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Kaefer Kaefer is offline
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Join Date: Sep 2004
Location: Central Va
Posts: 3,630
Originally Posted by Reanimotion View Post
The testing fasteddie did on the lambda system noted earlier in this thread suggested there was an impressive range of control available without needing a non-stock WUR. Altering the control pressure via the WUR changes the current position of the air metering plate but does not alter the total amount of fuel available at 100% air plate swing. The Frequency valve on the other hand alters fuel flow itself, providing more or less than normal for any given position of the air plate. I believe the Frequency Valve circuit is the key to extra fuel at the top end for a standard fuel head.

I believe I'll be diving into FrankenCIS by using it to control the lambda frequency valve on my '87 930 in the quest for additional fuel in high RPMs / high boost. Then as I get more comfortable with the system I'll start utilizing it's other features.

So.... I need to put together a parts list for this simple system. Does the following list sound right?

- WBO2 controller with AFR outputs. I already have an Innovate MXT-L installed.
- MicroSquirt EMS V3.0 with wire harness.
- Pigtail/connector to connect Microsquirt harness to stock CIS lambda frequency valve.
- FrankenCIS firmware.

Thanks for everything you've done for CIS cars!
'87 911 turbo, '10 Cayman S
In the past - '71 T, '77 S 3.6, '80 SC, '88 3.6 cab
Old 03-13-2016, 02:19 PM
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