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Kaefer Kaefer is offline
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Join Date: Sep 2004
Location: Central Va
Posts: 3,629
Originally Posted by Reanimotion View Post
if the fuel head is unmodified and the lambda valve is functional but disconnected (unplugged) you now have the head running in max lean mode constantly
The fuel head is modified to the extent of balancing each cylinder AFR with the 6 adjustments. System pressure, warm control pressure, cold control pressure, and full throttle enrichment have been adjusted accordingly to compensate for the lack of 50% duty cycle from the lambda valve.

You're right though. That's why my proposed system should work. Currently the duty cycle of the lambda valve is 0% (disconnected). So any duty cycle above 0% should add additional fuel.

My car currently runs great with the simplified CIS system however I could use additional fuel above 5k RPMs. Once I get it I'd like to bump the boost up to 1 bar, dial it in again with additional fuel, then add your eWUR for more control over the entire system.
'87 911 turbo, '10 Cayman S
In the past - '71 T, '77 S 3.6, '80 SC, '88 3.6 cab
Old 03-17-2016, 06:00 AM
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