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Jeff Alton Jeff Alton is offline
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Join Date: Jan 2003
Location: Langley,B.C.
Posts: 10,750
My motor is NA but it may give some help for you. Off throttle down hill (big vacuum) I will 20:1 AFR's. I run 40PSI constant. When the tuning was still only roughed in at idle I had 10.5:1AFR and it was not smoking, it would smell rich, but no smoke. IF you are seeing black smoke at idle, it is reallllllllllllly rich!

Turn3 Autosport- Full Service and Race Prep
997 S 4.0, Boxster 2.7 Race Car, Cayman S 3.8, 958 Cayenne TT, VW GTI 2.1 TSI, Mini Cooper S JCW, Cannondale Supersix EVO SRAM RED E-tap, Cannondale Slice SRAM RED E-tap, Giant Roam Hardtail- to ride with the wife.
Old 03-18-2008, 04:25 PM
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