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Old 02-25-2008, 04:36 AM
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BootCamp
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Default RE: (Forced) Induction System Options

1. Thanks that is the correct answer.......there is no air flow thus you cannot just drop a belt.

I had heard of several companies years ago that had an electric clutch and at the flip of a switch could free spool teh supercharger and at the same time open up an inlet for free breatching but I have not heard anybody doing that these days I think because of reliablity problems. If anybody is doing that anymore please let me know.


2. Superchargers are always physically connected to the crank thus they have parasitic drag and therefore hurt fuel economy. Turbos can actually increase fuel economy during normal driving. What you have to watch out for is the incredible eat generated from the Turbos due to the exhaust gases. With a good design Turbos are better for fuel economy during normal driving.

3. Turbos are easier on powertrains than superchargers because they bring on power easier. Turbos usually do not have boost at 2K RPM while a supercharger can have boost as low as 1.5K RPM.
All correct.
BTW - Because the old style superchargers were "roots" types, they did have electric clutches available as you referred to. The new superchargers (being used on most street applications, such as F1's and Paxtons) operate differently and can't be disengaged with an electric clutch.