ej25t

98skuby · 04-02-2006, 08:13 PM

has anyone done the gc8 2.5rs engine mix. putting the sti short block and stock rs heads together? and turbo charged it? i have questions of matching the parts.
james

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cyrus923 · 04-02-2006, 08:22 PM

A lot of people think that non-turbo heads are actually work better then turbo heads. I think they will be fine if you change the valve springs...ect. Maybe someone can give more info as to why they are better.

JonofScio · 04-02-2006, 09:05 PM

the block mates up the same and will work fine. but you might want to invest in pistons with a dish designed for that head. they also have a rod/piston combo at crawford that would swap into your stock EJ25 n/a block. but you wouldn't really be able to get the same performance capability as the EJ257 block as yours is not semi closed deck... BUT, it is an option.

lasek87 · 04-02-2006, 11:16 PM

I have a 99 2.5rs with a FAT stage 1 kit on it. In a month im getting a sti short block installed along with a new ECU. The guys at xcceleration.com told after the block and the ECU ill be able to get around 350 hp at 15-18psi. Ill let you know what happens. Ill post some pics to!! Good luck though

Matt Monson · 04-03-2006, 10:53 AM

It's never been done, ever.

Just giving you a hard time. There's a bunch of threads in the proper forum (aftermarket forced induction) about this seet up. It's not a swap, it's an RS-T. Drop a PM to skully. He's in your neck of the woods, and can steer you towards the right people to help you out with this and get it tuned properly...

04-02-2006, 08:13 PM	#1
98skuby Scooby Newbie Member#: 52632 Join Date: Jan 2004 Chapter/Region: South East Location: Douglasville, GA Vehicle: 1998 impreza rs black	ej25t has anyone done the gc8 2.5rs engine mix. putting the sti short block and stock rs heads together? and turbo charged it? i have questions of matching the parts. james * Registered users of the site do not see these ads.

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04-02-2006, 08:22 PM	#2
cyrus923 Scooby Newbie Member#: 44425 Join Date: Sep 2003 Chapter/Region: South East Location: Knoxville TN Vehicle: 2004 Impreza WRX WR BLUE	A lot of people think that non-turbo heads are actually work better then turbo heads. I think they will be fine if you change the valve springs...ect. Maybe someone can give more info as to why they are better.

04-02-2006, 09:05 PM	#3
JonofScio Scooby Newbie Member#: 53595 Join Date: Jan 2004 Chapter/Region: NWIC Location: nowehres Vehicle: 1987 GL Hatch EA81 1.6L + Weber	the block mates up the same and will work fine. but you might want to invest in pistons with a dish designed for that head. they also have a rod/piston combo at crawford that would swap into your stock EJ25 n/a block. but you wouldn't really be able to get the same performance capability as the EJ257 block as yours is not semi closed deck... BUT, it is an option.

04-02-2006, 11:16 PM	#4
lasek87 Scooby Newbie Member#: 98262 Join Date: Oct 2005 Location: Weed, CA Vehicle: 1999 impreza 2.5rs white	I have a 99 2.5rs with a FAT stage 1 kit on it. In a month im getting a sti short block installed along with a new ECU. The guys at xcceleration.com told after the block and the ECU ill be able to get around 350 hp at 15-18psi. Ill let you know what happens. Ill post some pics to!! Good luck though

04-03-2006, 10:53 AM	#5
Matt Monson Scooby Guru Member#: 832 Join Date: Jan 2000 Chapter/Region: RMIC Location: Teh Ghetto Garage, CO Vehicle: 99 2.5RS, '85 911 '73 914 and 2012 BRZ	It's never been done, ever. Just giving you a hard time. There's a bunch of threads in the proper forum (aftermarket forced induction) about this seet up. It's not a swap, it's an RS-T. Drop a PM to skully. He's in your neck of the woods, and can steer you towards the right people to help you out with this and get it tuned properly...