Nate Crisman
10+ Year Contributor
- 749
- 6
- Nov 26, 2008
-
Blairstown,
New_Jersey
Tomorrow plan at island Dragway: work up to .052 nitrous jet for 125 shot and start transitioning to Methanol fuel. I will mix in with e85 starting with 25% and mix in more and more Methanol each run until we run out of delivery capacity.
This car will be eating methanol, ethanol, gasoline, nitrous oxide, and pressurized turbo air. Getting to need to have a damn chemistry degree to tune this thing.
Any tips, suggestions, comments, or advise?
Here's what I have figured out from lots of google searching:
Best power Lambda range for each fuel:
Gasoline: .83 to .86 (AFR gasoline scale: 12.2 to 12.5)
E85:....... .76 to .82 (AFR on gas scale: 11.2 to 12.2)
Methanol: .50 to .62 (AFR on gas scale: 7.4 to 9.2)
Seems that methanol likes to run pretty stupid rich, while E85 will run well just a little bit richer than gasoline. So Im guessing that my ideal target AFR reading from the innovate wideband will be different at each ratio of E85/methanol. On a side note, Iv read about how most of the LSU wideband sensors aren't even in the ballpark in the .5 to .6 lambda range so the "tuning" on methanol is likely not even within the range of the sensor.
of E85/Meth mixture ratio:
on a 75/25 mix I should target about 11.5 AFR (gas scale wideband)
on a 50/50 mix: ~10.8 AFR
on a 25/75 mix: ~10.0 AFR
100% meth:.... ~8 to 9 AFR
Am I being stupid here?:rtfm:
This car will be eating methanol, ethanol, gasoline, nitrous oxide, and pressurized turbo air. Getting to need to have a damn chemistry degree to tune this thing.
Any tips, suggestions, comments, or advise?
Here's what I have figured out from lots of google searching:
Best power Lambda range for each fuel:
Gasoline: .83 to .86 (AFR gasoline scale: 12.2 to 12.5)
E85:....... .76 to .82 (AFR on gas scale: 11.2 to 12.2)
Methanol: .50 to .62 (AFR on gas scale: 7.4 to 9.2)
Seems that methanol likes to run pretty stupid rich, while E85 will run well just a little bit richer than gasoline. So Im guessing that my ideal target AFR reading from the innovate wideband will be different at each ratio of E85/methanol. On a side note, Iv read about how most of the LSU wideband sensors aren't even in the ballpark in the .5 to .6 lambda range so the "tuning" on methanol is likely not even within the range of the sensor.
of E85/Meth mixture ratio:
on a 75/25 mix I should target about 11.5 AFR (gas scale wideband)
on a 50/50 mix: ~10.8 AFR
on a 25/75 mix: ~10.0 AFR
100% meth:.... ~8 to 9 AFR
Am I being stupid here?:rtfm: