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Re: AVIATION FUEL? [Re: MR_P_BODY] #433513
08/11/09 10:16 AM
08/11/09 10:16 AM
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Posts: 518
ny
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greenmcode Offline OP
mopar
greenmcode  Offline OP
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ny


I would have to say you were/are over octaned before.
I use to use 114 in my car and dropped to a lower
octane and went quicker(faster burn rate)





So I should cut the 110 with some 93?
How much?
Thanks


1969 A12 R.R. 11.61 117.96 F.A.S.T. STOCK STROKE..
Re: AVIATION FUEL? [Re: greenmcode] #433514
08/11/09 10:28 AM
08/11/09 10:28 AM
Joined: May 2005
Posts: 6,446
NJ-USA
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HPMike Offline
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Taken from the VP website..

C12
The best all around racing fuel made. Recommended for CRs below 15:1, satisfying the needs of 75% of today's race engines. One of the winningest fuels in racing history, including Modified Tour, GNN, D.I.R.T., Indy Lights, NHRA, AMA as well as other local and national championships across the U.S. and around the world.
Color: Green
Motor Octane 108
Specific Gravity: .717 at 60° F


Based on several dyno tests with different fuels (specifically engines similar to yours), I would say that C12 is what would work best. I would be very surprised if anything yielded any power gains. I am not saying that you couldn't experiment with something else, but beware of subtle detonation that will make short work of your motor. Those types of builds are very dtonation sensitive. Bob K has you running a ton of total advance IIRC-which could make it more octane sensitive.

MB

Re: AVIATION FUEL? [Re: HPMike] #433515
08/11/09 10:45 AM
08/11/09 10:45 AM
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Posts: 3,695
nc
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emarine01 Offline
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nc
I think the whole octane thing is pretty strait forward on the high compression engines 12.5 + but on the mid compression rigs 180 to 210 psi cyl pressure it gets tricky, too much octane leads to a lot of spark advance and the possibility of negative work, too little octane eats engines, I wish the 103 octane fuel was available here but haven't found it yet so the 100LL seems to fit the bill for my engine, I have run the best ETs on 93 and 110 race mix but cant seen to get a consistent mix

Re: AVIATION FUEL? [Re: Cab_Burge] #433516
08/11/09 02:58 PM
08/11/09 02:58 PM
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Posts: 25,757
Rio Linda, CA
John_Kunkel Offline
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Quote:

the last thing is most airplane don't travel close to the ground so the fuel is designed to be ran at higher altitudes, 5000 ft MSL or above is normal




So what do they do, take them to 5000 feet under a balloon and then drop them?

I was an aircraft owner for twenty years and seldom flew above 2000' MSL.


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Re: AVIATION FUEL? [Re: John_Kunkel] #433517
08/11/09 04:39 PM
08/11/09 04:39 PM
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Posts: 83
Mississippi Gulf Coast
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Mroctober Offline
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Tried 112 racing fuel and 105 avia fuel, Time is the same as racing gas !!! At 4.90 Gal to 9.00 gal

Re: AVIATION FUEL? [Re: Mroctober] #433518
08/11/09 04:59 PM
08/11/09 04:59 PM
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
an8sec70cuda Offline
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Quote:

Tried 112 racing fuel and 105 avia fuel, Time is the same as racing gas !!! At 4.90 Gal to 9.00 gal



I've had the same results switching from 110 race fuel to 100LL AvGas, but you can't tell that to some people. CHIP


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: AVIATION FUEL? [Re: John_Kunkel] #433519
08/11/09 05:07 PM
08/11/09 05:07 PM
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nc
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emarine01 Offline
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Quote:

Quote:

the last thing is most airplane don't travel close to the ground so the fuel is designed to be ran at higher altitudes, 5000 ft MSL or above is normal




So what do they do, take them to 5000 feet under a balloon and then drop them?

I was an aircraft owner for twenty years and seldom flew above 2000' MSL.


Drop them

Re: AVIATION FUEL? [Re: Rug_Trucker] #433520
08/11/09 05:08 PM
08/11/09 05:08 PM
Joined: Dec 2005
Posts: 202
CA
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62SAVOY Offline
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CA
Quote:

Quote:

1/2 QUART OF TRANNY FLUID TO A TANK FOR LUBRICATION Its a dry fuel, and will score the crap out of the cylinders and eat valve seats,

Kasey




Funny how some people say, "no tranny fluid in the diesel!" "It has no lubricating properties."

If you pour ATF in the gas it will lower the octane.




ATF is basically a high detergent 10 wt oil. Works good for cleaning the injectors on diesel motors. We had problems with our 550 Ford. Ran crappy. I did a scan test on it and showed problem injectors. We bought it used and was sorting thins out on it. Uncle was mechanic for years. Or since the dinosaurs roomed the earth we used to joke. Even working on the new engines that were out. He told me run tank real low and add 1 gallon of ATF than drive for a bit. Boss drove it daily being his daily vehicle. Came into shop a few days later telling me to rescan again. This thing is pulling hard now getting on the freeway. Rescanned and all injectors showed good.

Re: AVIATION FUEL? [Re: 62SAVOY] #433521
08/11/09 08:46 PM
08/11/09 08:46 PM
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Not2farfromNashville, TN
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Rug_Trucker Offline
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I have been pouring purple colored Honda fluid in the tank. I have been adding 2 qts on fill up. '93 Gen I. I wonder if the DOT dipped my tanks what color the fuel would be?

Re: AVIATION FUEL? [Re: John_Kunkel] #433522
08/11/09 10:02 PM
08/11/09 10:02 PM
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Bend,OR USA
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Cab_Burge Offline
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Quote:

Quote:

the last thing is most airplane don't travel close to the ground so the fuel is designed to be ran at higher altitudes, 5000 ft MSL or above is normal




So what do they do, take them to 5000 feet under a balloon and then drop them?

I was an aircraft owner for twenty years and seldom flew above 2000' MSL.


I owned one for 15 yrs and seldom flew below 3000 FT, home airport was 3180 ft at the low end of the runway As you know John most pilot take off with the mixture set at full rich and don't think about leaning the mixture until their at or above 3000+ft MSL or at there cruising altitude. My point on the 100 LL is that it is very seldom ran at or above 2800 RPM and at sea level where you can make max power in a N/A airplane, it is avation fuel, not race gas


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: AVIATION FUEL? [Re: Cab_Burge] #433523
08/11/09 10:36 PM
08/11/09 10:36 PM
Joined: Oct 2008
Posts: 1,015
Down South
DaKuda Offline
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Have run it for YEARS with no problem. Do not be scared to use it in any way. I had a 340 with TRW domes pistons around 12:1. Ran 110 VP and switched to AvGas 100 from local airport. Ran the excact same time and EVERY number on the timeslip was the same.

Re: AVIATION FUEL? [Re: Cab_Burge] #433524
08/12/09 03:34 PM
08/12/09 03:34 PM
Joined: Jan 2003
Posts: 25,757
Rio Linda, CA
John_Kunkel Offline
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Quote:

it is avation fuel, not race gas




I simply don't agree with the notion that avgas is "designed" for higher altitudes as proven by the full power takeoffs at sea level. It has to work for crop dusters an sea level and tuboed twins at 18K feet.

Nobody said it was race gas or even equivalent but it is suitable for some combinations on the street and strip just like diesel oil is used in cars.


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Re: AVIATION FUEL? [Re: John_Kunkel] #433525
08/12/09 11:53 PM
08/12/09 11:53 PM
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Saskatchewan, Canada
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I like it. My car has 11-1 compression, with the 100LL, I check the plugs occasionally, there are no signs of detonation, or anything unusual. I also use it in my lawn mower, generator, garden tiller, and snowblower. I just love the smell, especially when blowing snow!

Re: AVIATION FUEL? [Re: barracudabob] #433526
08/12/09 11:56 PM
08/12/09 11:56 PM
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Bend,OR USA
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Quote:

I like it. My car has 11-1 compression, with the 100LL, I check the plugs occasionally, there are no signs of detonation, or anything unusual. I also use it in my lawn mower, generator, garden tiller, and snowblower. I just love the smell,


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: AVIATION FUEL? [Re: Cab_Burge] #433527
08/13/09 01:38 AM
08/13/09 01:38 AM
Joined: Aug 2009
Posts: 456
corpus christi tex
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Cheatham Offline
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corpus christi tex
aircraft (piston prop) are 4cycle engines and function the same as our automotive engines, some aircraft engines can use 87 octane auto gas, you have or may have to tune a little to take full advantage of 100ll,aircraft have to lean out at higher altitudes the fuel has to be adequate at sea level as well as at altitude, Its has lead and isnt taxed like auto gas so dont tell a highway patrol man your using it cuz its a big time crime if you get caught with it on the streets. I used it in my 03 hemi pick up and it ran great but the o2sensors dont like it.

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