Re: AVGas versus Race gas

["Brian Wagner" <scirocco_88_16v@hotmail.com>]

The key to this statement is the AV Gas is leaded fuel, so in car with cats 
it is a no no. If the car is non cat then AV Gas can still be used, 
tetra-ethyl lead in AV Gas is the same as what was in gasoline for you car 
until the EPA stepped in. The lead is an inexpensive octane booster, Racing 
gas is more refined which adds to it cost.

Just rambling, I researched this once a long time ago.

Brian


87 16v
86 8v (parts car)
85 Wolfsburg (new parts car)



>From: "Scott F. Williams" <sfwilliams@home.com>
>To: "Scirocco List" <scirocco-l@scirocco.org>
>Subject: AVGas versus Race gas
>Date: Thu, 29 Nov 2001 11:04:19 -0500
>
>I figure that my fellow tech geeks may find this interesting:
>
>There is a debate going on the 323GTX list as to whether AVGas is a
>reasonable substitute for high-octane automobile fuel. The usual "it worked
>in my car, so there" opionions have trickled off and now somebody has come
>forth with real technical information. So, here is a good (slightly edited)
>snippet:
>****************
>
>"Aircraft motors tend to be steady state machines, accellerating and
>decellerating less frequently than automotive engines (More often than 
>using
>the throttle, you change the pitch of the prop on more modern aircraft.)
>Anyway,
>they need low reid vapor pressures to prevent fuel from vapor-locking at
>high-altitudes and they need good octane to provide power over time with 
>low
>EGT's. AVGas uses lead-branched parrafins to achieve this.
>
>Racegas uses a blend of aromatic hydrocarbons to achive high octanes. This
>prevents
>knock and is very well suited to motors that must increase in RPM quickly.
>______________________________
>Scott F. Williams
>Account Manager
>GENUiTY - Eastern Region
>100 Wall Street, 10th Floor
>New York, NY 10005
>*NEW* Voice: 646.576.8465
>Cell: 917.648.2256
>scott.williams@genuity.com
>
>
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