Snow Performance Boost Cooler Manual page 15

Use the SaveAs feature to save various calibrations under different names so you can go back to a previous
calibration if the latest one doesn't work out.
Always apply changes to the unit with the Write All button – don't use the Write button
Finding a Boost reference: Boost pressure will be present anywhere after the compressor ( turbo/
supercharger). Many times a vacuum T can be used to tap into an existing vacuum/boost line, but on
newer engines and some superchargers there may not be any lines to use. In this case a threaded
hose bard or boost port will need to be screwed into the charge pipe or manifold to get a good boost
reading. The Bosch map sensor included in this system is rated up to 40 PSI, damage to the sensor
Finding an RPM signal: For a vehicle with port injection or sequential fuel injection you may find a
square wave signal by tapping into a fuel injector wire. For a direct injected engine the easiest way is to
Calibrating the RPM signal: The Stage 4 controller will read in pulses per revolution through the
yellow wire. Under the SETTINGS tab, change the pulses to revolution to ½ the number of cylinders.
Calibrating the MAP sensor: Select the MAP sensor calibration tab and enter the values from the
sticker on the map sensor for Slope, Intercept and Atmosphere in the CURRENT ACTIVE box then hit
calibrate. This will in essence zero the MAP sensor for your elevation. Make sure the engine is OFF
The power potential of the system is realized through increased boost and/or timing. The large gains on
octane and cooling provided by the system make this possible, even on standard pump fuel.
The Boost Cooler® adds an alternate fuel source as well as significantly cools combustion. With the
Boost Cooler®, one does not need to cool combustion with overly rich air/fuel ratios. To minimize
combustion quench, you should start with an air to fuel ratio of 12.0-12.5:1. Injecting water/methanol
lower than 3300-3500 RPM could result in combustion quench.
All vehicles are different. If the engine bogs or loses power, then injection is starting too early, the
quantity is too much, or there is not enough methanol in the mixture (50/50 water/methanol
can occur if it is subjected to higher pressures.
find the proper pin # on the OBDII port and tap into that.
during this adjustment.
Tuning Quick Reference
recommended).
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