ej257 shortblock swap question...

W R u b i X · 09-05-2007, 02:21 AM

ok so i have to ahve my shortblock replaced... and i can get the 2.5 sti block for the same price as the stock 2.0 block...

my question is... will i have to be re-tuned if i go with the 2.5 liter?

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Spec V to Wagon · 09-05-2007, 08:14 AM

I would say def.

What else needs to be swapped with going from a 2.0 bottom end to a 2.5 as I am in the same boat as you.

2.0 heads can be used.
What about ecu or other sensors or anything?

vinceGC8 · 09-05-2007, 01:01 PM

http://forums.nasioc.com/forums/show....php?t=1085359

http://forums.nasioc.com/forums/show...hortblock+swap

MindzeyeWRX02 · 09-05-2007, 03:38 PM

Quote:

Originally Posted by W R u b i X

ok so i have to ahve my shortblock replaced... and i can get the 2.5 sti block for the same price as the stock 2.0 block...

my question is... will i have to be re-tuned if i go with the 2.5 liter?

Yes, you will need to get a custom tune since your ECU is designed for the 2.0L. I suggest going with the STi Head Gaskets and deal with the high compression ratio through tuning.

I would also suggest upgrading to a higher cam duration as the stock WRX cams greatly effect the top end.

jaxscuby · 09-05-2007, 08:25 PM

tune a 2.5 with 2.0 heads with tmic to 333 whp & 342 ftlbs ~21 psi
re tune after fmic & aquamist 2d and got 383 whp & 398 ftlbs ~21 psi
02 wrx with utec.

W R u b i X · 09-06-2007, 02:06 AM

meh im just gonna replace my 2.0 with a 2.0... i know its boring but... its what i can afford...

Wrinkleboi · 09-06-2007, 03:01 AM

seriously while you have the chance go with the 2.5!! totally different animal... it will transform your car. if all the other costs are the same (block, gaskets, etc) then its a no brainer. your only extra expense is a retune... thats a bargain and a half

Spec V to Wagon · 09-06-2007, 08:38 AM

Quote:

Originally Posted by W R u b i X

meh im just gonna replace my 2.0 with a 2.0... i know its boring but... its what i can afford...

For honestly a few dollars more you can have one hell of a vehicle. I'm in the same boat as you. I'm def going for a 2.5 block

W R u b i X · 09-06-2007, 01:10 PM

well i found a 2.0 block for 1k cheaper thjan the shop wants to sell me the 2.5... so to me a poor college student... its a no brainer...

Spec V to Wagon · 09-07-2007, 12:59 AM

Quote:

Originally Posted by W R u b i X

well i found a 2.0 block for 1k cheaper thjan the shop wants to sell me the 2.5... so to me a poor college student... its a no brainer...

Um 2.0 block $1700
2.5 blcok $1800

W R u b i X · 09-07-2007, 02:40 PM

well i got a 2.0 for 700...

09-05-2007, 02:21 AM	#1
W R u b i X Scooby Newbie Member#: 112522 Join Date: Apr 2006 Chapter/Region: SCIC Location: oRANGE cOUNTY Vehicle: 2007 STi Limited UGM	ej257 shortblock swap question... ok so i have to ahve my shortblock replaced... and i can get the 2.5 sti block for the same price as the stock 2.0 block... my question is... will i have to be re-tuned if i go with the 2.5 liter? * Registered users of the site do not see these ads.

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09-05-2007, 08:14 AM	#2
Spec V to Wagon Scooby Newbie Member#: 129715 Join Date: Oct 2006 Chapter/Region: MAIC Location: Philadelphia Vehicle: 03 Wagon Silver	I would say def. What else needs to be swapped with going from a 2.0 bottom end to a 2.5 as I am in the same boat as you. 2.0 heads can be used. What about ecu or other sensors or anything?

09-05-2007, 01:01 PM	#3
vinceGC8 Scooby Specialist Member#: 72263 Join Date: Oct 2004 Chapter/Region: SCIC Location: Los Angeles Vehicle: 2008 Impreza STi Dark Grey Metallic	http://forums.nasioc.com/forums/show....php?t=1085359 http://forums.nasioc.com/forums/show...hortblock+swap

09-05-2007, 08:25 PM	#5
jaxscuby n00b Moderator Moderator Member#: 10613 Join Date: Sep 2001 Chapter/Region: South East Location: F L O R I D A Vehicle: 2002 USDM WRX WRB	tune a 2.5 with 2.0 heads with tmic to 333 whp & 342 ftlbs ~21 psi re tune after fmic & aquamist 2d and got 383 whp & 398 ftlbs ~21 psi 02 wrx with utec.

09-06-2007, 02:06 AM	#6
W R u b i X Scooby Newbie Member#: 112522 Join Date: Apr 2006 Chapter/Region: SCIC Location: oRANGE cOUNTY Vehicle: 2007 STi Limited UGM	meh im just gonna replace my 2.0 with a 2.0... i know its boring but... its what i can afford...

09-06-2007, 03:01 AM	#7
Wrinkleboi Top Scoob 006 Member#: 14424 Join Date: Jan 2002 Chapter/Region: South East Location: Stuart, FL Vehicle: BugI w/ 07 STi Swap www.TriStateTuners.com	seriously while you have the chance go with the 2.5!! totally different animal... it will transform your car. if all the other costs are the same (block, gaskets, etc) then its a no brainer. your only extra expense is a retune... thats a bargain and a half

09-06-2007, 01:10 PM	#9
W R u b i X Scooby Newbie Member#: 112522 Join Date: Apr 2006 Chapter/Region: SCIC Location: oRANGE cOUNTY Vehicle: 2007 STi Limited UGM	well i found a 2.0 block for 1k cheaper thjan the shop wants to sell me the 2.5... so to me a poor college student... its a no brainer...

09-07-2007, 02:40 PM	#11
W R u b i X Scooby Newbie Member#: 112522 Join Date: Apr 2006 Chapter/Region: SCIC Location: oRANGE cOUNTY Vehicle: 2007 STi Limited UGM	well i got a 2.0 for 700...