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Old 05-05-2010, 09:49 PM   #1
imc343
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Member#: 237554
Join Date: Feb 2010
Default ej257 hybrid build

i have a 96 impreza coupe and live in mass so i have to pass emmisions.

my plan is to do a hybrid build starting with a ej257 shortblock new from subaru(should be picking up soon) and eventualy buying new heads ecu and harness

basicly what i want to kno is if i want to run avcs and pass emmision do i have to use the udsm 2.5 heads and ecu and just say screw the whole hybrid idea or could i use jdm 207 heads and run a usdm sti ecu to control the avcs?

if i use 2.0 heads i plan on getting the combustion chamber machined to get the CR back to normal instead of running a thicker head gasket . i would just like to run the avcs without dropping bank on usdm heads.
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Old 05-06-2010, 01:03 PM   #2
imc343
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Member#: 237554
Join Date: Feb 2010
Default

are usdm and jdm 2.0 heads the same besides the avcs? and is going for the avcs even worth it in the end if im doing a hybrid swap? should i just go with factory us wrx heads with upgraded internals and save myself the trouble
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Old 05-06-2010, 01:35 PM   #3
AWDWRXLOVER
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02 built hybrid
sr55/meth/sick speed

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save yourself alot of work and headaches and do a full 2.5 conversion.
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Old 05-06-2010, 01:58 PM   #4
jdmboy
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Chapter/Region: MAIC
Location: MD
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2002 wrx wagon R.I.P
87 bmw e30

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Quote:
Originally Posted by AWDWRXLOVER View Post
save yourself alot of work and headaches and do a full 2.5 conversion.
^^^this if you really want avcs just do a full conversion
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