Race gas vs AV gas

[Photon440]

Thanks! Can you explain what the N means. Could I use a registration from a plane on the field or have on from some plane on a different field.

Most private aircraft registration numbers start with an "N". The credit card machine likely won't know if you make a number up.

 

[Curiousyellow71]

Back in my youth with our 440 w 13.4:1 we really needed the av gas to work or risk blowing our racing budget. We did not change jets when we switched from sunoco, the afr did not change for whatever reason. On that engine we ran out of av gas one night and tried pump gas w 104+ octane boost. We put the little bottle in a 5 gal cell of 91 and it pinged idling. We ended up dumping 4 of the little bottles desperate to take it out that night since the airport was closed. It still pinged like crazy just idling w no load. So much for 104+.Lol The 850race dp we ran then is on our 69 charger. The gaskets survived about 15 years but they did shrink.

Then on a 318 with a turbocharger we ran av gas. When we pulled timing we were up to 18 lbs boost. I know our carb was way off but this was 30 years ago before the modern day controllers and boosted carbs. With timing we would try running 12 psi and still struggled with detonation. Seem to be happiest around 9psi.. Pump gas it basically would not run at all and it would ping. We had it scream a couple times on cool nights w av gas. While doing a burnout the 318 pegged the tach in drive, that was with 3.23s! I get guys staying with race gas. Different can be concerning and engines arent cheap..but I am not afraid of running it. Burned a bunch of it...a whole bunch. Back when our charger was 11.5:1 adding 5 gallon in a tank of 87 worked great as well.

 

[Photon440]

To back up a bit, I guess this thread based mostly on
A) being cheap. Letting the wallet do the critical thinking. And,
B) mixing something into your fuel supply. Which is fine, you could mix in damn near anything and it will eventually burn its way out.
The thread title to me strikes more of a chord about actually racing, not burbling around on the street.

There is rejetting. Widely accepted across all types of forum boards.
Gaskets drying out. Cant confirm, but thats the general census. Race fuel carbs can sit for years and still be good.

Rejetting is not an issue, any serious racer will be ready to change the jets, even if the humidity changes or going to a track with a different elevation. Rejetting for avgas wouldn't be any different than if you had changed from automobile gas with ethanol to a dedicated race gasoline.

You cant be serious. People fall out of the sky from it. Many deaths per year. I would have more concern about that then someone who smoked a doobie and plowed into me at 5.8 mph.
Take Five: Carburetor Icing (TP 2228E - 38)

I didn't say that there wasn't an issue with icing, I said that gas shouldn't ice up unless it had water in it. I'm aware that people experience engine failures due to icing, many of which can be traced back to not checking for water in the tanks before flight. The small amount of FSII added to aviation fuel to mitigate moisture problems will also help check bacterial growth in the fuel, but this has nothing to do with the ability of Avgas to be used in a racing car engine.

Now I know that some topics have ardent support for and against, just like the ported vs. manifold vacuum debate. I can only say that the few people that I know of that raced with avgas did it with success. I also know that people (particularly the turbo Buick fans) have raised the octane of premium gas by adding pure toluene, another for and against topic. But it works, unfortunately is also expensive if you buy it a gallon at a time at a hardware store.