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Originally Posted by hotrod
You need the most water near max torque rpm at high load than you do at higher rpm.
A combination of the two systems is probably the best to get the most detonation protection for the least use of water.
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For most smaller displacement engines, namely the turbocharged 4-cylinders most all on this forum run, max torque and thus max cylinder pressure will fall somewhere in the 4000-6000 RPM range. Delivering the highest volume of water at this point and then tapering off as RPMs rise will give you your best results.
An MF2 set up with a 3D boost and RPM map comes to mind. :wink: