, 12:58 PM	#5
YaZahX Scooby Specialist Member#: 11932 Join Date: Nov 2001 Chapter/Region: Tri-State Location: NY Vehicle: 1998 CW ITR 2006 NBP SI	currently i think we have 3 or 4 models on the 2004 series of teh ej25 we have 1. plastic 2. SULEV using a 3 peice intake manifold with MAF 3. aluminum intake with egr 4. and i dont recall if the 04 has it(i know 03 did) but a standard aluminum without egr to my understanding they are different ways to try to make te motor more reliable(the s-ulev was just to be a more emissions friendly motor) either way if it was up to me id just take the NA2.5L blocks that subaru has and burn all of them its time for somthing new and reliable... either close the decks, make the walls thicker or just stop making the NA version and go back to the 2.2 and get more power out of that

04-12-2004, 01:05 AM	#6
RSpeeder Scooby Newbie Member#: 37222 Join Date: May 2003 Chapter/Region: MWSOC Vehicle: 2008 335i White	yummy, clean engine bay

04-12-2004, 02:57 AM	#7
Penphoe Friendly Neighbourhood Moderator Member#: 269 Join Date: Sep 1999 Chapter/Region: VIC Location: Burnaby, B.C., Canada Vehicle: 2005 ABP LGT LTD BP6 00 Impreza RS GM6 RIP	I take it it's got individual coils for each spark plug? I don't see a coil pack on the engine. The intake plumbing looks much more cleaner and direct than before. LaterZ! Darren!!

04-12-2004, 10:57 AM	#9
Hawk296 Scooby Specialist Member#: 14555 Join Date: Jan 2002 Chapter/Region: MWSOC Location: Troy, MI Vehicle: 1995 L (Apex Tiger) Battle Ready Baja	Is it electronic throttle control? Fuel lines are differnt too. Alot has changed. Is the block pretty much the same though?

04-12-2004, 03:20 PM	#11
xtorted-legacy Scooby Newbie Member#: 19568 Join Date: Jun 2002 Location: NJ Vehicle: 1995 Impreza L Brilliant Red	why not make the wrx flybywire also?

04-12-2004, 03:44 PM	#12
hunts Scooby Newbie Member#: 32198 Join Date: Jan 2003 Location: Morris County, NJ Vehicle: MY13 Impreza Limited 5-door hatchback	That looks very similar to the earlier model Foresters from the late 90's. Quite surprised to see the MAF come back on a non-turbo engine. I guess it's less expensive to keep all Subaru engines MAF-based for both turbo and non-turbo? The other surprising item noticed is that the intake manifold isn't plastic yet. If they are cost-cutting, wouldn't that be the next natural step to take?

04-12-2004, 03:59 PM	#13
HndaTch627 Scooby Guru Member#: 6551 Join Date: May 2001 Chapter/Region: MWSOC Location: Carol Stream, IL Vehicle: '01 GC8 Dinged STM '09 Concours 14 ABS Black	stricter emissions control, MAF system's run cleaner then MAP system

04-12-2004, 04:09 PM	#14
8Complex Moderator Member#: 922 Join Date: Feb 2000 Chapter/Region: MWSOC Location: Schaumburg, IL Vehicle: 04 FXT Red	I wouldn't call it a phase III motor... that has to do with it's internal design only. The intake looks like it'd be smoother for turbo'ing, for sure... it's also compatible with our current heads, if you look at where the bolt pattern starts on it.

04-12-2004, 06:15 PM	#16
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	Are they going to add VVT for USDM NA engines anytime in the future? -Wes

04-13-2004, 07:16 PM	#19
cvalle-sd Scooby Specialist Member#: 420 Join Date: Oct 1999 Chapter/Region: SCIC Location: The LBC, CA, USA Vehicle: 2001 Cr-V Silver	I missed the whole plastic manifold discussion - is it better or worse than the aluminum?

04-13-2004, 11:46 PM	#22
ttboy19 Scooby Specialist Member#: 38043 Join Date: Jun 2003 Chapter/Region: Tri-State Location: New Jersey Vehicle: 2004 impreza rs4sale '10 Legacy 2.5GT	I like the intake manifold. It's not plastic.

04-14-2004, 09:35 AM	#23
Siper2 Scooby Guru Member#: 1134 Join Date: Mar 2000 Chapter/Region: MAIC Location: Dillsburg, PA Vehicle: 2007 BMW 328xi wagon Silver	Looks pretty cool to me. At first glance, the plug wire re-routing threw me for a loop!! Looks much different from my car. I assume the STi Imprezas will go to this style for '05 too? -S2-