What is the air fuel ratio that makes the most power on an LT1? I have a wideband installed in my car just after the y pipe (no cats) and am actually getting an A/F ratio of 12.8 - 13 under power enrichment at WOT. I was wondering if I should lean it further to around 13.5 but have read that the gains in maximum power is small when going from 13 to 13.5.
Anyone with dyno experience wants to speak out?

 

I say 12.8-13.2. How much was your wide band o2. I've heard their pretty expensive (2-300). I guess you have it hooked up to an A/F gauge?

 

I paid about $350 for the system. I also got the auxiliar input cable that allows you to log other data as well as the A/F ratio. Use that for RPM. The unit is sef contained and has its own display. I just hook it up for tuning.

 

personally i think this article does a good job explaining the effects of air-fuel ratio.

It is believed by many that leaner = more power/hotter burn.
Well, check this article out.

http://www.maintenanceresources.com/...inebalance.htm

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John
aka - Mechanical Engineering Student 101