15% Ethanol and 991s?
#16
Cash for Clunkers Mega Edition
Ethanol is a nightmare for the carbs on my old Honda bike - gunk everywhere and water in the bowls after only 3-4 weeks sitting. I sold my dream Ducati because ethanol expands their plastic fuel tanks, which I think will eventually wreck resale values even on bikes without symptoms. 15% may not be a big problem for newish cars that run through a tank weekly. But for those of us who put less than 10k miles per year on the car, I hope the supply of ethanol free gas becomes a lot more widespread.
#17
Rennlist Member
Ethanol is a nightmare for the carbs on my old Honda bike - gunk everywhere and water in the bowls after only 3-4 weeks sitting. I sold my dream Ducati because ethanol expands their plastic fuel tanks, which I think will eventually wreck resale values even on bikes without symptoms. 15% may not be a big problem for newish cars that run through a tank weekly. But for those of us who put less than 10k miles per year on the car, I hope the supply of ethanol free gas becomes a lot more widespread.
Ethanol is a mess. But it "sounds good."
My best solution may be going to Sears Point for gas for that car whenever possible, but that gets tricky if I want to keep the tank full because the car sits a lot. The extra 30-minute trip ain't good for the environment, either. Perhaps it's time to convert more of these corn farms to something else....
#18
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Join Date: Jul 2001
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You can search for ethanol free gas online but most is 89 octane: https://www.pure-gas.org/index.jsp
#19
Forget about being GREEN for a moment. (I have no idea whether it helps or hurts the environment.) Just focus on the Stoichiometric values. Normal Gas is 14.7:1 E85 is 9.6:1
Which means to hit Lambda1 You need a lot more of E85 poured down the neck. However, if you are tuned for it. you get a bucket load of power. : )
Which means to hit Lambda1 You need a lot more of E85 poured down the neck. However, if you are tuned for it. you get a bucket load of power. : )
#20
Rennlist Member
Arbitrarily changing the nation's fuel supply in a manner that has real costs for its consumers—and automakers who have to cover warranty repairs—is a recipe for disaster.
#21
Advanced
Hate to throw some science and experience in here with the hatred but based on Brake Specific Fuel Consumption E10 requires scheduling around 5.2-7.5% more fuel to make the same power and E15 requires around 7.8-10.3% additional fuel over straight gas. Most of the OEM computers I've dealt with over the years have between 12 to 20% authority (+/- from baseline - as in 24-40% total authority) to trim fuel delivery in closed loop operation and (easily) the fuel system overhead to match a 120% request. I would be quite surprised if a 2.6-2.8% additional requirement would be the straw that broke the camels back in a modern system with wideband O2's designed for E10.
But yeah...DOWN WITH ETHANOL!!!
But yeah...DOWN WITH ETHANOL!!!
#22
Racer
I have replaced rubber fuel lines in my 1960 Austin-Healey 3000, 1962 VW Convertible and twice on my 1974 911 due to fuel leaking through the rubber fuel lines. They ran fine for the 40-55 years I have owned the cars . . . until ethanol showed up in California a decade or so back.
#23
Hate to throw some science and experience in here with the hatred but based on Brake Specific Fuel Consumption E10 requires scheduling around 5.2-7.5% more fuel to make the same power and E15 requires around 7.8-10.3% additional fuel over straight gas. Most of the OEM computers I've dealt with over the years have between 12 to 20% authority (+/- from baseline - as in 24-40% total authority) to trim fuel delivery in closed loop operation and (easily) the fuel system overhead to match a 120% request. I would be quite surprised if a 2.6-2.8% additional requirement would be the straw that broke the camels back in a modern system with wideband O2's designed for E10.
But yeah...DOWN WITH ETHANOL!!!
But yeah...DOWN WITH ETHANOL!!!
I can see its no good for people who don't want to tune. But for people who do, its very large smiles.
#25
Rennlist Member
Seems to me there might be an effective lawsuit to block such legislation, as the gov't is proposing something that not only isn't good for the environment (ethanol has been shown to be less than it promises to be, and destructive even at 5-10%) but requires something that violates the mechanical needs of some rather expensive consumer products: cars. As in, all cars, which tend to be a significant asset to most Americans in both % terms as well as utility whether we're talking about a 991 or a Civic.
Hate to throw some science and experience in here with the hatred but based on Brake Specific Fuel Consumption E10 requires scheduling around 5.2-7.5% more fuel to make the same power and E15 requires around 7.8-10.3% additional fuel over straight gas. Most of the OEM computers I've dealt with over the years have between 12 to 20% authority (+/- from baseline - as in 24-40% total authority) to trim fuel delivery in closed loop operation and (easily) the fuel system overhead to match a 120% request. I would be quite surprised if a 2.6-2.8% additional requirement would be the straw that broke the camels back in a modern system with wideband O2's designed for E10.
But yeah...DOWN WITH ETHANOL!!!
But yeah...DOWN WITH ETHANOL!!!
#26
You can search for ethanol free gas online but most is 89 octane: https://www.pure-gas.org/index.jsp
However, given the common interest of the environmental and gasoline refining lobbies in this matter, I personally wouldn't bet on E15 being a nation-wide mandate.
#27
110% because Iowa holds the first presidential primary (well, caucus) in the country. You win Iowa, you have momentum into New Hampshire, other states, then the nomination, then the presidency. Candidates say they'll do away with ethanol, and then they spend the two years before running for president visiting every corn farm and county fair in Iowa.
#28
Hate to throw some science and experience in here with the hatred but based on Brake Specific Fuel Consumption E10 requires scheduling around 5.2-7.5% more fuel to make the same power and E15 requires around 7.8-10.3% additional fuel over straight gas. Most of the OEM computers I've dealt with over the years have between 12 to 20% authority (+/- from baseline - as in 24-40% total authority) to trim fuel delivery in closed loop operation and (easily) the fuel system overhead to match a 120% request. I would be quite surprised if a 2.6-2.8% additional requirement would be the straw that broke the camels back in a modern system with wideband O2's designed for E10.
But yeah...DOWN WITH ETHANOL!!!
But yeah...DOWN WITH ETHANOL!!!
#29
Rennlist Member
Lobbying for lower speed limits. Maybe think about that when it's time to renew.
While I've gone on and off of AAA for roadside (it's kinda hard to beat), I've never given AAA a dime for car insurance after my high-school experience with an AAAer who rear-ended me. "Good news," said the agent with bright green eyes and brighter red hair. "We're going to total your car for you!" Amount offered? $3k. Even back then, the car was worth more than that (albeit not that much). It's still on the road today, and man am I thankful to Dick Cottrell, who schooled me on dealing with insurance companies in general and AAA in particular.
#30
You can search for ethanol free gas online but most is 89 octane: https://www.pure-gas.org/index.jsp