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Forced Induction Systems Detailed discussions regarding cold-air intake systens, superchargers, turbo chargers, and other induction systems for your vehicle.

This is a discussion thread titled "5.7L Supercharger bypass defeat", within the Forced Induction Systems forum, part of the Technical & Vehicle Assistance Forums category.


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Old 10-01-2008, 05:35 PM
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Default 5.7L Supercharger bypass defeat

anyone figured out how to defeat the boost bypass valve on the new TRD superchargers for the 5.7L engine? this procedure will enable constant boost from the supercharger in any rpm range rather than wasting it through the bypass loop for fuel economy sake.
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Old 10-01-2008, 05:57 PM
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Default Re: 5.7L Supercharger bypass defeat

From prior experience with a actuator (bypass) valve on the TRD chargers... The bypass valve allows for reduced wear (on the supercharger and the belt) and drag on the motor during normal around town driving. Defeating the bypass can be done usually by simply removing the hose that allows the valve to see vacuum (thus it will see atmospheric pressure always). I do think this is unecessary and will cause reduced life of the internals as well as unecessary reduction in power and throttle response during around town driving due to increased load on the motor and no boost... ALSO, the supercharger will NOT always produce full boost (although it will be at full boost alsmot immediately after 2000 RPM)... removing this valve probably will not improve performance at all.... Just my $0.02

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