pro94lt

I'm trying to find an idea of what they should look like, should the numbers be negative? please help I'm new to this

2xLS1

iTrader: (25)

Air Fuel Ratio per Andrew =
(1 - ([# in Temp Table] + [# in RPM Table])/100)*14.7



A/F Ratio per Jody Shapiro =
14.7/(1+Number in the Cool temp table/100+ number in the RPM table /100)

Using either formula:
If your car runs around 180 degrees use the value of 16 that is in the PE cool table alone and change the value in the RPM table to get to the AFR you think you want

Both formulas will give you roughly the same answer but I think Jody's is more accurate. Or so I've heard. Just remember that with these formulas, the PCM will think it's supplying the AFR that it calculates but in actuality that might not neccesarily be the case.


Download the attached file. Then change the .doc extension to .xls and open it with Excel. Copy and paste your rpm #s into the cells and it will calculate the commanded A/F for those values.

Russ K

iTrader: (1)

This is how I set up the PE tables to command a 13.0 AFR at operating temps on the LT1/LT4 cars. Then scale the Maf so the actual AFR matches.

Also enter 14.7 in all cells above 68*C in the open loop AFR vs coolant temp vs map table.

Russ Kemp

pro94lt

thanks guys, I somehow had mine so far off It was pouring smoke out like it was burning coal, I guess I somehow saved my changes to the original bin on accident.

Thanks again. Great help on here.