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NoDOHC · 11-16-2010, 08:44 PM

I wish you would post AFR on the graph (or are you not logging it to the dyno?)

I am curious what more experienced Turbo engine tuners run, as a lot of people I talk to say nothing lean of 11:1 and I think that is leaving a lot of power on the table.

Peak power (for pump gas) is 13.3:1 (0.9 lambda). There is not much gain to be had lean of 13.0:1. As far as I know, this holds true for any chamber pressure - it is definately true for naturally aspirated applications.

Your VE must be relatively high if you are running 11:1 AFR.

11-16-2010, 08:44 PM	#28
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	I wish you would post AFR on the graph (or are you not logging it to the dyno?) I am curious what more experienced Turbo engine tuners run, as a lot of people I talk to say nothing lean of 11:1 and I think that is leaving a lot of power on the table. Peak power (for pump gas) is 13.3:1 (0.9 lambda). There is not much gain to be had lean of 13.0:1. As far as I know, this holds true for any chamber pressure - it is definately true for naturally aspirated applications. Your VE must be relatively high if you are running 11:1 AFR. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)