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Ok, the data isn't mine, although the chart is. As you can see even a low water/fuel ratio of .2:1 allowed an increase in knock-limited boost from 3.2psi up to 8.9psi with a 12.5:1 AFR. Now that's water alone, NOT water/methanol which is even more effective. Water is cheap, and that's the ultimate in cheap protection.
With a richer mixture and a lot more water, knock-limited boost went up to 20.3psi, although that's sort of misleading because you could never raise the boost that much and maintain the same low air temperature at the intake valve.
The chart has been removed.
Greg
Last edited by Greg Gordon; 03-18-2008 at 07:46 PM.
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