Nitrous Express CARBURETOR PLATE SYSTEMS - Manual (Page 7)

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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 compression 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 high 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 larger fuel jet to compensate for the lighter fuel. If you use a fuel with a higher “SG”,
a smaller fuel jet 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 oxidizes 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 an 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!
J. For a fuel recommendation, contact your NX dealer.
19. All vehicles, including full competition race cars, must have an alternator to provide adequate amperage required
by today’s racing accessories. Add up all the amps required by your car, you’ll be surprised!
20. If you have trouble with your NX system or any related parts, call your dealer first. If you still need help call the
factory tech line 940-767-7694 9:00AM-5:00PM CST Mon-Fri. We are the nitrous experts and will give
straight answers to your questions.
In conclusion……….
This instruction sheet and power tuning tips are valid only for a NX system. If you have a kit from another
manufacturer this information will not help you! A tune up from any other brand of nitrous kit will not work with
the NX “Next Generation” technology.
DO NOT LISTEN TO:
A. YOUR BUDDY!
B. YOUR BUDDY’S FRIEND!
C. THE LOCAL NITROUS GURU!
D. ANY ARTICLE IN ANY MAGAZINE
If you follow the foregoing suggestions, your NX system will operate trouble free and provide years of thrills.
ABOVE ALL REMEMBER TO RACE SAFE AND HAVE FUN!
NOTE: If your intake manifold has a “CLOVER LEAF” design plenum, such as a Brodix or Offen- houser, the
side bulges must be removed, either by machining or grinding before you use the “GEMINI TWIN”, “GEMINI
TWIN PHASE II” OR “GEMINI TWIN PHASE III” design plate system
*Hitman Systems are base-model systems. They do not include WOT, wiring harness, relays, and wiring
accessories.