03-14-2021, 02:04 PM | #1 |
Drives: 2014 Camaro SS 1Le Join Date: Feb 2016
Location: IL
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Ethanol content and tuning.
Car was tuned with alcohol content between 50-55%. If I run straight e85, which typically reads 70-75%, what will happen?
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2014 SS 1LE Money Pit/ Forged 402
CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq Last edited by RupertPupkin; 03-15-2021 at 08:33 AM. |
03-14-2021, 03:44 PM | #2 |
Tri-County Camaro SWFL
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do you mean ethanol? E85 is 85% ethanol.
Typically your tune has to be tweaked if you plan on running straight E
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03-14-2021, 04:03 PM | #3 |
Drives: 2014 Camaro SS 1Le Join Date: Feb 2016
Location: IL
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Yup. Runing flex fuel.
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2014 SS 1LE Money Pit/ Forged 402
CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq |
03-14-2021, 04:32 PM | #4 |
Served USN - Atomic Chimp
Drives: 13 Camaro LSX434 TT M6, 21 ZLE A10 Join Date: Jul 2012
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Depends on how it was tuned... ask you tuner.
By the fact that it's more alcohol, then you'd be using more fuel. "They" say you usually use 30% more volume of fuel E85 over 93/91. Possibility: the tune was correctly setup in all the alcohol tables to will add slightly more timing in the higher RPM/load areas. You will also need slightly more fueling but it looks like your fuel system should be able to handle that. I've been told by several tuners that anything over 40% alcohol starts to run about the same, and I interpreted that as hitting diminishing returns. I haven't experimented enough to know any different yet. If the tune was set up correctly, then you'd notice a difference driving the car with straight 93/91 octane compared to having a tank with +50% alcohol in it, by the additional timing on a WOT pull; but likely not noticeable between 50% and 75% alcohol difference. I've attached a couple the alcohol tables that adjust timing for alcohol. The smaller table is the percent of timing on the larger table that is added/subtracted to the main timing table. These are my chosen numbers as my local station runs 70% max. Sometimes I fill up in a town on the way to the strip and it has been 85% at time. I run with whatever I have in the tank as I am tuned for the whole spectrum of alcohol in the fuel. Also, you have an octane and a alcohol power enrichment tables. The more alcohol, the more swayed the PE will toward that ratio (if the tuner used different PE ratios).
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03-14-2021, 06:57 PM | #5 | |
Drives: 2014 Camaro SS 1Le Join Date: Feb 2016
Location: IL
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Quote:
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2014 SS 1LE Money Pit/ Forged 402
CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq |
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03-23-2021, 09:16 PM | #6 | |
Drives: 2010 Camaro SS Join Date: Jan 2019
Location: Saint Charles MO
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Check out Goat Rope Garage
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03-23-2021, 09:25 PM | #7 |
Drives: 2014 Camaro SS 1Le Join Date: Feb 2016
Location: IL
Posts: 1,579
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I actually watched that vid a couple of days ago.
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2014 SS 1LE Money Pit/ Forged 402
CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq |
03-24-2021, 01:00 AM | #8 |
GrINned & JUICEd
Drives: 15STI, 10Expy, 10 2SS/RS M6, 47KB1 Join Date: Nov 2009
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So the tuner did actually want you to show up with "E85" in the tank? And not tune on 93 first, then add "E85" to tune on it? From one of your previous threads.
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03-24-2021, 06:47 AM | #9 |
Drives: 2014 Camaro SS 1Le Join Date: Feb 2016
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Wanted a premixed blend already. I showed up with 1/4 if not less of 93 and 10gal of e85
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2014 SS 1LE Money Pit/ Forged 402
CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq |
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