avgas substitute

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daddgonemadd
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avgas substitute

Postby daddgonemadd » Sun Jul 06, 2014 7:03 pm

Getting my boat together, and thinking about fuel. PE-90 power. Dual mags, holley 500 carb. The previous owner claims he only used pump premium, which I believe. I'm now thinking it would be worth the expense of using the right fuel, and setting the ignition timing accordingly. Don't want to give up any performance, or reliability, and I've seen the difference in my race motorcycles.

Where I am located, I have easy access to Sunoco 110 leaded race fuel, at the same price of avgas. I know it doesn't have the rediculus amount of lead as 100LL, but at least it has some.

Anyone have experience with this?

billybob
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Re: avgas substitute

Postby billybob » Sun Jul 06, 2014 7:09 pm

Where can you get 110 the same as Av gas? I want some.
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GMAC 76
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Re: avgas substitute

Postby GMAC 76 » Sun Jul 06, 2014 7:15 pm

billybob wrote:Where can you get 110 the same as Av gas? I want some.

X2

daddgonemadd
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Re: avgas substitute

Postby daddgonemadd » Sun Jul 06, 2014 7:58 pm

Guess I should do a drive by tomorrow and check prices. Back when I was racing they where about the same. Local airport is $5.85 100LL and no self serve pumps.

Will report back, and maybe change my plans.

billybob
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Re: avgas substitute

Postby billybob » Sun Jul 06, 2014 9:15 pm

Where are you located?
I do all my own stunts!!!!!!

terrible ted
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Re: avgas substitute

Postby terrible ted » Sun Jul 06, 2014 9:42 pm

The 110 fuel 8 a gallon last time i checked and av gas was 4.75 2 months ago.

cody_spencer
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Re: avgas substitute

Postby cody_spencer » Sun Jul 06, 2014 11:40 pm

You have an AIRCRAFT ENGINE why put anything other than AIRCRAFT FUEL in your engine. That's what it's meant to run so that's what I put in mine. It would be like putting plain gasoline in a 2 stroke engine. It might run for a little while but the longevity of it wil decrease

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Re: avgas substitute

Postby sseater » Mon Jul 07, 2014 7:07 am

cody_spencer wrote:You have an AIRCRAFT ENGINE why put anything other than AIRCRAFT FUEL in your engine. That's what it's meant to run so that's what I put in mine. It would be like putting plain gasoline in a 2 stroke engine. It might run for a little while but the longevity of it wil decrease


terrible comparison. run the premium pump gas in the pe90. every 10th tank or so run some avgas thru it and youll be fine. i have friends that have that same motor and they've never seen avgas in 10-15 years.
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daddgonemadd
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Re: avgas substitute

Postby daddgonemadd » Mon Jul 07, 2014 8:14 am

The Sunoco was $8/gal this morning. Guess its been a few years.

I am in northern Illinois, and I don't know of any drive-up self serve 100LL pumps anymore. Post 9/11 security really changed ramp access.

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Re: avgas substitute

Postby Uhairball » Mon Jul 07, 2014 8:46 am

daddgonemadd wrote:The Sunoco was $8/gal this morning. Guess its been a few years.

I am in northern Illinois, and I don't know of any drive-up self serve 100LL pumps anymore. Post 9/11 security really changed ramp access.


So what is the difference between the two, other than paying road tax?

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emmitt Kelly
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Re: avgas substitute

Postby emmitt Kelly » Mon Jul 07, 2014 4:49 pm

daddgonemadd wrote:The Sunoco was $8/gal this morning. Guess its been a few years.

I am in northern Illinois, and I don't know of any drive-up self serve 100LL pumps anymore. Post 9/11 security really changed ramp access.



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daddgonemadd
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Re: avgas substitute

Postby daddgonemadd » Mon Jul 07, 2014 6:49 pm

Uhairball wrote:
daddgonemadd wrote:The Sunoco was $8/gal this morning. Guess its been a few years.

I am in northern Illinois, and I don't know of any drive-up self serve 100LL pumps anymore. Post 9/11 security really changed ramp access.


So what is the difference between the two, other than paying road tax?



No road tax on the Sunoco, but it is blended for 12,000 rpm use and quick throttle response. 100LL less octane, way more lead, and blended for constant rpm, low at that, and to be stable at high altitude.

100LL, while often used for the octane, is a relatively poor choice for cars and motorcycles due to flat throttle response. Because it is blended for high altitude use at constant throttle settings, it doesn't have the light aromatics necessary for quick response.

terrible ted
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Re: avgas substitute

Postby terrible ted » Mon Jul 07, 2014 9:32 pm

cody_spencer wrote:You have an AIRCRAFT ENGINE why put anything other than AIRCRAFT FUEL in your engine. That's what it's meant to run so that's what I put in mine. It would be like putting plain gasoline in a 2 stroke engine. It might run for a little while but the longevity of it wil decrease



Not nearly a good comparison more like leaded verse nonleaded fuel. there is 93 avgas the lead is for the valve lubrication. Really we are not using the fuel in flight so so all we need is lead and octane for your compression ratio. Basically were running ground vehicles with air cooled motors designed for leaded fuel like a 1970 Vw bug.

Uhairball
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Re: avgas substitute

Postby Uhairball » Tue Jul 08, 2014 5:47 am

terrible ted wrote:
cody_spencer wrote:You have an AIRCRAFT ENGINE why put anything other than AIRCRAFT FUEL in your engine. That's what it's meant to run so that's what I put in mine. It would be like putting plain gasoline in a 2 stroke engine. It might run for a little while but the longevity of it wil decrease



Not nearly a good comparison more like leaded verse nonleaded fuel. there is 93 avgas the lead is for the valve lubrication. Really we are not using the fuel in flight so so all we need is lead and octane for your compression ratio. Basically were running ground vehicles with air cooled motors designed for leaded fuel like a 1970 Vw bug.


So where can you buy the 93 AVGAS? Is there a website showing where it is available and price?

terrible ted
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Re: avgas substitute

Postby terrible ted » Tue Jul 08, 2014 8:05 am

I have read about it and my mechanic said not to buy the 93 octane av gas. I have a- 10:1 540. As far as i know its mostly overseas but i guess there some here to.

http://en.wikipedia.org/wiki/Avgas.



I read some were it not legal to run leaded avgas in road vehicles?

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Re: avgas substitute

Postby BigBlockFalcon » Thu Jul 31, 2014 9:26 am

I run some 93 unleaded in mine. I always have more AV gas in the tank than regular gas.
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Re: avgas substitute

Postby Thunder200 » Thu Jul 31, 2014 9:32 am

Try calling a couple close airports within range of you. They will usually let you in to get some fuel.

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BANANA BOAT
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Re: avgas substitute

Postby BANANA BOAT » Thu Jul 31, 2014 10:50 am

"Ridiculous amounts of lead" ?
100 LL (low lead)

terrible ted
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Re: avgas substitute

Postby terrible ted » Thu Jul 31, 2014 1:03 pm

compared to what we use to run in cars 100 ll has more lead


100LL (blue)
Taking a fuel sample from an American Aviation AA-1 Yankee under-wing drain using a GATS Jar fuel sampler. The blue dye indicates that this fuel is 100LL.

100LL is pronounced "one hundred low lead". It contains about one-half the TEL allowed in 100/130 (green), though the amount is about 4 times what was in pre-1975 leaded automotive grade gasoline.[citation needed]

Many Continental and Lycoming light airplane engines designed for 80/87 remain in production. Engines designed for 80/87 and not for 100LL might have lead buildup and lead fouling of the spark plugs if 100LL is used.[citation needed]

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Re: avgas substitute

Postby BANANA BOAT » Thu Jul 31, 2014 1:26 pm

So it is low lead compared to another type of gas?


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