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Re: avation fuel
Aviation fuel is HIGHLY refined! Try this sometime, take a sample of 100LL avgas and a sample of your best premium pump gas, dip your left hand /finger in the 100LL and the right in the pump gas. Guaranteed your left hand will have zero fuel smell residue, while your right will smell like well...............you were out in the garage working on the fuel system again. Now with the evaporation process of the fuel that takes place completely in the fuel bowl in between drives for most of us comes the residue. That's where the rubber meets the road with ethanol gas, It runs fine, but more unwanted residue which gums things up. If you don't drive often, you know what I am saying. Speaking from experience as a Commercial Pilot and old Corvette fan. That being said I run pump gas in my carbs and I also clean them more frequently. If I was running a fuelie, I would ONLY be using100LL. John D has already told you that though. DanLast edited by Dan B.; November 28, 2015, 08:10 PM.Comment
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Re: avation fuel
I can understand with a fuelie the advantage, but can someone take a guess as to why my carb sprung all the leaks. It was just rebuilt this summer with no problems untill the avgas . I was talking to another member today and he said that maybe the ethanol swells the rubber seals in the carb and with the avgas they shrink then letting it leak. Just a stab at itComment
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Re: avation fuel
IF the E10 fuels of today did cause the rubber seals to swell, I know of nothing that would cause them to shrink. I know they wouldn't re-swell either.
I have been using E10 in my 67 327-350hp since 1985 and have had ZERO problems with it.
DonThe light at the end of the tunnel has been turned off.Comment
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Re: avation fuel
I have used AV gas for years in my 67 L79 with no adverse effect. I had been told by a local corvette shop owner that AV gas had no impurities and that since I didn't drive my car often I shouldn't have issues with varnish and sediment build up in the fuel system.
NealComment
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Re: avation fuel
There is no "cause and effect" between your ethanol use and leaking carb gaskets so I doubt anybody will speculate - this is akin to synthetic oil making gaskets leak when first used in an old car. I suspect some unrelated issue caused your problem (perhaps simple carb flooding) and you drew an incorrect conclusion. I run ethanol-laced gas in a boat, two jet skis, a dual quad '61, my split window, a weed eater and a pressure washer -- all carbureted (and all my modern cars too) in the high humidity of Central Florida for decades. My boats and skis sit for months unused.
NO problems, nada, zilch...Comment
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Re: avation fuel
All I know is avgas is expensive - over $6/gal here in FL, even now. Since I'm an ethanol skeptic, I buy non-ethanol pump gas for half that and add TEL as needed for both octane boost and lead. Plus saves long trips to the airport.
BruceComment
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Re: avation fuel
I assume that in 1980 I had a good reason from removing the "plug" from the fuel opening that then allowed me to use leaded fuel. I recall knowing that the leaded fuel would destroy the cat. converter in short order. What I do not recall is why I did this in the first place, was it to save money on cheeper gas or to increase preformance?Comment
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Re: avation fuel
It was proven decades ago that lead is not required in these engines to protect them as was originally feared. If the car is experiencing detonation on pump gas, there are other strategies that can be used. If there is no detonation, stop using the additive.Comment
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Re: avation fuel
Probably to get the higher octane (leaded) gas. Original non-lead was around 87-89 RON if I recall.
In addition, most also removed the cat converter and installed a "temporary test pipe" in its place. However, the test pipe was generally permanent.
. That is what I did.
LarryComment
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Re: avation fuel
No. Our 'regular' gas is and was and has almost always been around 91 RON. Today's super or premium is around 95 to 97 RON depending where they live.
People forget that the octane rating system changed dramatically just about the same time as the introduction of unleaded fuel.Comment
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Re: avation fuel
I use 50% aviation gas and 50% premium gas in my Corvette 1963 and the only problem was the accelerator injector in the carburetor was rubber and change for leather type solve the problem.Comment
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Re: avation fuel
Have any of you guys using Av Gas ever been checked by the state police/DOT guys for using AVGAS in your cars on the highway? I know here in North Carolina it is a criminal offense to use it for On Road vehicles, thus is one reason for the dye in it (as in off-road diesel fuel) to help in identifying it as such. I've thought about it several times, but not sure if it is worth the penalties.Comment
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Re: avation fuel
OK EVERYONE, I could care less obout octane or the cause of less of it. I will never use AVGAS again becausee of the problem it caused ME. I understand a lot of you have had a great time with it and I wish I did as well , but not the case. BUT WHY DID I HAVE ALL THE LEAKS THAT I DID . I AM STARTING TO THINK IT WAS THE THE FUEL THAT I GOT AND NOT THE CAR . I am not a smart man but i do know my car and i did not miss something. STILL HELP IS NEEDED ON WHY THE LEAKS MAY HAVE HAPPENED. Thanks to all you have helped me rethink this. GREGComment
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