I do not believe Webers will increase power or performance. I believe that ROW SCs had different fuel distributors than my car. This would have been so that fuel volume would be tuned to an engine with a more free flowing exhaust system.
I believe that Webers become necessary when you change the air flow characteristics, such as when you change cams, pistons and cylinders, or perhaps exhaust. But I feel convinced that, without other modifications, you will decrease the engine's power and smoothness if you remove the CIS system. It is already "jetted" perfectly for the motor it was developed for.
This has been my expereience with CIS systems, but I admit Porsches are a new game for me.
Webers look tougher though. More manly, if you'll excuse the expression.
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'83 SC
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