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Old 10-10-2012, 01:32 PM   #5
Scooby Guru
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
1995 WRX
2015 F150


19 is risky with the stock maf. It will be just about maxed out at 18. If you do esl or pfc and go map or use a different maf it's ok. You can't run that much boost on 440 injectors anyway, you'd need 550.

18 psi is almost 300 whp and you really don't want much more than that on the stock engine anyway or you risk breaking parts.
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