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There is a recirculating valve on all positive displacement blowers... You can see the Kenne Bell's on the right hand side rear of this picture:
Without that valve the blower would literally bend the throttle plate when you came off the gas...
Not to drag this thread off topic... The recirc valve reduces parasitic loading when cruising around town and to some extent reduces blower discharge temperatures.
As far as bending throttle blade... that's a little far fetched. Have you seen a 6-71, 8-71... blower bend a carb throttle blade? Your max pressure differential is 14.x psi.
From: Greater Detroit Metro MI, when I'm not travelling.
Originally Posted by Skunkworks
Not to drag this thread off topic... The recirc valve reduces parasitic loading when cruising around town and to some extent reduces blower discharge temperatures.
As far as bending throttle blade... that's a little far fetched. Have you seen a 6-71, 8-71... blower bend a carb throttle blade? Your max pressure differential is 14.x psi.
LG, nice product .
Mike
No its not... The blower is a positive displacement pump; it will FORCE X amount of air per revolution; if the throttle plate closes that air will have nowhere to go and something will give; either the blower will push itself off the intake manifold or the throttle blade will bend. Maximum pressure differentials for twin screw superchargers is a lot more than just 1 atmosphere
From: Greater Detroit Metro MI, when I'm not travelling.
Originally Posted by Z06wanted
Here is a pic of my Kene Bell setup. Do you think it could work and how would I do it?
You would put a boost control solenoid in the vacuum line running from your intake manifold to the recirculation valve actuator (that black disc shaped thing). By actuating the boost control solenoid via an electronic boost controller you could "simmer" that recirc valve between open and closed and dial in different boost settings.
In practice I think that valve may be very slow and the boost control would be poor. But I think you could at least dial in close to 0 boost in 1st gear to aid launching