KINSLER TORQUE VALVE -6

Description

The primary purpose for the
Torque Valve is to bypass fuel
and lower the system pressure
when the engine is at Wide
Open Throttle and the engine
RPM is lower than the point
where Peak Torque occurs. When
the RPM is below the peak
torque region, the engines
volumetric efficiency is lower
and the required fuel is
reduced. Excess fuel can cause
a loss in lower RPM torque
output and cause the engine to
falter during hard
acceleration.

The Torque
valve holds a “Jet” in the
shuttle valve, (reverse flow
poppet), which controls the
bypass volume and also the
force exerted by the flow to
move the shuttle and close the
valve. At any constant flow
rate, a change in the jet
diameter will create a change
in the applied force to the
jet and the corresponding
shuttle. Example: Changing to
a smaller diameter jet will
decrease the flow at a given
RPM and increase the pressure
/ force applied to the
shuttle. The shuttle in this
example will now close at a
slightly lower RPM. The
specific change in the
pressure can be calculated by
utilizing the formulas shown
in the “Orifice Theory” on
page 202 of Kinsler
Handbook.

The “Opening”
point, or initial bypass, of
the Torque valve is controlled
by an idle check valve located
at the inlet. The idle check
valve is intended to maintain
the idle fuel pressure of an
existing system so that the
barrel valve will not require
adjustment when the Torque
valve is installed.

The
“Torque Valve” must only have
clean fuel passing through it
and back to the fuel tank. The
valve is plumbed in parallel
to the main bypass and should
not see any back-pressure on
the return flow path back to
the tank. We recommend that
this valve be plumbed via a
separate hose to prevent
changes in the return flow
pressure that might be caused
by any other bypass valves.