Pictured here is the Zex Nitrous Perimeter Plate Nitrous
System minus the bottle and main line. If you are familiar
with plate systems, you'll notice there is not a center
"spray bar" running across the plate with a
Zex system. |
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This close-up of the Zex plate shows a unique assembly
that injects the nitrous and fuel mixture from the "perimeter"of
the plate. See
video for demonstration. |
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The motor compartment before I got started. It's a good
time to clean up existing wiring and plumbing since a
nitrous kit's need for fuel/nitrous solenoids, plumbing,
and associated wiring can make a mess of an already untidy
motor compartment. |
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First, off with carburetor so the perimeter plate could
be installed. |
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The Zex kit includes long carburetor studs if you need
them, in my case I already had longer than normal studs.
Using one of the included carb base gaskets I set the
plate on the manifold. |
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Here I am attaching one of the 12" long -4AN hose
assemblies to the outlet of the nitrous solenoid. |
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Next, I installed the -4AN filter fitting to the inlet
of the nitrous solenoid. |
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The kit includes these easily formed brackets for both
the fuel and the nitrous solenoid. |
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Here I am attaching one of the brackets to the nitrous
solenoid. |
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A rear bolt on the driver's side of the intake manifold
was a good spot to mount the nitrous solenoid. I temporarily
plumbed the solenoid to ensure a clean smooth "turn'
toward the perimeter plate. |
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This Zex chart show the proper jets for the fuel and nitrous
inlets in the perimeter plate. Each jet corresponds to
a horsepower level. |
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The number 46 jet for the nitrous line is good for 100HP. |
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Now it was time to move on to the fuel solenoid. This
solenoid also uses a 12" -4AN hose for the outlet.
However, the kit comes with a brass hose barb fitting
for 3/8" fuel line on the inlet side. |
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Again, using an included bracket I mounted the fuel solenoid.
I mounted this fuel line up front so I could easily create
a "T" from the existing fuel line headed from
the mechanical fuel pump to the carburetor. |
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A 100HP shot requires the number 43 jet on the fuel side
of the perimeter plate, per the Zex instructions. |
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Carefully, I snugged down all the fittings. |
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The system was now ready for the carburetor to be reinstalled. |
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This brass barbed "T" fitting is not included
in the kit, you'll need it if you're running rubber fuel
lines from your fuel pump to your carburetor. |
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In order to verify proper fuel pressure at the fuel solenoid
(Critical!), I used an inline adapter for a 1/8"
NPT fuel pressure gauge. These parts from Mr. Gasket can
be attained at your favorite mail order supplier. |
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I wasn't hip to all the hose clamps, so I would just be
using the fuel pressure gauge to verify 7 psi at the fuel
solenoid. After testing the finished system, I would remove
the gauge and adapter and replace with a single rubber
hose segment from "T" to fuel solenoid. |
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I hopped in the car and fired it up. Obviously, the nitrous
system was not fully operational at this point and the
solenoids were closed. |
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There it is, 7 psi at the fuel solenoid. Zex requires
6 psi of "flowing" (motor running) fuel pressure.
Note, my pump was a factory mechanical. |
