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Nissan GTS4 IntakeU/G
NISSAN
Skyline HR32
GTS4 AWD
Complete RB20DET INTAKE MANIFOLD Rebuild!
Nissan Skyline GTS4
AWD
Complete RB20 INTAKE MANIFOLD Rebuild!
Index Page - 4 More Pages
Click on the images below to see a larger
view
This is how the intake looked after
fitting the GTR HR33 FMIC - Front Mount
Inter-Cooler to the front of the Skyline.
Obviously the air inlet tract is
traversing the front of the engine over to
the original position of the side mounted
intercooler piping, then progressing along
the original cast pipe with the BYPASS
Valve
(NOT BLOW OFF - ITS AN AUTO!!)
to the
original
throttle body.
This solution is not the optimum because
of HEAT SOAK and the
distance for the air to travel, creating
lag.
Here you can see the original Intake
Manifold has been cut in half to remove the
original throttle body mounting and the
Coolant Bleed Chamber. I mocked up the
intended plenum and the front curved
extension neck to mount the original
throttle body back on to for ease of
construction. I also wanted to reuse the
original TB for continued integration into
the standard Nissan ECU.
So considering that the best idea would be
to shorten the inlet to the end of the
front of the original manifold, I set
about making a mock up of the shape I
considered that would be the best in terms
of flow and capacity for a decent
reservoir of pressurised air ready to be
used on the next intake cycle.
Considering that the RB20 is not exactly a
low RPM torque monster, I had dividers
made up for each intake duct to lengthen
the runners a few inches as the larger
capacity plenum allowed.
Hopefully the
dividers would create a bit more torque down
under 3000RPM where the RB20DET is
definitely lacking before getting into boost
NISSAN
Skyline HR32
GTS4 AWD
