[DeTomaso] Fwd: Av fuel vs race gas

[Jerry R Knotts]

This particular car is my 66 Cobra with a Cleveland.  Has a perpetual ping 
so I am going to try some av gas before I buy a new distributor.  I suspect 
a mismatch between the pistons and the heads.  Or at least a minimum squish 
area.  I am on the second carb.  It came with an Edelbrock and now has a 
Demon.  If the av gas works I may get an E85 carb an run it that way with 
the E85.  We have a station within 30 miles and I have some 55 gal barrels. 
Although  an extra dollar a gal might be more economical for the 100 octane.

jerry
----- Original Message ----- 
From: "Sean Korb" <spkorb at gmail.com>
To: "List Pantera" <detomaso at realbig.com>
Sent: Thursday, April 12, 2012 9:04 PM
Subject: Re: [DeTomaso] Fwd: Av fuel vs race gas


> Don't use aviation fuel in any car with a catalytic converter.  It
> *will* destroy the converter.  And for sure, on a pre 1975 car don't
> tell the feds or state officials you are doing it or planning it or
> have done it.  They want their tax money.  Other than that, let's go
> racin'!
>
> A friend of mine was brewing her own corn-oil based fuel and had
> graphics all over her truck saying so.  A DMV cop at a rest area had
> all that shut down in a hurry.
>
> sean
>
> On Thu, Apr 12, 2012 at 9:58 PM,  <jgkrenton at comcast.net> wrote:
>>
>>
>>
>>
>> Jerry:
>>
>>
>>
>> I can't address the issue of the lead vs synthetic oil, but as someone 
>> that grew up in airplanes and cars (turbo's in both) the basic difference 
>> between "basic" Auto fuel (I don't want to discuss California fuel) is 
>> what is called the Reed Vapor Pressure. Essentially Av-gas has a much 
>> higher boiling temperature than car-gas. This prevents vapor-lock, fuel 
>> boiling in your fuel lines or carburetor, at altitude., Your engine 
>> suddenly quitting is much worse in an airplane than when your car quits 
>> at a stop light on a hot day. Of course the addition of Alcohol to 
>> car-gas made the situation much worse for cars. Additional fuel pressure, 
>> such as most Fuel Injected Engines have, is a method to prevent fuel 
>> boiling...
>>
>>
>>
>> The other thing is Av-Gas has more stabilizers in it so it stores better 
>> than car-gas. (airplanes tend to sit a lot...)
>>
>>
>>
>> I've been running Av-Gas in cars for years, when the octane demands 
>> justified it, (it's expensive!) without problems.
>>
>>
>> Of course, your results may vary!
>>
>>
>>
>> Good luck!
>>
>>
>>
>> Jeff/2467
>>
>>
>> ----- Forwarded Message -----
>>
>>
>>
>>
>> From: "Jerry R Knotts" <knottsj at galstar.com>
>> To: detomaso at realbig.com
>> Sent: Thursday, April 12, 2012 3:11:18 PM
>> Subject: [DeTomaso] Av fuel vs race gas
>>
>> Collective,
>>
>> All my life I have heard that aviation fuel has additives that make it
>> unsuitable for automotive use. Is it only that you carb won't ice at 
>> 20,000
>> ft or is there more to it than that. I have been told that you should add 
>> 1
>> oz of Marvel Mystery Oil to each gallon of aviation gas that you use. I
>> have also been told to mix it 1/2 and 1/2 with regular unleaded 91 oct.
>> With aviation gas at $5.00 and race fuel at $10.00 it makes a difference 
>> to
>> me for a higher compression engine.
>>
>> Thanks in advance to the collective,
>> jerry
>>
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>
>
> -- 
> Sean Korb spkorb at spkorb.org http://www.spkorb.org
> '65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
> "The more you drive, the less intelligent you get" --Miller
> "Computers are useless. They can only give you answers." -P. Picasso
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