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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Quote:
Originally Posted by 911st View Post
We can do this by engineering how the Metering plate and cone works
OK, one more comment before I stop and just listed for awhile.
The stalling MP, when it's near the bottom of it's range, probably has to do with increased air velocities flowing over the edges of the plate....because the "cone" gets progressively wider, opening up more air space between it and the plate. Thus, greater air velocity across the top of the plate creates a low pressure zone above the plate and higher pressures below...causing lift and "stall". It's basic aerodynamics, such as the curvature of a wing and the pressure differential top-to-bottom that causes lift.

So, attaching some sort of "airfoil" on top of the MP may not have much value unless it were able to follow the tapered contour of the cone as the MP moves downward. It may be worth a try, but we need an engineer type dude to do the math. The bottom line: It sounds like changing the pin location (and thus the fulcrum point of the arm) is probably the better option. But then that arm will move easier, and you would have to retune all control pressures accordingly.

For what it's worth....I've got to visualize the physics of how things work, before I can strategize how to modify.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 03-06-2009, 12:47 PM
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