What A/F Ratio should i tune the car for ON methanol.

So we can agree that safe tune would be the one thats around 11.5-12 a/f on straight gasoline.

What about with using meth injection....do we still tune for the 11.5-12 a/f or do we tune richer as in 10.5-11?

The reason i am asking is because when i tuned my car this weekend my AFR was right at 12.1 on a straight gas tune, well when i turnd the meth on (using straight methanol), the AFR droped down to high 10s, instead of leaving it there, i leaned it out back out to 11.5ish, should i go back and richen it up?

I believe when you use methanol you can burn more air along with it, thus you got richer. So you can lean it back out to get the best possible afr and more power, or you can leave your afr so that you can use the methanol to counteract the effects of a hot summer day or poor octane gas.

My friend with the 9second GN does this, so the hot weather doesn't effect his car. Give him a slight advantage when everyone else is having heat issues.

all a matter of preference.

Yes change it. I run mine around 10.7-11.0 on the dyno its always leaner on the track by almost a point.

Yes change it. I run mine around 10.7-11.0 on the dyno its always leaner on the track by almost a point.


ok...so if i am runing verified 11.5 A/F per my incar windband on the street during a 4th gear pull on straight methanol should i richen it up to 11.0 or should i just leave it as is?

Do you have a progressive methanol system you can turn up or down?

ok...so if i am runing verified 11.5 A/F per my incar windband on the street during a 4th gear pull on straight methanol should i richen it up to 11.0 or should i just leave it as is?

Are you logging or just watching the gauge? If you are logging and it stays steady around 11.5 you are ok. if you are watching the gauge well um you are nutz and will probably die :) Log a run at the track and adjust based on that but it sounds like you have it pretty close.

Are you logging or just watching the gauge? If you are logging and it stays steady around 11.5 you are ok. if you are watching the gauge well um you are nutz and will probably die :) Log a run at the track and adjust based on that but it sounds like you have it pretty close.

:lol:

Are you logging or just watching the gauge? If you are logging and it stays steady around 11.5 you are ok. if you are watching the gauge well um you are nutz and will probably die :) Log a run at the track and adjust based on that but it sounds like you have it pretty close.

lol..na i log it :p

Yes change it. I run mine around 10.7-11.0 on the dyno its always leaner on the track by almost a point.

or you can always use a load dyno like a mustang :D