Re: Aviation fuel in a drag car. OK or Bad idea?
[Re: Mroctober]
#188639
01/10/09 02:45 AM
01/10/09 02:45 AM
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Joined: Aug 2003
Posts: 43,347 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,347
Bend,OR USA
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I use to use avaition fuel in my race cars until I found all of the exhaust valves and seats pitted in my NHRA A/SA 1963 M.W. Belevedere, that was over thirty years ago when valves where cheaper. I have use race gas in my race motors every sense No burnt or pitted valves on race gas so far I owned a 1960 Piper Comanche airpalne for 15 yrs that had a 260 HP engine rated at 2700 RPM 540 C.I. air cooled opposed six cylinder in it, if I baby it at all it would lead foul spark plugs so I learned to lean the motor out as soon as it started and never let it loaf unless I was descending to land, I still kept the mixture fairly lean unless I was doing what is referred to as a go around and you then go to full rich for max power and lean it out as soon as you reach 3000 ft. above seal level. Avaition gas is design and made for slow turning low compression (8.5 or lees) air cooled engine, not high compression high revving race motors, avaition gas also has additives to give it a long shelf life as a lot of general avaition airplanes sit a lot between flights the specific gravity of most batches of 100 LL is around or under .690, most good race gas is higher than that
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Aviation fuel in a drag car. OK or Bad idea?
[Re: bigdad]
#188640
01/10/09 04:46 PM
01/10/09 04:46 PM
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Joined: Jan 2003
Posts: 26,027 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,027
Rio Linda, CA
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Whether or not avgas is suitable for a race car depends on the car/combo. If your combo's requirement exceeds the octane rating of avgas it's not suitable, for others it is.
The INTERNET, the MISinformation superhighway
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Re: Aviation fuel in a drag car. OK or Bad idea?
[Re: rebel]
#188644
01/11/09 06:25 AM
01/11/09 06:25 AM
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Joined: Jan 2003
Posts: 8,182 Detroit, MI
CokeBottleKid
master
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master
Joined: Jan 2003
Posts: 8,182
Detroit, MI
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I was close to choosing AVgas testing as a senior project for school this past week, simply because it's ALWAYS a debate when someone brings it up yet NO ONE has any REAL data other than here-say and conjecture. Since I didn't choose it for my project, here's my here-say and conjecture . It's rated at 100 RON, i've NEVER seen any MON data, also i've HEARD the way the RON test is done is DIFFERENT than the one done for vehicles. I've HEARD it actually has better storage properties than race fuel, octane does not degrade nearly as fast since planes stay on tarmacs for extended amounts of time... My car has gone 8.0's with it with the assistance of some methanol cooling, how much it contributed to octane is unknown.
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Re: Aviation fuel in a drag car. OK or Bad idea?
[Re: CokeBottleKid]
#188645
01/11/09 07:16 PM
01/11/09 07:16 PM
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Joined: Jan 2003
Posts: 26,027 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,027
Rio Linda, CA
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It's not all here-say and conjecture, there have been dyno charts posted in the past showing no appreciable difference between avgas and race gas with that particular motor.
Again, avgas is not appropriate for some circumstances.
The INTERNET, the MISinformation superhighway
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Re: Aviation fuel in a drag car. OK or Bad idea?
[Re: 65dragnet]
#188647
01/11/09 08:27 PM
01/11/09 08:27 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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I don't know about all the scientific stuff but I ran 100LL in my dragster it was 14:1 copression and I used a 250 big shot plate on it also.Ran a best of 7.75@173mph no problems.
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