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In Appreciation of John Hinckley -
Re: Gasoline Quality
never happen Kurt...we just have to adjust and get used to the future and more corn in our gas, run race gas or find a station that has no ethanol in it...I think puregas.org tells this. I run a 50/50 mix of unleaded race gas and conoco which locally has no ethanol or so they say.
anyone know of a kit to test for ethanol/alcohol in gas?????Michael
70 Mulsanne Blue LT-1
03 Electron Blue Z06Comment
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Re: Gasoline Quality
In Illinois (at least the Norther part of the state) the labels on the pumps say: "MAY contain up to 10% Ethanol" That implies it could be less, but I doubt it.
Kent Moore made a test kit to find how much alcohol is in the gas, but when available I am sure it cost a whole lot more than the product Clem linked to.
Here you go after a quick Google search:
TerryComment
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Re: Gasoline Quality
My Corvette is a 300hp car and it's tuned with the stock #65 (P) and #76 (S) jets, all stock 3810 Holley, no mods to the idle feed restriction. The exhaust crossover under the carburetor is blocked with plugs and heat riser is operating normal, all gaskets are correct.
I have read the ethonal will increase octane and lean the fuel curve because of the 3.5% added oxygen content. On this engine the problem seems to be at the accelerator pump as that small bit of gas is closest to the hot plenum and the problem did not surface until good and hot after driving for some time. As I stated above, after getting home that day I observed the very small spit from the accelerator pump operating it manually but everything else looking inside the throttle bore seemed fine.
Sometimes when driving this car I will not even downshift going around a traffic circle etc. because it's so smooth, I just let it pudder back up to speed in forth gear, so the hesitation has to be the acc pump as the carburetor is operating on the idle circuit at this throttle position. When the car is first driven all is fine until after an hour or so, I am convinced it's something different with the gasoline.Comment
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Re: Gasoline Quality
It's begining to appear that there are as many myths and misinformation about modern gasoline as modern motor oil. As Joe stated, the current EPA-approved maximum ethanol content is 10 percent by volume, which yields about 2.7 percent oxygen by mass.
Most refinery gasoline is now blended to achieve the requisite octane rating with 10 percent ethanol. (Ethanol is about 110 RON, so it will raise the octane rating of the blend.)
Ethanol costs more per BTU and volume than gasoline, so there is no economic incentive for blenders to "cheat" on ethanol content by adding more than 10 percent.
Ethanol reduces the mid-range boiling temperature of the blend, so it can cause fuel percolation and vapor lock on vintage cars that don't have pressurized fuel systems. Percolation can lead to hard hot starting and misfire in hot weather low speed driving due to the mixture being too rich to ignite.
Also, many heat riser valves can be partially closed at low exhaust flow like idle and low speed driving, so the first thing EVERYONE should do is WIRE IT FULL OPEN.
Until you download, read, and THOROUGHLY UNDERSTAND the following document, you don't know jack sh.. about modern gasoline.
www.chevronwithtechron.com/products/documents/69083_MotorGas_Tech_Review.pdf
Get yourselves educated. Then the next time some guy starts spouting all the myths, give him an education!
DukeLast edited by Duke W.; September 19, 2012, 10:17 AM.Comment
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Re: Gasoline Quality
I will have to agree about the misinformation part of Duke's post as the oil kings DO misinform us to their profit.
In most cases it is what they leave out of their articles, the things that they DON'T print.
The big companies can shove anything down our throats, its their review and their gas.
The negatives are not published or cleverly left out.
I have seen independent reviews on products that were swayed by the manufacturer.
Burger King will only tell you the positives in their reviews about their food.
A major oil company can print what they want us to believe and forget to print a few profitable things.
I watched a vidio years ago made by Shell oil about their oil, they said their oils were tested to nexceed ALL engine requirements.
There were a lot of holes in the vidio, their temp test was 250 ? Oil under the piston far exceeds that temp and is also higher thru the crank but they made it sound good.
No disrespect to any one BUT oil companies are politicians to, you can't believe all you read, it's what they don't say that causes some problems.
DOMComment
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Re: Gasoline Quality
The ozone season is between June and September, and was begun back in the days when MTBE was added to gasloine during this period (maybe the early 80's?). It depends on your State Implementation Plan and whether or not you have any non attainment areas, so this was not consistent throughout the U.S. Until a few years ago, ethanol was added during this period, but under president Obama's mandate for energy independence, it has been added year around for the past several years. Today, there are the two different reasons and sets of rules for ethanol in gasoline, the EPA and Obama's energy plan.
One other point of misconception that keeps popping up in these threads, ethanol is added at the disrtibution point and is not "blended" into the gasoline so every gallon is exactly 10%. 10% is only the maximum, it is probably less in most cases.Comment
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Re: Gasoline Quality
There are a number of stations around here (Central Ms )that have ethanol free gas. One Valero station in particular near me has it. Those pumps are always twice as busy as any of the other 10 or 20. This is 90 octane rated gas. Some other independent staions (Pure for one) has non ethanol gas in three grades. There are some websites that I have looked at that show where most every station is that has ethanol free gas.
MikeComment
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Re: Gasoline Quality
As previously stated, MTBE was banned several years ago, and circa 2006 Congress passed an act that has increasing requirements over the years for oxygenates from "renewable resources", and ethanol is the only game in town. Recall that at this time Republicans controlled both houses of Congress and the White House. So much for Republicans!
Right now along the Southern California coastal areas regular unleaded is about four bucks a gallon. Of this about 65 cents is federal and state excise tax and state/local sales tax. Further, I estimate that the restricted recipe for California's "reformulated gasoline", which includes 10 percent ethanol adds about another half a buck a gallon to what the refineries could produce using the most cost effective components to achieve current octane, detergency, oxidation/gum formation resistance, storage life, and other technical specifications.
The California Air Resources Board claims that RFG reduces emissions by up to 20 percent, but industry technical professionals I have talked to say that's pure BS for any car with an O2 sensor and three way catalyst, which includes nearly all cars built in the last 30 years!
For sure the reduced mid range boiling characterisitics of all E10 blends dramatically increases evaporative emissions from vintage cars with carburetors or Rochester FI, not to mention the driveablility issues.
I've never been a subscriber to the "big oil conspiracy". Lubricant standards are established by the API, which includes the auto manufacturers and oil industry. The auto manufactures drive the standards within the technology and cost limitations that exist in the refining industry.
Gasoline standards are primarily set by government with little or no cost impact analysis, and the refining industry has had to invest about $100 billion in the last 10-15 years to meet all these government imposed regulations.
I'll trust oil industry technical professionals versus govenment bureaucrats, most of whom are tree hugging Luddites or technical morons, any day of the week. I know who states the facts versus who spins it all for political reasons.
I just shake my head evertime there is a big outcry over "excess" oil industry profits. Big oil is primarily about crude oil exploration and extraction, so when crude prices are high, which are driven by free market supply and demand, they make a good profit - about 10 cents on each sales dollar. So when you hear that ExxonMobil made a whopping $10 billion in the last quarter, you'll have to look up their revenue because the drive-by media will never tell you that was $10 billion on $100 billion of revenue, and, further, that they paid out $3 billion in dividends and will invest the remaining $7 billion in exploration and other capital expenditures, many of which are driven by government regulations.
Despite the ridiculous compensation packages that many of their senior executives receive, it's just a drop in the bucket that only the shareholders need be concerned about.
And don't forget that there have been several congressional investigations over "price fixing" by big oil in the last couple of decades - usually when Democrats are in power - but none ever found a shred of credible evidence.
Apple Computer makes about 40 cents on the sales dollar, but nobody ever bitches about that. In fact they line up overnight to be the first to pay an inflated price for some new gadget with a bunch of bells and whistles that most will never use. If all the iphones and ipads and i-whatever stopped working tomorrow, most people could get by with no more than a little inconvenience. If gasoline stopped flowing tomorrow, we'd all be in deep yogurt!
If you want to get an appreciation for the RISK inherent in big oil, and how they serve us as consumers, pick up a copy of Steve Coll's, Private Empire: ExxonMoblie and American Power published earlier this year although take the last chapter where he gets into "global warming" with a grain of salt.
You can probably find a copy in your local library. It gave me a new appreciation for the risks that big oil takes to keep the oil flowing, and I can say for sure that I have more trust and respect for "big oil" than I do for "big government".
DukeComment
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Re: Gasoline Quality
clem-----
This is an unusual one. There were actually several of these shields used for 1970 with NA-9 with Holley carbs. Primarily, I think the difference related to the configuration of the shield to mate with the various intake manifolds used for different engines. The only application I can find for the one you have posted was 1970 with LS-7 and NA-9. Of course, none of those were ever made but quite a few LS-7 components nevertheless got into the SERVICE parts system and this is one of them.In Appreciation of John HinckleyComment
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