2005 sti engine in 2003 wrx

youngW03 · 03-19-2009, 12:51 AM

would there be any way i can keep my 5 speed transmission and just swap out the engine with a 2005 sti engine, and get a new ecu or would i reflash my ecu. can any one take me through the steps or point me towards a thread that could tell me how to swap.

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hybrid gti 2 · 03-19-2009, 01:05 AM

Yes. How, sorry I have no idea. I just know it's common to keep the 5mt. It's just a few wires. Surprised there is no post about this or sticky.

youngW03 · 03-19-2009, 01:11 AM

Quote:

Originally Posted by hybrid gti 2

Yes. How, sorry I have no idea. I just know it's common to keep the 5mt. It's just a few wires. Surprised there is no post about this or sticky.

dude i know i was totally wondering why there wasnt myself and ive heard of people doing it, and i want to do it i love my bug eye but i want more power haha

Daggah · 03-19-2009, 01:37 AM

Swap the transmission and keep your engine instead...you can easily reach/exceed STi power levels with the '02-'05 2.0L block.

Luizwrx · 03-19-2009, 01:39 AM

I'm interested in the answer as well.

youngW03 · 03-19-2009, 01:47 AM

swap the tranny huh, would you recommend like a tranny rebuild with ppg gears or sti gearing or what?

suub07 · 03-19-2009, 02:51 AM

just swap for the stock 6sp sti transmission... it can handle an obscene input. swap the trans, build the engine.

running a 5sp will hold up with turned up boost and higher input, but for how long... most likely (unless you never launch/drive hard on it) you will need trans work anyways.

tranny FTW!

http://forums.nasioc.com/forums/show....php?t=1717700

I assume some have seen this thread, this guy claims to be rolling with the stock trans.

grippy monkey · 03-19-2009, 03:23 AM

swapping the tranny and building the motor would be the way to go!

|Disso| · 03-19-2009, 07:56 AM

Yup. You were looking at it all wrong. Swap the TRANNY from the STI NOT the motor. You could easily bolt on a vf39, get an exhaust and tune, and be quicker than any stock STI for a bout a grand.

emsmap · 03-19-2009, 08:27 AM

If you want to build your 5 speed box, these are the gears I got Andrewtech to build me

http://www.youtube.com/watch?v=_wZCTs4gZAI

http://www.youtube.com/watch?v=Ej0MgikZA9I

http://www.youtube.com/watch?v=m01ZEhBz0HU

http://www.youtube.com/watch?v=Kgmkzl5QCjY

http://www.youtube.com/watch?v=mCwp6bCfyyU

hybrid gti 2 · 03-19-2009, 09:34 AM

^ videos makes me sleepy

ppg can do a lot more. I have 70k miles on my ppg. I have been known to get smoke off my tires.

Yet these guys are right. Unless you built the box 6mt would be a good choice.

emsmap · 03-19-2009, 09:51 AM

Quote:

Originally Posted by hybrid gti 2

^ videos makes me sleepy

ppg can do a lot more. I have 70k miles on my ppg. I have been known to get smoke off my tires.

Yet these guys are right. Unless you built the box 6mt would be a good choice.

Thats when I first got them (still in breakin period) I have abused them quite a bit since then

hybrid gti 2 · 03-19-2009, 10:27 AM

thats more like it!

Vlad · 03-19-2009, 10:42 AM

I am interested in the original question. Many people know everything about transmission swaps. It's well documented. Everybody knows the advantages, etc.

But, back to the initial question: What if?
What if you don't have the money to do the right thing just yet (getting the 6 speed) and you get caught with the 5 speed at high mileage, say 160 k miles and your 2.0 dies, of spun bearing, by example..

You decide to immediately do a 2.5 and postpone the transmission, although WE ALL KNOW that's what you should do (transmission first).
This probably happens in real life. Each time you have some $, you go for more power. Untill, one day it's too late for your 2.0, BEFORE you had a chance to do a 6speed.

And here's my question:
How do you go about driving the AVCS in the 2.5? A reflash of the 2.0 ECU? I don't think so.
Without the AVCS, your 2.5 is more like a 2.3 (I'm just kidding, what I mean is that you're starting with less than 100% of what the Sti offers stock)
There's the throttle by wire, which requires a pedal, and probably running a wire to the engine compartment, etc.
OR you may run the 2.5 on cable throttle, I wonder if anyone did that, by using your old TB.
So, please, answer the original question.

suberdave · 03-19-2009, 08:49 PM

read this.

http://elementtuning.com/technical/ej25_install.htm

i think this is what you are after... this is for the STI longblock not just the short block...

-=Suberdave=-

03-19-2009, 12:51 AM	#1
youngW03 Scooby Newbie Member#: 186033 Join Date: Aug 2008 Chapter/Region: SWIC Location: Albuquerque New Mexico Vehicle: 2003 gtx30r hyb wagn PSM	2005 sti engine in 2003 wrx would there be any way i can keep my 5 speed transmission and just swap out the engine with a 2005 sti engine, and get a new ecu or would i reflash my ecu. can any one take me through the steps or point me towards a thread that could tell me how to swap. * Registered users of the site do not see these ads.

03-19-2009, 10:42 AM	#14
Vlad Scooby Specialist Member#: 46135 Join Date: Oct 2003 Chapter/Region: Tri-State Location: NY Vehicle: 02 WRX Powered by Sti V9 Spec C	I am interested in the original question. Many people know everything about transmission swaps. It's well documented. Everybody knows the advantages, etc. But, back to the initial question: What if? What if you don't have the money to do the right thing just yet (getting the 6 speed) and you get caught with the 5 speed at high mileage, say 160 k miles and your 2.0 dies, of spun bearing, by example.. You decide to immediately do a 2.5 and postpone the transmission, although WE ALL KNOW that's what you should do (transmission first). This probably happens in real life. Each time you have some $, you go for more power. Untill, one day it's too late for your 2.0, BEFORE you had a chance to do a 6speed. And here's my question: How do you go about driving the AVCS in the 2.5? A reflash of the 2.0 ECU? I don't think so. Without the AVCS, your 2.5 is more like a 2.3 (I'm just kidding, what I mean is that you're starting with less than 100% of what the Sti offers stock) There's the throttle by wire, which requires a pedal, and probably running a wire to the engine compartment, etc. OR you may run the 2.5 on cable throttle, I wonder if anyone did that, by using your old TB. So, please, answer the original question. Last edited by Vlad; 03-19-2009 at 10:54 AM.

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03-19-2009, 01:05 AM	#2
hybrid gti 2 Scooby Guru Member#: 67004 Join Date: Jul 2004 Chapter/Region: SCIC Location: (818) 200k+ ej205 ppg 5mt Vehicle: 02 vf30 pnp wagon silver and cf	Yes. How, sorry I have no idea. I just know it's common to keep the 5mt. It's just a few wires. Surprised there is no post about this or sticky.

03-19-2009, 01:37 AM	#4
Daggah Scooby Newbie Member#: 152077 Join Date: Jun 2007 Chapter/Region: International Location: Yokota AB, Japan	Swap the transmission and keep your engine instead...you can easily reach/exceed STi power levels with the '02-'05 2.0L block.

03-19-2009, 01:39 AM	#5
Luizwrx Scooby Newbie Member#: 188577 Join Date: Sep 2008 Chapter/Region: TXIC Location: Conroe, Texas Vehicle: 2003 EJ207 PSM	I'm interested in the answer as well.

03-19-2009, 01:47 AM	#6
youngW03 Scooby Newbie Member#: 186033 Join Date: Aug 2008 Chapter/Region: SWIC Location: Albuquerque New Mexico Vehicle: 2003 gtx30r hyb wagn PSM	swap the tranny huh, would you recommend like a tranny rebuild with ppg gears or sti gearing or what?

03-19-2009, 02:51 AM	#7
suub07 Scooby Newbie Member#: 163702 Join Date: Nov 2007 Chapter/Region: TXIC Location: Odessa TX Vehicle: 2007 impreza 2.5 UGM	just swap for the stock 6sp sti transmission... it can handle an obscene input. swap the trans, build the engine. running a 5sp will hold up with turned up boost and higher input, but for how long... most likely (unless you never launch/drive hard on it) you will need trans work anyways. tranny FTW! http://forums.nasioc.com/forums/show....php?t=1717700 I assume some have seen this thread, this guy claims to be rolling with the stock trans.

03-19-2009, 03:23 AM	#8
grippy monkey Scooby Guru Member#: 131067 Join Date: Nov 2006 Chapter/Region: SCIC Location: Inglewood! Vehicle: your "stance" sucks	swapping the tranny and building the motor would be the way to go!

03-19-2009, 07:56 AM	#9
\|Disso\| Scooby Guru Member#: 155515 Join Date: Aug 2007 Chapter/Region: SCIC Location: 626 Vehicle: OBP pignose hai2u	Yup. You were looking at it all wrong. Swap the TRANNY from the STI NOT the motor. You could easily bolt on a vf39, get an exhaust and tune, and be quicker than any stock STI for a bout a grand.

03-19-2009, 08:27 AM	#10
emsmap Scooby Guru Member#: 159334 Join Date: Sep 2007 Chapter/Region: MAIC Location: Martinsburg, WV Vehicle: 02 PSM WRX UTEC,PPG,FMIC, Big turbo	If you want to build your 5 speed box, these are the gears I got Andrewtech to build me http://www.youtube.com/watch?v=_wZCTs4gZAI http://www.youtube.com/watch?v=Ej0MgikZA9I http://www.youtube.com/watch?v=m01ZEhBz0HU http://www.youtube.com/watch?v=Kgmkzl5QCjY http://www.youtube.com/watch?v=mCwp6bCfyyU

03-19-2009, 09:34 AM	#11
hybrid gti 2 Scooby Guru Member#: 67004 Join Date: Jul 2004 Chapter/Region: SCIC Location: (818) 200k+ ej205 ppg 5mt Vehicle: 02 vf30 pnp wagon silver and cf	^ videos makes me sleepy ppg can do a lot more. I have 70k miles on my ppg. I have been known to get smoke off my tires. Yet these guys are right. Unless you built the box 6mt would be a good choice.

03-19-2009, 10:27 AM	#13
hybrid gti 2 Scooby Guru Member#: 67004 Join Date: Jul 2004 Chapter/Region: SCIC Location: (818) 200k+ ej205 ppg 5mt Vehicle: 02 vf30 pnp wagon silver and cf	thats more like it!

03-19-2009, 08:49 PM	#15
suberdave NASIOC Supporter Member#: 101865 Join Date: Nov 2005 Chapter/Region: NWIC Location: Covington, WA Vehicle: 88 GL-10 STi silver	read this. http://elementtuning.com/technical/ej25_install.htm i think this is what you are after... this is for the STI longblock not just the short block... -=Suberdave=-