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Tractorsport Flowbench Forum Archive • View topic - valve hole design

valve hole design

Orifice Style bench discussions

Postby msj442 » Sat Mar 22, 2008 3:16 pm

does it really matter on the size that the air flows in or out on the msd style bench or even bruces design? didnt know if those hole had to be a certain size. got a 5 inch hole saw didnt want to have to buy a 6 inch. i know cheapass.
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Postby bruce » Sat Mar 22, 2008 3:28 pm

Ah which hole? I take it the top one?

5" should be more than large enough. That's what my plans call for . . . you did look at my plans didn't you? ???
"There is no more formidable adversary than one who perceives he has nothing to lose." - Gen. George S. Patton
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Postby Tony » Sat Mar 22, 2008 6:04 pm

Probably a reasonable rule of thumb might be that no internal flow area should be made any smaller than the test hole size, unless you deliberately wish to build in an air restriction for flow measurement, or for flow control.
Also known as the infamous "Warpspeed" on some other Forums.
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Postby msj442 » Mon Mar 24, 2008 2:17 pm

of course bruce lol. they are in my bible. lol
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