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Old 10-05-2010, 06:25 PM   #1
bz7202
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Member#: 223761
Join Date: Sep 2009
Location: between baltimore & annapolis
Vehicle:
2002 wrx
silver

Default Hybrid bulid

Currently in the process of building my hybrid motor and want to know if the stock 2.0 tune will work. The car will be my daily driver and i dont want any issues while driving to and form work every day.

Current set up:

-Brand new EJ257
-Stock 2.0 heads (all new parts)
-ARP head studs w/ STI gaskets coated with copper spray
-stock td04 & injectors
-Cold air intake
-Turbo xs BOV
-Aftermarket Catback exhaust (greddy i think)

I will not be running any more boost then factory and will be running pemium fuel.

Any answers or additional ideas will be greatly appricated.
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Old 10-05-2010, 06:27 PM   #2
AWDWRXLOVER
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Chapter/Region: SWIC
Vehicle:
02 built hybrid
sr55/meth/sick speed

Default

No...
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Old 10-06-2010, 10:37 AM   #3
jkopinga
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Location: Taiwan
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WRC Blue

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As above. NO.... You are not taking counter measures against the raised compression. You do not have the heads machined. This would be highly recommended. Perhaps have a look at Equilibrium Tuning's new CNC process for WRX heads. There are also others that do this though.

In a nutshell a 2.5L likes to run richer and more retarded timing than a 2.0L so on both apects it doesn't match with the stock tune you have.

Cheers,

Jasper Kopinga
CS Racing
Taiwan.
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Old 10-06-2010, 02:32 PM   #4
Ryan314
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Location: Maine
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2002 WRX
Hybrid VF22

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You will need at least STI 565cc injectors.
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Old 10-06-2010, 05:46 PM   #5
GrimmSpeed
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SWP

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As long as you stay on the td04 with pump gas you shouldn't need new injectors but you will definitely need a new tune for the 2.5. If you do see your self going to a larger turbo down the line then it might not hurt to do the injectors and a fuel pump now though.

Mike
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Old 10-06-2010, 05:59 PM   #6
bz7202
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silver

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will i need to buy a tuner and have someone tune it or will i be able to have a shop tie into my factory ECU and make the nessary tweeks?
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Old 10-07-2010, 02:05 AM   #7
CamTunedSti
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wont he also need side feed injectors since its the 257 block?
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Old 10-07-2010, 03:37 AM   #8
03BugEyeRex1121
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Molested By Drunkmann

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Quote:
Originally Posted by CamTunedSti View Post
wont he also need side feed injectors since its the 257 block?
No, the injectors he uses are relative to the intake manifold/tgv's he is using. Which is more than likely his stock 2.0l stuff.
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Old 10-07-2010, 09:20 AM   #9
bugeye_fever
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Join Date: Dec 2009
Location: Havelock, NC
Vehicle:
2002 WRX Hybrid Swap
WRB JDM fo sho! 6MT DSS'd

Default No boost

I agree with the above posts, you should definetly not push the motor with the 2.0 map. However, I have a similar setup, 'cept forged pistons, and i'm 3 hours away from my tuner. He suggested that for breaking the motor in I would be ok running an ots cobb stage 2 map, but to stay out of boost. Long story short i drove it 1000 miles with that map out of boost to break in the motor. No problems, again I definetly agree with above posters, and I do not believe it is the best route. But with those stipulations it worked fine for me. Worst part was staying off the gas for 1k mi.

Ray
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Old 10-08-2010, 12:02 PM   #10
slowmike
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You need to find a tuner that you trust and ask him what he recommends. The tune is the most important decision you will make in this process as it will dictate how long this engine will last. As far as the tune is concerned, don't cut any corners and get it done as soon as possible.
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