<VV> Aviation fuel (gas) in Corvairs

[Bill Elliott]

It's possible (and even likely)  that I'm out of date, but I thought 
that the most common avgas was still 100LL and has about .5g of lead per 
liter (or about 4 times what regular leaded gas had) .

If modern avgas is only 87-91 octane AND has lead, then why in the world 
would you want that for a Corvair over 93 unleaded?

Easier ways to get octane? Every track I've been to sells high octane 
unleaded.... and my local gas station sells high octane leaded CAM2  
(though I'm not certain what the lead percentage is, I thought that it 
was similar to the older regular leaded street fuels)

Bill





John Kepler wrote:

>"It's also generally packed with lead... even "low lead" aviation fuel 
>has extremely high lead levels"
>
>You may need to get out a little more....your info is at least 20-30 years
>out-of-date!  70% of all av-gas used in the last 25 years is basically 87
>octane automotive unleaded...a secondary "Supplemental Type Certificate"
>(STC) allows the use of 91 octane pump automotive "Premium" for some old
>"low-lead" applications...that covers most Continental and Lycoming engines
>built over the last couple of decades.  Conversion to "low-lead" or
>"no-lead" capability has been part of an FAA "Major" for the last couple of
>decades.  The remaining low-lead fuels have less lead than pump "regular"
>did 30 years ago (about 0.12 g/l).  
>
>Old 100/130 "Green" "high-lead" (1.12 g/l), what you are thinking about, is
>nearly impossible to find.....military 115/145 "old purple" avgas (with a
>whopping 1.8 g/l of lead!), my favorite for brewing racing fuels, is rare,
>but still around (look for an airport with something ex-military sporting a
>big old P&W or Wright radial parked)...but expensive!
>
>
>... something that a Corvair neither needs 
>nor wants. You can get more octane in a number of easier ways...
>
>Name one?  NASCAR and I would LOVE to know!
>
>John
>
>
>  
>
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