Greg, Perhaps they weren't making intercoolers that fit your application. They have been making intercoolers since the 1920's. Super and turbosupercharged diesel trucks have been using them for ages. Early supercharged aircraft also used "aftercoolers" which is the same device with a different name.
 Water injection IS another perfectly legitimate way to beat detonation though. The P47 and P51's used BOTH intercoolers and water/methanol injection for maximum military power. Hard climb in a dogfight or to run from the battle when needed were both possibilities. It must have been serious when you had to make more than 1200 HP!
Bill Jepson

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because they weren't making intercoolers at the time

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-----Original Message-----
From: Greg Ward <gregw@onestopdesign.biz>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, 10 Dec 2007 12:44 pm
Subject: [FlyRotary] Re: Methods of charge cooling was Water/Meth injection