speedwaydesign
New member
I need air fuel ratios. Gas and alcohol. Question: Will all grades of Methanol have the same
air/ratio?
air/ratio?
Air fuel ratios
- Thread starter speedwaydesign
- Start date
alvin l nunley
Site Supporter
Just approximately.
Gasoline 14 – 1
methanol 6 – 1
So it takes just a little over twice the alcohol versus gasoline.. These are approximations, not hard and fast rules.
If your carburetor uses jets, you want to double the area of the jet hole. "Area", not diameter. Pi x radius ^2
If you have a .038" jet, a .054" jet would be right at twice the area. Same for the low-speed jet, twice the area.
Gasoline 14 – 1
methanol 6 – 1
So it takes just a little over twice the alcohol versus gasoline.. These are approximations, not hard and fast rules.
If your carburetor uses jets, you want to double the area of the jet hole. "Area", not diameter. Pi x radius ^2
If you have a .038" jet, a .054" jet would be right at twice the area. Same for the low-speed jet, twice the area.
steve baker
Moderator
We have found this to be best overall average and no not all Methanol will have same A/F ratio.
Gasoline 12.2 A/F
Methanol 4.9 A/F
www.Bakerracingengines.com
speedwaydesign
New member
Good answers. I have an onboard A/F gauge plus exhaust temp/ I will be running gas at some tracks but mostly alcohol. Some methanol is better than others so I can get some help from my gauges to get it right,
One more question =Is 13:1 compression o.k. with methanol? Predator engine.
One more question =Is 13:1 compression o.k. with methanol? Predator engine.
steve baker
Moderator
Owe yea