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Q: What ratio of water/methanol is recommended?
A: A 50/50 ratio is recommended for maximum performance and safety. Ratios of anywhere from 30%
to 50% methanol work well and deliver excellent octane gains and cooling without over richening the air
fuel ratio.
Q: Can I use pure methanol?
A: While all components of Snow Performance systems are designed to be able to handle 100% pure
methanol, it is not recommended for a number of reasons.
• Safety: Pure methanol is easy to ignite with a low 140F degree flash-point and burns with an invisible
flame.
• Performance: Water absorbs almost twice as much heat as methanol in the intake and inside the
combustion chamber. Water cannot be flash-ignited, so has what is almost an infinite octane number. In
the government studies for WWII piston-powered aircraft, 50/50 water-methanol was found to be the
best fluid to use for auxiliary fluid injection.
Q: Can I inject water/methanol with nitrous?
A: Yes! With nitrous, water/methanol injection allows the use of more timing advance even with large
(250HP+) quantities. The cooling effect of the water/methanol inside the combustion chamber also
makes for reduced peak combustion temperatures.
Q: Should I mount my nozzles pre or post turbo/supercharger?
A: • Centrifugal Supercharger/Turbo: Never mount an injector nozzle before a centrifugal supercharger
or turbocharger compressor. Sending fluid through the compressor wheel that spins anywhere from
50,000rpm to 250,000rpm can erode the leading edges of the fine aluminum. Studies performed by
SAAB, concluded that pre-turbo injection will over time cause cavitation on the turbo wheel leading
edges.
• Positive Displacement Supercharger: Mounting the nozzle before this style of blower is perfectly safe
and actually provides some additional benefits. The small amount of water-methanol fluid isn’t harmful
to any rotor seals or surfaces or coatings. Additionally, it keeps the rotors and housing MUCH cooler,
which reduces heat transfer to the rest of the intake and air charge.
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