Author	Subject: Air fuel ratio
phillipm Seasoned Pro Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline	Post #26 No, 14.7 is stoich, 12 is good to aim for on a turbo/lightly boosted car, somewhere around 13 for a N/A motor, although that depends on whether you want/need to run rich for cooling in some areas. It generally isn't critical to be absolutely cock-on fueling wise for power though, not unless it's a massively boosted monster. ________________________________________ - Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM me Email me! Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces.
Posted 5th Jun 2012 at 23:08 Profile

yanni Regular Location: Thessaloniki Registered: 02 Nov 2006 Posts: 309 Status: Offline	Post #27 So i take it that running around 14.7 to 15.0 is fine then. ________________________________________ Major stock holder of group P.S.A. I live to pay and support the French industry.
Posted 5th Jun 2012 at 23:11 Profile

phillipm Seasoned Pro Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline

Post #28 Not at full throttle, no (part-throttle, perhaps), it'd be costing some power and running too hot in the cylinders, you want to be on the rich side of that, 13-13.5 is usually about right. ________________________________________ - Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM me Email me! Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces.

Posted 5th Jun 2012 at 23:12 Profile

fatlapit Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline	Post #29 My bad only used to boosted motors ________________________________________
Posted 5th Jun 2012 at 23:16 Profile

smegal Seasoned Pro Location: Leeds Registered: 26 Dec 2005 Posts: 5,940 Status: Offline	Post #30 Mine (poor cam timing) Supercharged ________________________________________ Ex SC-6 Now in a Megane R26
Posted 6th Jun 2012 at 00:46 Profile

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