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Re: increasing octane?
[Re: Dakota_Don]
#1381121
02/03/13 09:40 PM
02/03/13 09:40 PM
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Joined: Jan 2003
Posts: 1,255
Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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If you have a MP Engines book around there should be a good section on how little "octane boosters" actually do. I've always heard gas stations get their midgrade gas, by pulling from the lower and higher grade gas tanks. Don't know that for sure, but if so you could probably find a place that sells high octane race gas and buy a couple of gallons to mix in with what you have.
"The happiness of your life depends upon the quality of
your thoughts" ~ Roman Emperor Marcus Aurelius
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Re: increasing octane?
[Re: Michael Ecks]
#1381124
02/03/13 10:06 PM
02/03/13 10:06 PM
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Joined: Jan 2003
Posts: 27,451
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,451
So Cal
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Quote:
... I've always heard gas stations get their midgrade gas, by pulling from the lower and higher grade gas tanks. Don't know that for sure, but if so you could probably find a place that sells high octane race gas and buy a couple of gallons to mix in with what you have.
That sounds like a big 'wives tale' story.
Gas is very regulated and monitored. No way of blending high and low octane at the pump.
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Re: increasing octane?
[Re: autoxcuda]
#1381126
02/03/13 10:12 PM
02/03/13 10:12 PM
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Joined: Nov 2007
Posts: 21,813
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,813
Kirkland, Washington
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Quote:
Quote:
... I've always heard gas stations get their midgrade gas, by pulling from the lower and higher grade gas tanks. Don't know that for sure, but if so you could probably find a place that sells high octane race gas and buy a couple of gallons to mix in with what you have.
That sounds like a big 'wives tale' story.
Gas is very regulated and monitored. No way of blending high and low octane at the pump.
Incorrect. Mixing the two is exactly how mid-grade is concocted.
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Re: increasing octane?
[Re: Dakota_Don]
#1381127
02/03/13 10:13 PM
02/03/13 10:13 PM
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Joined: Jan 2003
Posts: 27,451
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,451
So Cal
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Quote:
and this http://www.ehow.com/how_7990457_boost-octane-alcohol.html
Careful with that Ehow stuff.
Those instructions are sort of convoluted. Sound chopped up from some other info by a writer. At least, that article says to add a drying additive IF you use alcohol. Well alcohol IS a drying additive. 
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Re: increasing octane?
[Re: Dakota_Don]
#1381128
02/03/13 10:24 PM
02/03/13 10:24 PM
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Joined: Jan 2007
Posts: 7,664
IN
ahy
master
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master
Joined: Jan 2007
Posts: 7,664
IN
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Quote:
Hello, if i am running lets say 93 octane, how could i raise octane to 95 or 97? Moroso octane boost? E-85? Other? and if have 5 gal of 93 how much would i add?
Mixing in E85 will increase octane but reduce energy value. If you are running a carb, that means bigger jets to put more fuel in. Without the bigger jets, it will be lean and may make detonation worse. Once the tuneup was dialed in for a certain mix, you would have to be consistent from tank to tank which is hard.
Mixing race gas is a proven way to boost octane. Or convert to E85 with a dedicated alcohol carb and tune.
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Re: increasing octane?
[Re: Pacnorthcuda]
#1381129
02/03/13 10:25 PM
02/03/13 10:25 PM
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Joined: Jan 2003
Posts: 27,451
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,451
So Cal
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Quote:
Quote:
Quote:
... I've always heard gas stations get their midgrade gas, by pulling from the lower and higher grade gas tanks. Don't know that for sure, but if so you could probably find a place that sells high octane race gas and buy a couple of gallons to mix in with what you have.
That sounds like a big 'wives tale' story.
Gas is very regulated and monitored. No way of blending high and low octane at the pump.
Incorrect. Mixing the two is exactly how mid-grade is concocted.
Are you saying it's concocted/blended right at/in the gas pump at the gas station itself?
Or before it's delivered to the station?
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Re: increasing octane?
[Re: autoxcuda]
#1381130
02/03/13 10:30 PM
02/03/13 10:30 PM
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Joined: Nov 2007
Posts: 21,813
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,813
Kirkland, Washington
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Quote:
Quote:
Quote:
Quote:
... I've always heard gas stations get their midgrade gas, by pulling from the lower and higher grade gas tanks. Don't know that for sure, but if so you could probably find a place that sells high octane race gas and buy a couple of gallons to mix in with what you have.
That sounds like a big 'wives tale' story.
Gas is very regulated and monitored. No way of blending high and low octane at the pump.
Incorrect. Mixing the two is exactly how mid-grade is concocted.
Are you saying it's concocted/blended right at/in the gas pump at the gas station itself?
Or before it's delivered to the station?
The pump blends it.
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Re: increasing octane?
[Re: autoxcuda]
#1381132
02/03/13 10:38 PM
02/03/13 10:38 PM
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Joined: Jan 2003
Posts: 1,255
Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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Quote:
Quote:
and this http://www.ehow.com/how_7990457_boost-octane-alcohol.html
Careful with that Ehow stuff.
Those instructions are sort of convoluted. Sound chopped up from some other info by a writer. At least, that article says to add a drying additive IF you use alcohol. Well alcohol IS a drying additive.
Checked out that article. And it looks iffy to me. According to my MP book, the three types of boosters contain either Alcohol (methanol), Aromatic Hyrdocarbons (Toluene), or Metallics (Lead of Manganese) with the first two being the least effective. If you can find a booster that actually contains tetraethyl-lead anymore (my book is quite old) you could go up 1.5 to 2 octane points. .75 points with the other two.
And I'm pretty sure isopropyl alcohol does nothing at all when mixed with gasoline. Tried it once in my younger days when I was having a pinging problem and it didn't help at all.
If no one around you sells race gas, call your airport and tell them you are working on an old cesna engine and see if you can buy aviation gas a gas can at a time. Heard of it being done back in the day, but not sure what fuel tax/legalities this would involve.
Last edited by Michael Ecks; 02/03/13 10:48 PM.
"The happiness of your life depends upon the quality of
your thoughts" ~ Roman Emperor Marcus Aurelius
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Re: increasing octane?
[Re: Dakota_Don]
#1381135
02/04/13 12:41 AM
02/04/13 12:41 AM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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Re: increasing octane?
[Re: autoxcuda]
#1381136
02/04/13 12:43 AM
02/04/13 12:43 AM
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Joined: Feb 2003
Posts: 8,020
Pangaea
B5 Bee
master
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master
Joined: Feb 2003
Posts: 8,020
Pangaea
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Quote:
Quote:
... I've always heard gas stations get their midgrade gas, by pulling from the lower and higher grade gas tanks. Don't know that for sure, but if so you could probably find a place that sells high octane race gas and buy a couple of gallons to mix in with what you have.
That sounds like a big 'wives tale' story.
Gas is very regulated and monitored. No way of blending high and low octane at the pump.
That's how Sunoco stations did it back it the days of Sunoco 260. You had a 8 choices of octane from 190 to 260 just by setting the pumps handles.
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