Block Swap - Subaru WRX Forum
 
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#1 Old 09-18-2006, 10:54 PM
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Block Swap

Can I put just the EJ257 block with crank, pistons, and rods, onto my current 03 wrx. Will everything bolt right up or do I need anything else? If so what else do I need to do? Also will it affect the transmission?
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#2 Old 06-24-2007, 12:31 AM
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Thats exactly what I want to know
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#3 Old 11-15-2007, 12:17 PM
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me too!!
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#4 Old 04-18-2008, 11:38 AM
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me as well
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#5 Old 04-18-2008, 12:00 PM
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yes everything is a direct fit. You will need tuning for it and might need a thicker head gasket unless you want to run a octane booster like Torco(no 93 where I live). Bigger than stock turbo would be advisable as well. Transmission will last as long as you dont beat on it like any other mod. I have been running my hybrid for almost a year on the stock tranny.

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#6 Old 04-18-2008, 12:31 PM
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I love how threads just "continue" even though they were started a year and a half ago.

And +1 to what Jave said.

Mike
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#7 Old 04-18-2008, 01:08 PM
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lol wow I just saw that...

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#8 Old 04-18-2008, 01:29 PM
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well, darthsofearu wanted to know and he at least did some searching. Got no problem with dragging up old threads if there's a good reason.

TY for info Jave. darthsofearu, the key is using the WRX heads and creating a "hybrid" rather than swapping the whole motor in there. That way you still keep the stock ECU etc and it's easy to just re-tune like you would for most other power mods.

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#9 Old 04-18-2008, 06:48 PM
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Dang Jave, you have been running that setup that long now? I remember when you started it.

Joshua
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#10 Old 04-19-2008, 07:41 PM
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wow. oh well. yea, i am keeping the heads and just swapping the shortblock. but what will i need to do with the ecu. will my wrx cobb ap v1 work? thanx guys
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#11 Old 04-19-2008, 08:46 PM
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it will work if you go to a cobb tuner, i dont think they have an OTS map for a hybrid.

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#12 Old 04-19-2008, 10:29 PM
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Quote:
Originally Posted by nagyhead View Post
i dont think they have an OTS map for a hybrid.
nah definitely not, he'll need a custom map for sure

Mike
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