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Re: increasing octane?
[Re: Dakota_Don]
#1381140
02/04/13 11:13 AM
02/04/13 11:13 AM
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Joined: Jan 2006
Posts: 8,162
USA
360view
Moparts resident spammer
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Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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If you are still running a catalytic converter in your exhaust, stick with Toluene to avoid poisoning it, and to stay safely on the rich side of full throttle air to fuel ratio. Since your are using AKI from the gas pumps, use a Toluene AKI of approximately 103 More AKI, RON, and MON is the table here http://en.wikipedia.org/wiki/Octane_ratingToluene can be bought at paint stores, but it has been dropped from many hardware and big box stores because chemically knowledgeable terrorists can use it to create explosives. xylene with approximate AKI of 105 is more commonly sold now but does not burn as cleanly as Toluene. If you are going to try to get increased detonation resistance from alcohol, go with a water / alcohol spray system on the intake, as it will also cool your air and increase oxygen content, and boost both effective AKI plus net horsepower. Engineering wise it is an extreme waste to mix alcohols with gasoline in the tank when those alcohols could have been mixed 50/50 with water and sprayed into the intake only at full throttle.
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Re: increasing octane?
[Re: Pacnorthcuda]
#1381141
02/04/13 12:28 PM
02/04/13 12:28 PM
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Joined: Mar 2010
Posts: 632
MD-USA
Dodgeguy101
mopar
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mopar
Joined: Mar 2010
Posts: 632
MD-USA
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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.
But not at the pump. They have separate tanks in the ground.
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Re: increasing octane?
[Re: Dakota_Don]
#1381142
02/04/13 12:37 PM
02/04/13 12:37 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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I'm running a snow performance water/meth injection kit. It takes 93 and turns it into 110 or better. They were about $259 I think they are more like $300 now. Pretty easy install. Here's the dyno sheet from a 426 Hemi. my set-up http://www.youtube.com/watch?v=JYw2q7igDGs
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Re: increasing octane?
[Re: Dodgeguy101]
#1381147
02/04/13 04:29 PM
02/04/13 04:29 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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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.
But not at the pump. They have separate tanks in the ground.
They only have 3 tanks in the ground, one for diesel fuel, one for 87 gas and one for 92 gas. The dispenser blends 60% 87 and 40% 92 to give you mid grade. Been that way forever, no one that I ever saw had a mid grade tank.
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Re: increasing octane?
[Re: Challenger 1]
#1381148
02/04/13 05:39 PM
02/04/13 05:39 PM
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Joined: Mar 2010
Posts: 632
MD-USA
Dodgeguy101
mopar
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mopar
Joined: Mar 2010
Posts: 632
MD-USA
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Quote:
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.
But not at the pump. They have separate tanks in the ground.
They only have 3 tanks in the ground, one for diesel fuel, one for 87 gas and one for 92 gas. The dispenser blends 60% 87 and 40% 92 to give you mid grade. Been that way forever, no one that I ever saw had a mid grade tank.
Then you never delivered gas to the stores I did.
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Re: increasing octane?
[Re: 72ls5fla]
#1381154
02/05/13 01:05 PM
02/05/13 01:05 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Re: gas stations
My wife was buying gas at our local cheap gas station. She tried the regular nozzle, but it didn't seem to work. Station attendant said, sorry, we're out of regular. So she tried the mid-grade, didn't seem to work. Station attendant said, sorry, mid-grade is a 50/50 mix of regular and premium. We still have premium, so you could try that.
So she put in a few dollars worth of premium and went off to find a different station to fill her tank with the regular stuff because she saves money wherever she can.
So, at least at that cheap gas station, midgrade is a mix of regular and premium.
R.
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Re: increasing octane?
[Re: dogdays]
#1381155
02/05/13 01:22 PM
02/05/13 01:22 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Re: gas stations
My wife was buying gas at our local cheap gas station. She tried the regular nozzle, but it didn't seem to work. Station attendant said, sorry, we're out of regular. So she tried the mid-grade, didn't seem to work. Station attendant said, sorry, mid-grade is a 50/50 mix of regular and premium. We still have premium, so you could try that.
So she put in a few dollars worth of premium and went off to find a different station to fill her tank with the regular stuff because she saves money wherever she can.
So, at least at that cheap gas station, midgrade is a mix of regular and premium.
R.
It is at most stations, because a third tank for mid grade is very expensive to install, maintain and pay insurance on. Plus the the 2 fuels have a different spefic gravity and the 2 products can separate because of the different gravitys of each product.
I'm sure some stations have a separate tank for mid grade, but it is not the norm because of what I said above.
I own some of the largest and newest tanks in all of Cincinnati.
I buy semi trucks loads of gas and diesel everyday, there is no mid grade sold in the Cincinnati market wholesale. it's all blended at the stations by the dispensers, the pumps are inside the tanks pushing it to the dispensers. 
Last edited by Challenger 1; 02/05/13 03:45 PM.
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