Originally posted by Bob H:
Originally posted by RedSVT:
[b][QUOTE]Bob your theory as to the function of bypass[blow off] valves on roots superchargers is incorrect.
"The best kept secret in forced induction is the little known bypass valve. This small valve, when properly installed between the supercharger and the air throttle body, allows the supercharger to become extremely efficient in terms of economy and parasitic power loss. Our M90 supercharger uses less than 1/3 of 1 HP at 60 MPH cruising. The bypass is operated by a vacuum actuator control unit that is normally closed. When vacuum is high (idle-cruising) the actuator opens the bypass valve, equalizing the vacuum pressure throughout the system. When boost is required (accelerating) the vacuum is decreased and the bypass valve instantly closes, causing pressure to increase into the cylinders. This equalized vacuum condition virtually eliminates the normal parasitic power loss of a forced induction system."
http://www.magnuson-products.com/bypass_valve.htm
Bob[/b]I'm sorry Bob but you misunderstand the info! I have worked with Dave Magnuson myself a few times on different projects, in fact I own,use and install several of his products. The description of operation you posted is exactaly the same way a blow off or by pass valve works on a turbo system. If you dont believe me call them up your self and see!
Oh I almost forgot. Magnuson is the ONLY FACTORY EATON supercharger servicing facility in the US. Take a look at the blowers that B&M sell, they are Daves own design. He used to build them and sell them. He then sold the company and began his new buisness with EATON.
