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Old Jun 15, 2006 | 03:24 PM
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Default av gas anyone ??

has anyone ran some av gas (100LL) with 93? It is $4.19 gal here at meacham airport.

I have a very fast Lingenfelter 346, no cats 100 shot NOS.
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Old Jun 15, 2006 | 04:04 PM
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First, 100LL avgas is a really bad thing to put in any car with an O2 sensor...

100LL avgas is 100 octane "low lead" in name only. It came about as a result of enviromental pressure on the aviation industry. Despite the name it has bunches of lead in it. It is only "Low lead" in comparison to the previous 100 octane and 145 octane leaded fuels that were discontinued. Ask any aviation mechainc who has used a dental tool to pick out the ***** of lead that accumulate in the lower spark plugs of aviation engines....

It will destroy you O2 sensors in short order, and is really not suitable for use in auto engines...

There were some other threads on the subject of octane boosting that were the subject was brought up and there is more posted on it...

In short, don't waste your time...
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Old Jun 15, 2006 | 05:47 PM
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i've done 100 octane unleaded .. didnt notice a difference .. i dont think i have enough timing to take advantage of it tho
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Old Jun 15, 2006 | 06:37 PM
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roger that, just wondering, since i work at the airport its easy to get high octane fuel instead of running across town. wanted to be safe when I use the NOS especially in this heat. Running low timming so that helps a lot down here.
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Old Jun 15, 2006 | 11:55 PM
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It will trash your sensors in short order. Not worth it. Now a 60-70s Musclecar or vette with 12 to 1 compression (Like a 70 LT-1) it would be a different story.
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Old Jun 16, 2006 | 10:32 AM
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Used to do that years ago before emissions with high compression and supercharged engines. Mixed Amoco no-lead with 130 Avgas on a 2-1 ratio and it worked good. Knew a guy that put straight 130 avgas in his stock Ford Flathead because he thought it would give him more power. He ended up burning his exhaust valves because of the avgas's slow burn rate.
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Old Jun 16, 2006 | 12:11 PM
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Originally Posted by towercontroller
roger that, just wondering, since i work at the airport its easy to get high octane fuel instead of running across town. wanted to be safe when I use the NOS especially in this heat. Running low timming so that helps a lot down here.

It's a great thing with the right car, when I was fixing aircraft in the early 90's I would take the drained gas from the trucks (X amount needed to be drained daily to remove any water from the bottom of the tank) I would let the water seperate and skim the fuel off the top. I had free gas for 3 years! But that was in a 70's Camaro so it didn't matter. Not so good for the new Vette though.
13:1 in my DD was cool.
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Old Jun 16, 2006 | 12:42 PM
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Used to buy 100LL at the local airport... that was when I was running a car that ran on leaded gas. I wouldnt do it for with your C5.

VR
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Old Jun 16, 2006 | 02:41 PM
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Originally Posted by DOUG @ ECS
It's a great thing with the right car, when I was fixing aircraft in the early 90's I would take the drained gas from the trucks (X amount needed to be drained daily to remove any water from the bottom of the tank) I would let the water seperate and skim the fuel off the top. I had free gas for 3 years! But that was in a 70's Camaro so it didn't matter. Not so good for the new Vette though.
13:1 in my DD was cool.

Knew a guy that did the same thing with Jet Fuel for his diesel truck. Only problem was that he used a drum that had had aircraft paint stripper to collect his fuel and ended up with a real mess.
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Old Jun 16, 2006 | 03:56 PM
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You could tune the car in open loop SD and it would able to run leaded fuel.
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Old Jun 21, 2006 | 01:15 PM
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Default av gas in vette

Ive used it in bikes,but not in computer cars for the same reasons previously cited.Another thing about av fuel is the fact that it burns alot slower than auto fuel.If you had a non computer car you could mix it & improve yr octane....thats what I did with my bike.I had pop-up pistons & it improved my overall octane.Remember an average a/c turns less than a 1/3 revs to yr hot rod.....
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Old Jun 21, 2006 | 03:19 PM
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Ran a mix in my 63 SW It was a 327 w/high compression, but that was a few years back. Ran a 40/60 mix.
Would not run it in a C5. From what I understand it will toast the pistons big time.
Find out what OCT Corvette Racing is running. Bet it's top of the line SUNOCO.
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