Lifted from a site but this is how I calculate it>>
Don't forget you need to calculate the volume of the Gasket as well and add that in.
1. Determine the displacement of your engine. Displacement formula is:
BORE X BORE X STROKE X .0031416 = DISPLACEMENT
Example: 92 x 92 x 82 x...
Go Dirgle! ;)
It will hold to the BoV spring pressure, I use lager than stock fittings and hose to the BoV to give it a helping hand when it's coming on boost.
(this lets the + pressure hit faster/harder)
Not uppity at all!
The rubber doodads allow the Covers to move around a bit as they expand/contract with the heat so if you bolt the covers down without them you may end up with more leaks than you're trying to fix!
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