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Old 10-09-2013, 02:57 AM   #6 (permalink)
mort
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Quote:
Originally Posted by jeff88 View Post
You say you can't allow air into the reservoir at a higher rate without also increasing the air pressure and I get that, makes sense. If, by not using a throttle, the rate of air in is higher, then by using a bleed off valve, the pressure will be less than what the pressure would be in a throttled engine. Basically, increase speed and decrease pressure, thus equalizing the equation.
Hi Jeff,
I'll take a stab... In this paragraph you suggest to bleed off the extra pressure, well I ask where are you bleeding it to? The pressure in the intake manifold is at best atmospheric. So you'd need to not just bleed it off, but actually suck it out and presumably throw it away, and also throw away the power used to do the sucking.
Throttling wastes power. In another thread I showed the formula to find the throttling power, it's never more than 5% of output power - maybe not really enough to get too worried about.
-mort
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