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Old 03-17-2009, 11:19 PM   #1
Scooby Newbie
Member#: 175051
Join Date: Mar 2008
Chapter/Region: NESIC
Location: springfield, mass
02 Slow rs

Default wrx hybrid question

i just need some opinions. i just popped the motor in my 04 wrx. im planning on getting a 05 sti shortblock and swapping everything over. my question is, im going to be(for the time being) running the stock wrx ic and td04. its got catless up and 3" catless turbo back. im running a ap v1 stage 2 ots map. will i be ok with the extra displacement with the ots stage 2 map?. i barely have the cash to do the short block so a pro tune is out of the question. any info would be great. thanks!
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Old 03-17-2009, 11:39 PM   #2
Matt Monson
Scooby Guru
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
99 2.5RS, '85 911
'73 914 and 2012 BRZ


Against my advice, a guy local to me here in Colorado did this last year on an engine I put together for him. He drove it for about 4 months with basically the exact same set up you are looking at doing. It survived until he was able to get a pro-tune.

That said, if my tone isn't obvious, I don't think it's a good idea. With how delicate the Ej257 pistons are when exposed to detonation or preignition it's really a crapshoot on whether or not it will hold together. A bad tank of gas or a malfunction with the BCS could crater a piston with no warning at all. You are taking your chances if you do this.
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Old 03-29-2009, 12:54 PM   #3
Scooby Newbie
Member#: 206818
Join Date: Mar 2009
Chapter/Region: NESIC
Location: metheun, ma
2005 sti
wrc blue


i've seen good options as low as $2500 for the sti block
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