E85 Users

[blck10th]

I have a friend who has a SB Chevy 434ci. about 11.5 to 1 compression. carb car.
He wants to run it on E85.

Does anyone know what the air fuel ratio should be about. he is putting a wide ban on it.

thanks guys

BOB please chime in. I know you have that E85 setup on the blower car

Click to read more...

 

[Roy V]

Fuel ........................ AFRst ........ FARst ....... Equivalence Ratio ... Lambda
Gas stoich ................ 14.7 .......... 0.068 ................ 1 ................... 1
Gas max power rich .... 12.5 .......... 0.08 ................. 1.176 .............. 0.8503
Gas max power lean .... 13.23 ........ 0.0755 .............. 1.111 ............. 0.900
E85 stoich .................. 9.765 ....... 0.10235 ............ 1 ................... 1
E85 max power rich ...... 6.975 ....... 0.1434 .............. 1.40 ............... 0.7143
E85 max power lean ..... 8.4687 ...... 0.118 ............... 1.153 .............. 0.8673
E100 stoich ................ 9.0078 ...... 0.111 ............... 1 .................... 1
E100 max power rich .... 6.429 ........ 0.155 .............. 1.4 .................. 0.714
E100 max power lean .... 7.8 .... ...... 0.128 .............. 1.15 ................ 0.870


Don't know about a carb application but for FI, you need at least 30% more injector. What type of fuel pump is he running?

Here's a good link on E-85:

http://www.ls1tech.com/forums/fueling-injection/602091-how-run-your-ls1-e85.html

They started selling E-85 right down the street from me - $2.03/gallon as of yesterday (11/15)

This shit is 105 octane by the way!

 

[Bob_Kurgan]

he will still shoot for the same a/f but will require a ton more fuel (upwards of 30%) to achieve the same a/f..... if he is an N/A car, tell him to target around 12.5..

 

[Maniak]

95trippleblackvert runs this stuff, maybe he will chime in as well

 

[Roy V]

Bob, 12.5 A/F??

 

[Bob_Kurgan]

Bob, 12.5 A/F??

yes, 99% of widebands display in GAS a/f..... the conversion is done..

If you have a wideband thats selectable and can display a/f in Ethanol, then its different... dont get confused.

 

[batman]

yes, 99% of widebands display in GAS a/f..... the conversion is done..

If you have a wideband thats selectable and can display a/f in Ethanol, then its different... dont get confused.

lol

 

[Roy V]

yes, 99% of widebands display in GAS a/f..... the conversion is done..

If you have a wideband thats selectable and can display a/f in Ethanol, then its different... dont get confused.

My LM-1 was converted to E-85 reading - Now I understand.

Not confused.

Roy

 

[Bob_Kurgan]

My LM-1 was converted to E-85 reading - Now I understand.

Roy

actually, the EASIEST thing to do is to display in lambda... .850 lambda is around 12.5 a/f GAS... then, you can do your division or multiplication to see exactly how much you need to richen or lean your mixture.. if your lambda display .870, then you just add 2% to your fuel curve.

 

[Bob_Kurgan]

My LM-1 was converted to E-85 reading - Now I understand.

Not confused.

Roy

was not meant in a demeaning way by any means.. sorry if it came across that way.

 

[Bob_Kurgan]

Fuel ........................ AFRst ........ FARst ....... Equivalence Ratio ... Lambda
Gas stoich ................ 14.7 .......... 0.068 ................ 1 ................... 1
Gas max power rich .... 12.5 .......... 0.08 ................. 1.176 .............. 0.8503
Gas max power lean .... 13.23 ........ 0.0755 .............. 1.111 ............. 0.900
E85 stoich .................. 9.765 ....... 0.10235 ............ 1 ................... 1
E85 max power rich ...... 6.975 ....... 0.1434 .............. 1.40 ............... 0.7143
E85 max power lean ..... 8.4687 ...... 0.118 ............... 1.153 .............. 0.8673
E100 stoich ................ 9.0078 ...... 0.111 ............... 1 .................... 1
E100 max power rich .... 6.429 ........ 0.155 .............. 1.4 .................. 0.714
E100 max power lean .... 7.8 .... ...... 0.128 .............. 1.15 ................ 0.870


Don't know about a carb application but for FI, you need at least 30% more injector. What type of fuel pump is he running?

Here's a good link on E-85:

http://www.ls1tech.com/forums/fueling-injection/602091-how-run-your-ls1-e85.html

They started selling E-85 right down the street from me - $2.03/gallon as of yesterday (11/15)

This shit is 105 octane by the way!

if you skip to the 2nd page around post #31+, it will explain what I am talking about how most widebands display gas a/f

 

[blck10th]

he will still shoot for the same a/f but will require a ton more fuel (upwards of 30%) to achieve the same a/f..... if he is an N/A car, tell him to target around 12.5..

yes it is N/A motor.

can you PM me a price on the Aem gauge?

 

[95trippleblackconv]

If you left your meter set for gas tune it to 12.5/1 or .85 Lambda (that's what I do just a lower A/F) If you went into the WB settings and set it for E85 tune it to 8.3/1 or .85 lambda. Like bob said using lambda is easier because it will read 1 for stoich and .85 for max power regardless of how its set or fuel used

Their might be some info on carb tuning here http://www.e85performance.net/forums/

 

[blck10th]

If you left your meter set for gas tune it to 12.5/1 or .85 Lambda (that's what I do just a lower A/F) If you went into the WB settings and set it for E85 tune it to 8.3/1 or .85 lambda. Like bob said using lambda is easier because it will read 1 for stoich and .85 for max power regardless of how its set or fuel used

Their might be some info on carb tuning here http://www.e85performance.net/forums/

Thanks