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**volume**of air, but the pressure relative to absolute (ambient) pressure dictates the volumetric efficiency.

And so I thought on....with our V6 engines, 2 intake valves will always be open on the intake cycle at the same time. Thus the intake charge will always be split almost equally in half. Now if the pressure has already dropped in the manifolds due to obstructions like the air filter, MAF, throttle body, and of course the mythical e-ram

Now the intake valve head has a diameter of 40mm, so unless you go to bigger valves, 40mm diameter is the best possible size to hope for for the intake's diameter. 40mm diameter has an area of (pi(r^2)) which is (3.1416(20^2))=1256.6mm^2. Double this for the 2 valves open at a time which = 2513.27mm^2. So logically, we should have an opening and all openings to the upper manifold with an area of 2513mm^2. Now if we work this backards and divide 2513 by Pi we get ~800 and then take the square root and we get a 28mm radius, or 56mm diameter. Pretty damn close to the stock 55mm design.

Now all this makes me wonder. Why do our stock intakes have what seems to be a big restriction when they are really just the right size? Why does Jason's intakes at 80mm and an area of 5026mm^2 give such big gains, or do we even know how big exactly the gains are? Do his intakes actually increase VE or do they just make the engine work easier?

And it's now that I realize that all this has really been 1 long incoherent rambling on due to the fact that I really just gotta stop drinking soda so damn late. And I guess to answer your question Patrick from quite a while ago:

QUOTE

I guess it's apparent that I really truely do.Do you sit around your bedroom trying to think of the most whacked out way to squeeze 2hp out of your vulcan?[/b]

-mobiuslogic