lower intake temps, reduce's DET so i can run more boost on my standard engine,
Engine Tuning
Water/methanol injection is generally not considered a bolt-on power adder for forced induction
gasoline applications. Engine tuning is usually required in order to maximize potential power
gain. Water/methanol injection allows for a more aggressive tune to be used while still using
pump gas as your base fuel.
Using a 50/50 mix of water/methanol is recommended for the best combination of air charge
cooling and detonation control. With conservative boost and timing, establish a base AFR that
is one point higher than your final target AFR. For example, if your final target AFR with
water/methanol injection is 11.0:1, set your base AFR to 12.0:1. Once the base AFR has been
set, start injecting water/methanol and adjust the injection flow rate to achieve your final target
AFR. For example, if before injection your base AFR is 12.0:1 and then during injection your
AFR drops to 10.5:1, reduce the water/methanol flow rate until your final target AFR is reached.
It is generally recommended that the flow rate of the injection system be changed in order to
reach your target AFR and NOT your primary fueling. Injection flow rate adjustments can be
made by changing your nozzle selection or by adjusting the “Start PSI” and “Full PSI” settings.
Once the injection flow rate is set to deliver your desired final AFR, boost and ignition timing can
be increased to take advantage of the additional air charge cooling and detonation control.
When injecting the correct amount, a 50/50 mix of water/methanol has been shown to provide
an effective octane of over 110 when using a base fuel of 91-93 octane pump gas. A properly
tuned water/methanol injection system will usually support a typical “race gas” engine tune