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#11
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What about the fact that AV Gas contains lead while Gasoline doesn't?
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#12
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It does have small amount of lead (which will destroy cat converters if equipped). Although you have 11:1 compression, you have to figure in timing (if deviating from stock) as well. This could cause an increase in detonation, requiring more octane
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70 L78 Nova Fathom Blue,Bench, 4spd, F41, 3:55 71 Porsche 911 Targa |
#13
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I used to mix it 50/50 with 93, now I run it straight and have a carb set up for it when I go to the track, I use another carb and 93 on the street
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1969 ZL1 COPO Camaro 11.60@120 F.A.S.T 21 1971 LS6 vette 12.20 @118 PSMCDR |
The Following User Says Thank You to 1971ls6 For This Useful Post: | ||
MarcDant (01-02-2023) |
#14
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Quote:
For those running AV gas 100LL now stock up cause it’s going away very soon. The new unleaded AV gas has been approved. Pilots are not happy about the change over I can tell you that but 100LL despite its name actually has a lot of lead in it. So it’s gone. Keep in mind that Aviation engjnes run at about 2600 rpm’s and this fuel is designed to run that RPM sustained more than 1000 to 6000 Rpms that being said it’s always run well for my cars and lots of landscaping equipment without changes. Many lycoming engines running av gas are low 7.9 compression. Sometimes as low as 7.0! Big bore engines. Last edited by turbo69bird; 01-02-2023 at 10:43 PM. |
#15
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Thought some of you may enjoy this read about AV gas and of course none of us use AV gas on the street because that would be illegal. This information on AV gas is for off-road / track purposes only
https://www.aviationsafetymagazine.c...urn-baby-burn/ |
#16
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Quote:
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#17
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I do run a 50/50 93/AvGas mix in my old 911, has a 9:1 ratio, but high RPM. It runs VERY well on this fuel set up
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70 L78 Nova Fathom Blue,Bench, 4spd, F41, 3:55 71 Porsche 911 Targa |
#18
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I ran it with Sunoco Ultra 94 … Had good results…
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#19
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I had a higher compression Buick and it would ping like crazy on regular 93, putting 5 gallons of av gas to a tank eliminated the ping and never an issue with the carb.
I also ran it in my outboard drag boat with zero issues. I was told that the rating of 100 octane was a min rating and it could see higher numbers. |
#20
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Here in Sarasota County I can get Sunoco 90 and 100 octane non ethanol at the pump. Will likely just use that simply because of ease of filling the tank. Prior to the AV gas this is what I was running, but just wanted to try the AV Gas.
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65 Corvette Coupe L78 67 427/390 Vette Coupe unrestored 67 L-79 Vette roadster (Top Flight) 69 L71 Roadster Survivor 69 L46 Roadster Survivor (Sold) 69 Z/28 RS 69 Dodge Charger R/T 70 W30 442 Auto Air Survivor 2016 Z06 Coupe M7 70 AAR Cuda (Sold) 69 L78 Chevelle |
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