Intake "Air Charge Temperatures" should be the reason why you use or do not need a Inter-cooler/ methanol injection, etc to keep the intake temps within a specified number.
If you have a Efficient Boosting Device that has an efficiency of .78 vs say a Roots Supercharger that is in the .56 range you possibly do not need a different fuel like Methanol to keep the engine alive or an inter-cooler.
Some Boosting systems have been used with Inter-coolers, others with water/methanol injection like the Snow Injection Systems.
To answer your question, Scott65, take a look at what Charlie66 has on his 4 cylinder Turbocharged Pontiac Engine. He has Fuel Injection, runs E-85 Fuel, runs an Inter-cooler, and has boost levels in the 30 psi to 43 psi range.
A engine at 12 psi might get by with just a different fuel and careful tuning.
NOS systems made great power but you were constantly tied into the Bottle Refilling
"Trap" where when the bottle was empty, you had less power.
Belt driven devices and Turbochargers eliminate that situation for the most part.
A good Street Centrifugal Supercharger can be mounted under the hood, make 1000 HP easily, and no one is the wiser. Same deal with a Proper Turbo System.
John Clegg has a 2400 hp Centrifugal Supercharged "Pontiac Race Car".
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
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