|What is a boost bypass valve?|
valve is integrated in the supercharging system. When low
engine power is required, the bypass allows air to enter the
engine without passing through the supercharger. The
supercharger bypass valve operates in the following manner:
- Under normal engine operating condition vacuum is
supplied to the bypass valve. The valve opens, diverting
excess airflow back into the air plenum. This prevents the
supercharger from “cavitating.”
- Cavitating causes reduced performance,
increased temperature, and poor fuel economy.
- At high engine demands, vacuum is removed from the
bypass valve causing it to close. This directs all airflow
from the supercharger to the intake manifold.
- The supercharger boost (SCB) solenoid is used to control
intake manifold vacuum to the vacuum bypass actuator. The
PCM transmits an output signal to the SCB solenoid, which
activates the solenoid to bypass vacuum when the engine is
under maximum boost, reducing the boost pressure by up to 3
- Supercharger airflow diagram:
|Purpose of a "Boost Bypass Modification"|
purpose of a "Boost Bypass Modification" is to supply
continuous boost from your supercharger when engine is under
maximum boost limits set by the factory. When acceleration
exceeds factory limits (8 psi).
With our boost bypass
modification, you will now be able to keep your boost at the
maximum level when under WOT usage. The term “boost bypass” is
a bit misleading by all those dealers advertising this kit for
a price. Its true name should be, WOT bypass eliminator kit .
. . This modification does not effect normal engine operation
and is designed for modifying boost bypass at WOT only. (WOT=
wide open throttle)
BOOST BYPASS INSTRUCTIONS
|Below are the easy to follow instructions detailing how to
maximize your boost performance on your Ford supercharged
vehicle. Unlike other companies, RPM will provide these
detailed instructions at no cost to you. At RPM Outlet, we do
not charge you for knowledge. |
Step 1. Locate the boost bypass
actuator solenoid and the boost actuator. It’s on the driver’s
side of your supercharger towards the back of the engine.
Step 2. The boost
bypass actuator solenoid has two vacuum lines and a two wire
plug right above the lines. Take the vacuum line connected to
the top of the solenoid and unplug it.