More Power from CIS
03-17-2002, 02:39 PM
#1
More Power from CIS
I have a exhaust gas analyzer and in looking at the manual I notice that maximum engine power is obtained at a rich A/F ratio of about 12.5 to 1, CO level of 5 to 6%. I have a 78SC with emissions optimization by removal (no air pump or cat). Has anyone run a CIS system at 5 to 6% CO for more power? If so, any results to report? I suspect you could also advance the ignition timing with a richer mixture. What you give up is fuel economy, but what the hell....it's a Porsche.
03-17-2002, 07:00 PM
#2
3rd Gear
Join Date: Mar 2002
Location: Del Mar, CA
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Hi
I would also like to adjust the CO. Where can I get a CO analyzer? By the way it seems to me that the ecu and the O2 analyzer will defeat your
efforts to enrichen the mixture except for startup. Am I wrong? Is there a way to defeat the
ECU to get a rich mixture?
Good Luck John
I would also like to adjust the CO. Where can I get a CO analyzer? By the way it seems to me that the ecu and the O2 analyzer will defeat your
efforts to enrichen the mixture except for startup. Am I wrong? Is there a way to defeat the
ECU to get a rich mixture?
Good Luck John
03-17-2002, 07:30 PM
#3
The 78's didn't have an O2 sensor. You are right about the ECU function, but that's just one more thing to take off.
Run a web search on exhaust gas analyzers. There are a number for sale. I've had an XKE for many years so I have an old Heathkit analyzer I use on the SU's.
Run a web search on exhaust gas analyzers. There are a number for sale. I've had an XKE for many years so I have an old Heathkit analyzer I use on the SU's.
