Originally Posted by

**B00STJUNKY**
So, just some thoughts on this from my perspective.

Theoretically, you would ideally run the same Lambda value regardless of fuel type (Gasoline, Alcohol, etc...). Our Gen3 Hemis tend to like to run richer than other platforms, usually in the low 12's for N/A, and at least in the mid-to-low 11's for forced induction setups.

Your setup appears to be N/A, so let's say an Ethanol-free Gasoline AFR target of 12.2. 12.2/14.7 = .8299 Lambda. Obviously the FA stoich value for Ethanol-free gasoline is .0680, and a PE Enrichment of .0139 to achieve your target of 12.2.

Now, for e80, your stoich AFR is 10.14, or FA of .0986, as you said. The lambda value of .8299 multiplied by the stoich AFR gives you your desired PE AFR, so: 10.14*.8299 = 8.42. Then, of course the inverse of that would be your FA value: 1/8.42 = .1188. Now, subtract total FA from stoich to see what your PE FA adder values should be: .1188-.0986 = .0202

So, .0202 is what I would personally use as a PE Adder for an N/A setup, assuming I wanted to run an equivalent Lambda for Ethanol based fuels as I would run for Gasoline based fuels.

With the stoich plus the PE FA values you're currently running, and using Lambda or Equivalency Ratios to compare to Gasoline AFRs, your current Lambda/EQ Ratio would be akin to targeting about 12.72 AFR in the gasoline scale. It's a little bit leaner than I suspect you might want to be. Not on the verge of hurting anything per se, just leaner than Hemi's usually run. But perhaps that was on purpose, so take all this with a grain of salt.