ZEX controller...how it actually works
#1
ZEX controller...how it actually works
Here is a question I have had for a while...The zex controller is dubbed one of the smartest, advanced...blah blah. Stated to be able to control fuel pressure based on nitrous pressure. I have tried finding how it actually works on the zex site and many other sites. The only information I came across was that the actual nozzle acts as an ejector of sorts...Just that the nitrous fog draws a suction on the fuel nozzle and depending on the nitrous pressure it can adjust the amount of fuel drawn by a few percent in each direction(high and low). Im hoping it is more advanced than that...but I have yet to find a good answer. Any thoughts?
#4
Heard back from zex and it is just as I thought....check it out.
Josh there are many misconceptions about the NMU. It is only a good looking
way to contain the solenoids and the wiring needed for the TPS activation.
It has no sensors or anything that monitors AF ratio or any thing like that.
Now the ZEX nozzle design is what actually does a lot of what people think
the NMU does. The ZEX nozzle has Fuel Shear and Active Fuel Control
Technology. The Fuel Shear Tech. injects fuel using a fuel transfer tube.
This tube allows the fuel to inject in the highest velocity area of the
nitrous plume. This allows for the best possible fuel atomization ensuring
one cylinder does not go dangerously rich or lean. Active Fuel Control Tech.
is a safety feature that basically allows the level of fuel drawn from the
nozzle to vary depending on bottle pressure. This way your nitrous never
goes lean or rich due to changing bottle pressure or temperature changes.
Many people mistakenly believe this to be controlled by the NMU but it is
not. I hope this has answered your questions.
Aaron Mick
COMP Cams Technical Consultant
Josh there are many misconceptions about the NMU. It is only a good looking
way to contain the solenoids and the wiring needed for the TPS activation.
It has no sensors or anything that monitors AF ratio or any thing like that.
Now the ZEX nozzle design is what actually does a lot of what people think
the NMU does. The ZEX nozzle has Fuel Shear and Active Fuel Control
Technology. The Fuel Shear Tech. injects fuel using a fuel transfer tube.
This tube allows the fuel to inject in the highest velocity area of the
nitrous plume. This allows for the best possible fuel atomization ensuring
one cylinder does not go dangerously rich or lean. Active Fuel Control Tech.
is a safety feature that basically allows the level of fuel drawn from the
nozzle to vary depending on bottle pressure. This way your nitrous never
goes lean or rich due to changing bottle pressure or temperature changes.
Many people mistakenly believe this to be controlled by the NMU but it is
not. I hope this has answered your questions.
Aaron Mick
COMP Cams Technical Consultant
#7
I'm contemplating getting rid of the egr assembly and using an 02-04 fuel rail that I have laying around
#9
#10
wouldn't removing the egr lower temps and lean it out slightly?
#11
no...the exhaust actually retards some of the combustion and the exhaust temp is lower...you can find some interesting dynos of different cars that have done this...a few will show tthe exhaust temps...you can also read about it.
#15
no prob...no the zex controller does none of that...its the nozzle design that allows a slight fluctuation in fuel delivery as your bottle pressure changes. It basically creates a vacuum to draw a little more or less fuel to assist in the fuel pressure you are already sending through the nozzle. Hope this helps.
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