e85 AFR

IneedAZ · 10-30-2017, 09:04 AM

Just curious what AFR your tuners are trying to get on these Direct Injected motors while running e85 type gas? 12.9?

Victoryred1le · 10-30-2017, 10:53 AM

Quote:

Originally Posted by IneedAZ

Just curious what AFR your tuners are trying to get on these Direct Injected motors while running e85 type gas? 12.9?

that's what my car is at on 93. FWIW. lower pulley, 2" headers and intake.

xp3nd4bl3 · 10-31-2017, 12:07 PM

Is it realistic to think these cars can do E85 without a cam with a higher flowing fuel lobe?

NicD · 10-31-2017, 04:12 PM

Quote:

Originally Posted by IneedAZ

Just curious what AFR your tuners are trying to get on these Direct Injected motors while running e85 type gas? 12.9?

I usually shoot for around a 12.0-12.2 on a standard gas scale. Ethanol based fuels like to run a bit richer seeing as how oxygen is ~30% of it's makeup, so let it eat.

IneedAZ · 10-31-2017, 04:22 PM

Quote:

Originally Posted by NicD

I usually shoot for around a 12.0-12.2 on a standard gas scale. Ethanol based fuels like to run a bit richer seeing as how oxygen is ~30% of it's makeup, so let it eat.

Even on DI motors? I was led to believe they like it leaner.

Victoryred1le · 11-01-2017, 12:06 PM

Quote:

Originally Posted by IneedAZ

Even on DI motors? I was led to believe they like it leaner.

They do. Even my 991 Porsche from the factory was high 12's and then with Cobb software was low 13's also a DFI car.

NicD · 11-01-2017, 01:52 PM

Quote:

Originally Posted by IneedAZ

Even on DI motors? I was led to believe they like it leaner.

They do, if it wasn't a DI motor I would be running low 11s on ethanol. Leaning out ethanol is unnecessary and you can actually give up some power and torque by doing that. Remember E85 is ~30% oxygen and getting more in the chamber will not hurt power at all.

IneedAZ · 11-01-2017, 02:21 PM

Quote:

Originally Posted by NicD

They do, if it wasn't a DI motor I would be running low 11s on ethanol. Leaning out ethanol is unnecessary and you can actually give up some power and torque by doing that. Remember E85 is ~30% oxygen and getting more in the chamber will not hurt power at all.

Do u follow the same rule if NA vs Supercharged?

NicD · 11-01-2017, 04:22 PM

Quote:

Originally Posted by IneedAZ

Do u follow the same rule if NA vs Supercharged?

Generally speaking yes same rule but obviously not the same numbers.

10-30-2017, 09:04 AM	#1
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,110 View My Garage	e85 AFR Just curious what AFR your tuners are trying to get on these Direct Injected motors while running e85 type gas? 12.9? __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

10-31-2017, 12:07 PM	#3
xp3nd4bl3 Drives: 2017 HBM ZL1 M6 Join Date: Jul 2017 Location: Orange County, CA Posts: 40	Is it realistic to think these cars can do E85 without a cam with a higher flowing fuel lobe?

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