What should target A/F be with 93 Octane + Methanol?
01-01-2005, 12:45 AM
#1
TECH Fanatic
Thread Starter
What should target A/F be with 93 Octane + Methanol? When shooting a 70/30 Methanol/Water Mix and using street gas 93 Octane, what A/F should you tune the car to?
Normally I tune 93 Octane at 12.0 to 12.2:1.
TIA!
Normally I tune 93 Octane at 12.0 to 12.2:1.
TIA!
01-01-2005, 07:24 AM
#2
I normaly tune 1 point richer than my target a/f since the alky makes the a/f leaner than what the wideband is showing. The wideband is setup to read gasoline stoich which is different than alky stoich. That gets you a rough tune and then you can dyno/track to see what a/f makes the most power for your setup. I learned this from the Innovative Motorsports website who makes the LM-1 wideband that I use.
01-01-2005, 10:06 PM
#5
On another note... this comment I found on Turbomustangs bothers me... anyone care to comment? I run staight methanol by the way.
You should run no greater than a 50/50 mix of meth and water.. NO Greater..
Injecting straight meth causes you combustion charge to go lean and it will cause additional combustion heat.. That can lead to more detonation, than without it.. Below is a question from the Aquamist Water Injection website..
10. What is the maximum alcohol/ water ratio I should use?
No more than 50%, otherwise you will increase the cylinder temperature rather than reducing it. Beyond that ratio, onset of detonation is more likely. Methanol freezes at -96 deg. C, 50% mixture will stop the mixture from freezing at around -40 deg.C.
__________________
8.78 @ 162
1.41 sixty foot
no wheelie bar
Injecting straight meth causes you combustion charge to go lean and it will cause additional combustion heat.. That can lead to more detonation, than without it.. Below is a question from the Aquamist Water Injection website..
10. What is the maximum alcohol/ water ratio I should use?
No more than 50%, otherwise you will increase the cylinder temperature rather than reducing it. Beyond that ratio, onset of detonation is more likely. Methanol freezes at -96 deg. C, 50% mixture will stop the mixture from freezing at around -40 deg.C.
__________________
8.78 @ 162
1.41 sixty foot
no wheelie bar
