Re: Airplane/aviation fuel
[Re: an8sec70cuda]
#2466494
03/14/18 05:31 PM
03/14/18 05:31 PM
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Joined: Aug 2003
Posts: 1,578
KOS
pro stock
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pro stock
Joined: Aug 2003
Posts: 1,578
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I ran 100LL AvGas for a long time in a 12:1 440 street/strip combo. Ran great and never hurt anything. Know a local guy that ran it for YEARS in a 13:1 BB Chevy w/ 2 stages of nitrous. One of those guys that bought up leftover parts people were scared to run, but built an engine out of them that ran for years...too cheap to buy race fuel, so he always ran Avgas. Worked great for him.
This is one of those subjects that 99% of the people telling you not to run it have zero experience w/ it and are just repeating hearsay. 100% true Chip kinda makes me laugh at some of the stories tho....as far as tune up it should be close if your running race gas already like c12 or ?? my jetting stays the same. if its pump gas probably need to be little richer when switching to AV.the only time I need to change anything on my setup and Ill run 3/4 different types of fuel depending on my resources is when I use Q16 which is a lot richer than AV.as a matter of fact this year and from now on I will be using AV gas 95% of the time or Q16 if I want alittle more performance its the only fuel thats ever outperformed the AV gas everything else runs the same.
Last edited by KOS; 03/14/18 05:38 PM.
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Re: Airplane/aviation fuel
[Re: DusterKid]
#2466998
03/15/18 06:02 PM
03/15/18 06:02 PM
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Joined: Feb 2010
Posts: 1,645 Phila. Pa.
Mattax
top fuel
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top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
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110, That's probably 'Standard.' https://www.sunocoracefuels.com/fuels/compare-fuelshttps://www.sunocoracefuels.com/fuel/standardIts going to be tough to calculate the change unless you measure the SG yourself. The pump gas specs will vary depending on where you live, time of year, and batch. Most of Md, the first two variables will apply. Chart from Exxonmobile reposted here: https://www.tapatalk.com/groups/racingfu...s10.html#p16730Its a little different than what we get up here, but both are Complex Model Refomulated Gas (RFG). For SE Penns'ia, if I understand correctly, it should meet 8.5 RVP in summer and is allowed 11.5 RVP Winter. Also that refiners need to supply Summer blend by May 1, but retailers have until June 1 to be switched over. Southern RFG may be a little different, along with the mandated summer/winter switch over dates. Winter blends are a b*tch in warm weather. Anyway I think you just going to have to test at the track
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Re: Airplane/aviation fuel
[Re: WO23Coronet]
#2467174
03/16/18 12:54 AM
03/16/18 12:54 AM
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Joined: Aug 2003
Posts: 43,285 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,285
Bend,OR USA
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What does specific gravity have to do with the tune/jet/heat range of spark plugs? I look at that as the way to measure how thick the gasoline molicules (SP?)are, the higher S.G. the closer the molicules are to each other(thicker ) so I have needed to lean the fuel mixture to get the spark plugs and time slips the best I can get them, 100 L.L. aviation fuel with .690 S.G. I bought and used needed bigger jets than on race gas to get close to what I liked to see on race gas with .740 S.G. Always jet up until the 1/4 MPH slows down, no matter what type of gas
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Airplane/aviation fuel
[Re: DusterKid]
#2467650
03/17/18 10:04 AM
03/17/18 10:04 AM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,933
A shed in England
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We've used AVGAS and a Super unleaded 50/50 mix for years and on many different engines with no issues, race gas is just so expensive over here in the UK. The 100LL is about a 1/2 of the price of real race gas. I once had to get some race gas at the track as I progressed through the rounds and ran out of my normal avgas/super mix. FWIW we didn't notice any difference in performance or any change in the AFR's just a lighter wallet
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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