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The Terminator
Engine/Tuning
Self ported blower pic's and numbers
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<blockquote data-quote="Iron Fist" data-source="post: 5994979" data-attributes="member: 57015"><p>Thats not a stupid question; they are backflow ports, what happens is that some of the air actually flows back to the incoming air charge. The incoming charge is at atmospheric pressure (14.7psi), a stock Eaton operates at 8psi (atmospheric pressure + 8psi; so infact the manifold pressure is 22.7 psi)</p><p></p><p>The manifold pressure is not really constant though it would appear to be, it actually fluctuates and by reducing the fluctuation via the back flow ports the in coming air charge can be closer to the manifold pressure reducing wear and stress on the rotors and bearings.</p><p></p><p>This is why twins screw designs are far superior and more quiet, the screw compresses the incoming charge to almost match the operating pressure.</p><p></p><p>When the supercharger whines, you are actually hearing the air flow back,</p><p>so if you really want a supercharger to perform the key is to make it quieter.</p></blockquote><p></p>
[QUOTE="Iron Fist, post: 5994979, member: 57015"] Thats not a stupid question; they are backflow ports, what happens is that some of the air actually flows back to the incoming air charge. The incoming charge is at atmospheric pressure (14.7psi), a stock Eaton operates at 8psi (atmospheric pressure + 8psi; so infact the manifold pressure is 22.7 psi) The manifold pressure is not really constant though it would appear to be, it actually fluctuates and by reducing the fluctuation via the back flow ports the in coming air charge can be closer to the manifold pressure reducing wear and stress on the rotors and bearings. This is why twins screw designs are far superior and more quiet, the screw compresses the incoming charge to almost match the operating pressure. When the supercharger whines, you are actually hearing the air flow back, so if you really want a supercharger to perform the key is to make it quieter. [/QUOTE]
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Self ported blower pic's and numbers
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