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Old 10-03-2010, 04:50 PM   #1
Scooby Newbie
Member#: 218016
Join Date: Jul 2009
Location: ma.
2002 subaru WRX

Default 02 WRX Wagon HYBRID Build. 2005 Legacy Block+02 2.0 Heads

Car- 2002 Wrx wag 126k on chassis
Engine- 2005 Legacy GT Turbo shortblock, legacy internals, new rings+bearings
2.0 Wrx heads
Stock Turbo
Catless up/dp stock catback
tial 38mm/ e cut out off dp
Goal- Daily RELIABLE driver with nice power (drive 300+ miles a week)
Would like to get tuned by EastCoast Swappers when finished

Headgasket- .050 Metal 3 layer head gasket

I have never built a hybrid or seen a hybrid motor in person but i have lots of expierence with building all types of subarus. Ive searched on NASIOC for a build with a 05 gt 2.5 block but cannot seem to find any. I was just wondering if anyone out there has done this. I dont know what the compression level is going to be. I do not want to build a crazy motor, would like stock wrx turbo to be used.

I have just started reassembling the motor and will be posting pics up every step.

This is my first hybrid build ANY ANY ANY advice insight does/dont positive negative just say it

Thank you

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Old 10-04-2010, 05:43 AM   #2
Sammo Hung
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: S Ga / N Fla


your compression should be around 8.8~8.9:1

if you have built other subaru motors before this should
not be a big deal.
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Old 10-04-2010, 12:49 PM   #3
Scooby Newbie
Member#: 65916
Join Date: Jul 2004
Location: Seattle, WA
1996 Impreza WRX


That turbo will run out of breath quickly on the 2.5. It will be rather torquey down low though.
theonlygreat is offline   Reply With Quote
Old 10-04-2010, 02:45 PM   #4
Scooby Specialist
Member#: 24890
Join Date: Sep 2002
Chapter/Region: SCIC
Location: All I wanted was a Pepsi
2002 Jackwagon


I got the best results by opening up the combustion chambers in the 2.0 heads to match the 99.5mm bore of the 2.5 and using OE head gaskets then took it to the best tuner that I could find.
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Old 10-06-2010, 01:04 PM   #5
Scooby Newbie
Member#: 218016
Join Date: Jul 2009
Location: ma.
2002 subaru WRX


hybrid guys would you suggest using sti turbo?
anyone with numbers or a chart with the stock wrx turbo
thank you
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Old 10-06-2010, 04:08 PM   #6
Scooby Specialist
Member#: 153880
Join Date: Jul 2007
Chapter/Region: RMIC
Location: Western Slope, Colorado
03 Evo VIII
2011 STI


Hybrid or not a TD04 on anything is worthless.

2.5 with TD04 is horribly mismatched. Just a waste of money. I'd get a VF39 or VF34 if you aren't looking to spend much but something bigger would make more sense.
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