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Gasoline Specific Gravity.
This program corrects the specific gravity readings of racing gasoline based on the temperature
of the fuel. Hydrometer readings of the same fuel will vary with the temperature. The fuel supplier
can provide the reference specific gravity and the reference temperature at which that specific
gravity was taken. Knowing what the specific gravity reading should be at a given temperature
will verify that the fuel is not degraded.
Press TUNE-UP then select Gas. Spec. to start this program.
Display Example:
==Gas Spec Grav=
Ref SpGr? 0.7265 (Enter factory reference specific gravity)
Ref Temp? 60.0 (Enter factory reference temp
F)
Fuel Temp? 67.5 (Enter measured fuel temp
F)
SpecGrav= 0.7231 (Specific gravity fuel should measure)
Methanol Specific Gravity.
This program corrects the specific gravity readings of methanol (alcohol) racing fuel based on the
temperature of the fuel. Methanol will absorb condensation inside a fuel container or moisture
from the air. If moisture is present in a fuel sample the hydrometer reading will be higher than
expected. Knowing what the specific gravity reading should be at a given temperature will verify
that the fuel is not degraded.
Press TUNE-UP then select Meth. Spec. to start this program.
Display Example:
=Meth Spec Grav=
Fuel Temp? 85.0 (Enter measured fuel temp
F)
SpecGrav= 0.7823 (Specific gravity fuel should measure)
Nitromethane Percent.
This program corrects the measured nitromethane content of a fuel sample for temperature.
This program is designed to be used with special nitromethane hydrometers that are based on
either a 60 or 68 degree Fahrenheit temperature standard. These hydrometers read in percent of
nitro as opposed to the actual specific gravity.
Press TUNE-UP then select Nitro % to start this program.
Display Example:
= Nitro Percent =
Hydro? 60 (Enter hydrometer temperature standard)
Fuel Temp? 78.0 (Enter measured fuel temp
F)
Nitro %= 85.0 (Enter hydrometer measured nitro %)
Corr Ntr%= 89.5 (Corrected nitro %)
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