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Wideband

Complaints...

1) Not Mine.
2) Not Mine
17) Not mine yet

347) You suck

Other than that...don't hit any deer tuning.
 


I was logging while i almost hit a deer.. looked over to turn of log going like 100+ its scary..

So If im going e85 I heard i need my AFR lower than stock.. Someone said in the 8 range.. Is this true?
 
Yeah, me and 01GPGT had a discussion about this the other day.

The best thing to do is just read lambda from your wideband instead of AFR unless you're able to change how it reads.

E85 in standard engines - Wikipedia, the free encyclopedia

You want it to read stoich as 9.765 instead of 14.7.

So, for E85 (summer blend), the required air fuel ratio can be estimated as:
0.85 x 9.0078 + 0.15 x 14.64 = 9.8526

Likewise, for E85 (winter blend), the required air fuel ratio can be estimated as:
0.70 x 9.0078 + 0.30 x 14.64 = 10.6975, which is closer to the gasoline air fuel ratio.
Click to expand...
 
AFR will still read the same, regardless of fuel because its still converting AFR from the stoich. the gauge is set for 14.7 to be stoich and that's it.
 


Bio248 said:
AFR will still read the same, regardless of fuel because its still converting AFR from the stoich. the gauge is set for 14.7 to be stoich and that's it.
Click to expand...

To further elaborate - The "wideband" has three parts: 1) Sensor, 2) Controller, and 3) Gauge. (Sometimes the controller and gauge are one physical part).

The sensor always reads lambda as a voltage range representing the mix as 1.0 for stoich. The controller translates this voltage value to AFR for one or more fluid types - i.e. gas = 14.7. When you run E85, the sensor still reads a lambda value and the controller will still output this as a gas relevant AFR unless your controller/gauge has the ability to switch to other fluid AFR's. For instance, the PLX has this ability, and can output the correct E85 AFR (9.7).

To avoid confusion, most people running E85 still talk about E85 in gas terms, so they will say the AFR is 11.5 at WOT, even though the real AFR is in the 7's. I display lambda on my gauge now, and have gotten used to the idea that .80 is what I want to run at WOT, and 1.0-1.05 is where I want to cruise.
 
Yes, you are changing the flow rate on the injectors so that you don't have to convert all of th pcms afr from gas to e85. If you read in gas, wot on e85 should be in the 11.0 to 11.5 range. Although e85 has a more flexible range of afr before it knocks, so most times you won't even get the car to knock at all unless your really really lean...
 


AFX is a decent wideband, I like the big red readout numbers. I hear it is one of the more accurate ones out there as well.

I like my LC1's but they are more for the "mad scientist" I would say, the AFX is pretty user friendly.

E85 reads just find on a gas calibration. Dont be afraid to run it in the low 12s range with that m90.
 
darkhorizon said:
AFX is a decent wideband, I like the big red readout numbers. I hear it is one of the more accurate ones out there as well.

I like my LC1's but they are more for the "mad scientist" I would say, the AFX is pretty user friendly.

E85 reads just find on a gas calibration. Dont be afraid to run it in the low 12s range with that m90.
Click to expand...

My A/F ratio in the low 12s? with e85?
 


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