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Old 09-16-2009, 09:44 AM   #2
FuJi K
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul, MN
MY99 GF4 JDM 6spd
NF Performance


You don't have to be afraid of the compression much. The phase1 motors of that year you pulled has a compression ratio of 9.5:1. The EJ22E heads of that motor is 40cc. Your WRX heads being 49cc drops the compression a good bunch. The JDM WRX's run 9.0:1CR.

You would just need a retune because of the higher compression. Run your same timing curve, but maybe lower boost 2-3psi. Only thing I worry about is the engine bearing's condition of that old of a motor. I replaced my 170K mile EJ22T bearings with new ones.
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