Step One: As we talked about, a spark plug gap that is too large can easily be quenched . We have found that a spark plug gap of 0.028 works well for most vehicles. Also, ensure your plugs are relatively new with nice sharp edges on the electrodes.
Step Two: Set boost pressure at your desired level. Not all applications will have adjustable boost pressure. On newer vehicles turbo pressure may be electronically controlled. On supercharged applications boost pressure will be determined by pulley size.
Step Three: Pick the right nozzle(s) ! A nozzle that is too large will cause quench regardless of adjustment, and a nozzle that is too small will not give the full benefit of the system and leave power on the table. See the instruction manual for correct nozzle sizing for your power level. The use of too large a nozzle is the number one reason for poor performance.
Step Four: Before activating your Snow Performance Water-methanol system it is time to eliminate those variables we were talking about. With conservative ignition timing, tune for an air fuel ration of 12.0:1 across your operating RPM range. This will establish a solid tune and base line to add water meth on top of. This can be done on a dyno with specialized tools or with several aftermarket devices and tuning software for the do it yourself mechanic. If 12:1 seems on the lean side, remember, you don’t need to cool combustion with fuel now – water-methanol is now providing all the cooling needed.
Step Five: Controller settings -To initially set up your controller injection points set your “start” injection point at approximately half of your maximum boost pressure. Then set the “full” injection point to your peak boost pressure. For most vehicles this will result in a conservative water-methanol injection curve.
Step Six: Turn on your system and make a run ( Dyno or street ). Ideally you will see the air fuel ratio richen by half a point ( 0.5 ) if using a 50/50 water-methanol mix. If power goes down, you are injecting too much. Trim injection by raising the “start” point and/or increasing the “full injection setting. If you find yourself severely adjusting your injections points to avoid quench you may need a smaller nozzle(s) ). If your air fuel ratio does not richen, the system may not be injecting enough, adjust water methanol injection up and ensure your system is spraying. Again, the goal in these adjustments is to start “fat” and trim injection so all quench is eliminated.
Step Seven: It is now time to take advantage of the increased effective octane and cooling and start adding some timing! Advance timing in 2 degree increments until power plateaus and then back it off by 2 degrees. This will give you the most power increase. Most will stop short of this point and add 4 degrees for a 30-50 hp gain – you decide.
Step Eight: Enjoy your new safe power! Your vehicle is now producing more power and is protected.