6.0:1 Rich run limit
9.0:1 Low power, black smoke
11.5:1 Rich best torque at WOT
12.5:1 Safe best power at WOT
13.2:1 Lean best torque at WOT
14.7:1 Chemically ideal
15.5:1 Lean light load, part throttle
16.2:1 Best economy, part throttle
18-22:1 Lean run limit[
Gasolene Air/Fuel Ratio Limits
-
- Site Admin
- Posts: 1713
- Joined: Sun May 20, 2007 11:08 pm
- Location: Barbados
- Contact:
Gasolene Air/Fuel Ratio Limits
Air/Fuel Ratio Limits
-
- Site Admin
- Posts: 1713
- Joined: Sun May 20, 2007 11:08 pm
- Location: Barbados
- Contact:
E85 Air/Fuel Ratio Limits
Max Rich Torque of E85 is 7.1:1- 8.5:1
With that being said, here is what i would consider a very safe and conservative fuel tune on E85. *AFR's listed in bold are for widebands o2s that are calibrated for gasoline, AFR's in ( ) are actual E85 AFR:
Here are some common AFR conversions(Gas AFR on left, e85 on right):
With that being said, here is what i would consider a very safe and conservative fuel tune on E85. *AFR's listed in bold are for widebands o2s that are calibrated for gasoline, AFR's in ( ) are actual E85 AFR:
- Part Throttle lean (max eco) AFR of 16.5:1(11.0:1) 12.4% leaner than STOICH
Part Throttle rich AFR of 14.7:1(9.8:1)
Spool up... AFR of 13.5:1(9.00:1)
WOT... AFR of 12.1:1(8.06:1) 17.7% richer than STOICH
Here are some common AFR conversions(Gas AFR on left, e85 on right):
- 18.0:1=12.000
17.5:1=11.666
17.0:1=11.333
16.5:1=11.000
16.0:1=10.666
15.5:1=10.333
15.0:1=10.000
14.5:1=9.666
14.0:1=9.333
13.5:1=9.000
13.0:1=8.666
12.5:1=8.333
12.0:1=8.000
11.5:1=7.666
11.0:1=7.333