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Originally Posted by Nick Koske  Right...but I don't think that will account for a 70% increase in the amount of air allowed through the restrictor to remove the pressure differential. If the engine has the capacity to 18900 lpm, then the air box needs to have 18900 lpm introduced to it...otherwise there is a vacuum in the air box. It doesn't seem possible to introduce 18900 lpm into the air box through the given restrictors and normal speeds. Sure there's a ton more variables that need to be taken into account to get an exact number, but generally if you're 70% off there's no way to massage the numbers to make it work. |
And just how much lift and duration is there in the cam and what type of cam to crank timing is there ie how much of the total volume is actually being utilized and therefore needs to be filled ie volumetric efficency? It is not as straight forward as you are making it out to be and there are many factors that NEED to be included! I will grant that somewhere in the intake there has to be a vacuum state in order to charge the cylinders (naturally aspirated), but where that occurs is the question. And whether or not the crack was sufficiently large enough to leak under any conditions other than under total blockage of the restrictor throat!