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Old 03-18-2009, 11:41 AM   #1
Scooby Specialist
Member#: 152045
Join Date: Jun 2007
Chapter/Region: SCIC
Location: Corona/Fontana
2003 PIA wrx
wrb..future ppg/fggreen

Default Built Hybrid

Cp's "Hybrid" pistons
Acl race bearings
*Undecided* set of rods

Would a hybrid containing these parts be efficient around 400awhp? Would headwork still be required although the cp pistons bring the compression ratio back down? 8:2:1 ( I think)

How would this compare to a built ej205 with the same? Im reading the hybrid has problems with knock and detonation, can this problem be solved WITHOUT headwork?
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Old 03-18-2009, 07:57 PM   #2
Scooby Specialist
Member#: 118239
Join Date: Jun 2006
Chapter/Region: SCIC
Location: Beijing and Venice Beach
2002 Built Wagon
Wife- 2004 Outback SE


Compression can be raised through top boring or HGaskets. 2.0s are for high revs, 2.5s IMHO are better for all other applications.
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