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How close is my porting to drag?


SLORYDER

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So let's say I get my porting to 198/ 130 and set up my intakes accordingly...

 

I would keep those numbers at 198* and 128* for peak power.

 

Theoredically, assuming I get the right pipes for the rpm of my durations, I will be getting pretty much peak hp out of my engine; limited by transfer angles and rate of flow, right?

 

Angles I won't even attempt to correct...But what about opening up the transfers... How much are these normally hogged out for a full drag port? What is there....10 or more hp to be gained by hogging these out AFTER getting your durations right...Or would it be worth it just to get your durations correctly matched to your pipes (cpi or shearer of course)?

 

I would stagger the transfers I.E. Mains open, 0.5mm later Aux open, 0.5mm later boost ports open to produce more mid-range.

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