AFR on E20 ?

For discussing MicroSquirt (TM) configuration and tuning of fuel parameters (including idle valves, etc.).
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schmidt
MegaSquirt Newbie
Posts: 15
Joined: Thu Dec 29, 2005 11:37 am
Location: Sao Paulo, Brazil

AFR on E20 ?

Post by schmidt »

Hello Everybody,

I was thinking that the stoich AFR for gas is 14,7 (Lamda = 1 .. Duh !), but if you add 20% of ethanol on it, how would it be ?
And if you're using a lambda meter, such as LC-1, near the stoich point I think there's no problem, but as you put more fuel and makes the mixture richer(Lambda <1), can you thrust in the numbers ?
I'm asking that because we have 20% of ethanol in our gas... (regular = 92 oct ! 8) )

Hope you guys can understand my english ! :) "ME WANT FOOD!" :lol:

Cheers
Daniel
Not Ms'ed...
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2screwed
MegaSquirt Newbie
Posts: 7
Joined: Thu May 06, 2004 10:52 pm
Location: Amal, Sweden

Post by 2screwed »

Stoich AFR for E20 is 13.142

You can find more about how differnt H/C and O/C ratio in the fuel affect your WB sensor readings in this thread.
http://www.msefi.com/viewtopic.php?p=70606#70606

Lars
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