Nitrous Express Hitman EFI - Manual (Page 6)

system. Do not attempt to use any other brand kit
as a second stage with this system. Our nitrous
technology is far superior to any of our com-
petitors. Any attempt at this could lead to serious
engine damage.
11. All of our systems are designed to operate at
1000-PSI bottle pressure. This is extremely
important and cannot be stressed enough. If your
bottle pressure is below 1,000 PSI the system
will run rich and will not produce the advertised
horsepower. If the bottle pressure is above 1,050
PSI the system will run lean, possibly damaging
engine parts. This pressure is easily monitored
by using a NX liquid filled pressure gauge (PN
15509). Note: When the ambient temperature is
below 97 degrees a bottle warmer is required (PN
15940 or 15941). An NX bottle jacket (PN15945
or 15946) will help stabilize bottle pressure in the
winter and summer.
CAUTION: NEVER USE AN OPEN FLAME TO
HEAT A NITROUS BOTTLE. THIS IS A VERY
DANGEROUS AND POTENTIALLY FATAL
PRACTICE!!!!!!!!!!!
12. A purge valve (PN15600-15601) is recommended
on all NX systems. When the weather begins to
get hot a purge valve is worth up to a tenth of a
second on a 1⁄4 mile pass. Note: The correct purg-
ing procedure for drag racing is: 1. Complete the
burnout. 2. Light the pre-stage bulb. 3. Push
the purge button three times, one second each. 4.
Stage immediately, GO FAST.
13. If there is a question about the purity of your
nitrous supply, a filter (PN15610 or 15607) should
be used when refilling your bottle. Just attach the
filter to your bottle when you take it to be refilled.
Contaminated nitrous will cause serious damage
to the nitrous solenoids and possibly to your
engine. This is a lifetime renewable filter.
14. If you have questions about the suitability of your
torque converter or gear ratios, call the factory
tech line for the inside scoop.
15. Your nitrous bottle should be turned off when
not in use (even between runs). An NX remote
bottle opener (PN11107) will make this task much
easier.
16. Start with the lowest power setting in your system.
Don’t try to be the track “Hero” on your first pass.
Remember start out small and work your way up,
NX systems produce more real horsepower than
any other brand on the market today.
17. If the solenoids must be disassembled for cleaning
or rebuilding always use the proper wrench (PN
15921). Do not use any clamping devise on the
solenoid tower, instant non-warranty, damage will
result.
18. If you run an NX system of 150+ horsepower you
must use a high octane racing type fuel. These are
some tips to help you choose and maintain the cor-
rect fuel for your application:
A. The most important statistic you should look
for in the fuel specifications is the “MON”
or motor octane number. In most cases the
higher the number the more timing you can
run and detonation will not be a problem
B. Most V-8 or V-12 engines with stock com-
pression will run on “93” unleaded pump gas
with up to 150 horsepower boost, most 4 or 6
cylinders with stock compression can use up
to 75 horsepower.
C. Racing engines with 10-1 compression or
higher must run racing fuel. The higher the
compression, and the higher the boost, the
higher the “MON” must be.
D. With nitrous usage usually the highest “MON”
available is the one that should be used.
E. All NX systems are calibrated to use fuel with
.730 specific gravity or “SG”. If you use a fuel
with a lower “SG” you must use a higher fuel
pressure to compensate for the lighter fuel. If
you use a fuel with a higher “SG”, a lower
fuel pressure will be required. Most unleaded
pump gas is .730 SG or above
F. Racing fuel should be stored in an airtight,
dark container. Exposure to atmosphere
allows very important elements to evaporate,
lowering the octane of the fuel. Sunlight oxi-
dizes the lead contained in racing fuel, since
this is the most important ingredient used to
raise octane it must be protected.
G. Never leave the fuel in your car between
race days. This allows evaporation of the
very important “High end” hydrocarbons and
lowers the octane of the fuel.
H. Never buy racing fuel from and underground
or vented storage tank. Always demand to
see where and how the fuel is stored, a sealed
drum is the only correct way.
I. AV gas or aviation fuel is not compatible with
nitrous usage, don’t be tempted by the cheap
price, instant engine damage will result!