Blake Machine Company
Specializing in Datsun Z Car Performance

 

Typical Intake Flow for Ported P90 Head

 

  • The Stage 2 porting flows 17% better than stock at 0.55" lift. 
    This translates to a potential 17% more power on a stock L28 @ 160HP
    Coupling the ported head with the correct cam and pistons will yield over 200HP

  • Blake Machine Company uses a SuperFlow Bench to verify all port work


Typical Exhaust Flow for Ported P90 Head

 

  • The ratio of exhaust flow to intake flow is only 56% for a stock P90 head
    The ratio for our Stage 1 & 2 porting is 70% to 90% (where rule of thumb optimization puts it)

 

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