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Join Date: Apr 2002
Location: Houston (Clearlake), TX
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Originally posted by RarlyL8
Sense I am playing Devil's advocate I'll add this:

Nither CIS or EFI have anything to do with the ignition system.

They are fuel delivery systems. If we want to include ignition then we should use the term "engine management system". You can run an ignition management system with CIS. It has been done by a few folks here on Pelican.
I think the ignition improvements with an ECU are even more important than the fuel improvements. Especially when off boost. When I took the EFI101 course, Ben Strader showed us the power change with the fuel mixture off a bit, it was a small change. Then he showed us the power change with the ignition off a bit, it was significantly bigger difference. Since the ignition is tuned for each load and rpm cell rather than just RPM, this can be a significant improvement.

So you'd be giving up one of the big advantages by using an EFI system without ignition control.
2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 07-18-2007, 03:03 PM
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