JDC
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Posts: 570
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posted April 07, 2009 11:28 AM
Advantages of racing fuel?
Could someone please tell me what are the advantagesof / reasons for using 110 octane racing fuel?
  
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Shane661
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posted April 07, 2009 11:36 AM
 Edited By: Shane661 on 7 Apr 2009 19:37
In your case, with a turbo, the advantage is not breaking the motor when you turn up the boost. Same thing with nitrous.
Without a power adder, you are throwing your money away with that much octane...
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JDC
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posted April 07, 2009 11:45 AM
ok, thanks. Anything to worry about if I keep the boost where it is (7 PSI) and use it?
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Shane661
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posted April 07, 2009 11:48 AM
Some racing gas has a tendancy to foul plugs quickly, I've heard. It would really depend on your plug gap and the fuel used. In a high boost application you run a tighter gap; that probably won't apply in your case.
We use C16, but we are running higher boost than you. Maybe someone more experienced will post up as well. I'm not an expert on the subject, I'm afraid.
Shane
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JDC
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posted April 07, 2009 12:12 PM
Thanks Shane.
I just found out the local place for 110 octane has 400 + gallons left, and when gone will not sell it any longer. About $7/gal
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eklipse636
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ZX-14
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posted April 07, 2009 04:09 PM
110 octane here is $10gal... I'm curious to know how long the shelf life is on that.
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8.89 mph 151.32
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dubious
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posted April 07, 2009 05:27 PM
Higher octane aids in preventing detonation.
Not all race fuels are high octane, although the aircraft fuel is.
Some aircraft fuels also have oxygen additive to assit with high altitudes.
Higher octane has higher flash point, which prevent detonation, however it doesn't create more power, it allows you to tune an engine to higher levels.
Power is heat, so the more power you make the higher the combustion chamber temps.
A fuel that will not ignite off the hotter internals, will allow you to tune an engien to make more power without detonation.
This means more boost without need for retarding timing, and allows higher compression, or boost levels
At 7 psi I would not be concerned as long as you have access to premium pump, and a fuel station that has good turnover, so the fuel is not stale.
be forwarned though, I have seen a few 14's burn stock pistons on pump, no timing pulled and 10 psi.
I would pull a few dgree's timing to be safe on pump at more than 7 psi.
ZXbob has had great luck with 6 degree's pulled at 5 psi, and 9-10 psi max on pump.
.
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destiny will overcome intervention.
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Compton
Zone Head
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posted April 07, 2009 07:08 PM
quote:
Without a power adder, you are throwing your money away with that much octane...
depending on the compression.
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b.w.
zx14, little longer, little louder, little lower.
08 Busa, just a little longer and louder and lower than the 14
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1adam12
Expert Class
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posted April 08, 2009 01:30 AM
Back about 15 years ago i would get airplane fuel from a small local airport for my dragbike.It worked fine and was about half the price of race gas. You might want 2 get some of these guys info before u run it but i was told bout the same as race but has anti gel or ice additives for high altittude but ok 2 run except in 2 strokes.
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1adam12
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posted April 08, 2009 01:34 AM
My bike would detonate on pump gas bigbore air cooled gsxr.
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1badzx12r
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posted April 08, 2009 10:07 AM
HEY ha ha all i run is AVGAS LL
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1badzx12r
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posted April 08, 2009 10:09 AM
Edited By: 1badzx12r on 8 Apr 2009 18:09
quote:
Not all race fuels are high octane, although the aircraft fuel is.
Some aircraft fuels also have oxygen additive to assit with high altitudes.
.
WHAT AIRPORT fuel pump i need to visit for the oxygen 100LL
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Wheelie
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Old Man
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posted April 08, 2009 10:10 AM
Edited By: Wheelie on 8 Apr 2009 18:18
quote:
Back about 15 years ago i would get airplane fuel from a small local airport for my dragbike.It worked fine and was about half the price of race gas. You might want 2 get some of these guys info before u run it but i was told bout the same as race but has anti gel or ice additives for high altittude but ok 2 run except in 2 strokes.
isnt 100 octane low lead "avgas" designed for low reving engines?
wee
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Sticks_n_Stones
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posted April 08, 2009 10:49 AM
102 octane avgas works just fine. Used to use it alot in my TL1000R, made another 6hp with it in. My friends 636 made 10 more hp with it. Being aircraft mechanics we knew a little more about it than most though. It's not oxygenated, it has chemicals added to keep it from icing up. Those chemicals tend to create a hotter burn in the chamber, though, so we would mix it 3 to 1 with regular unleaded. Last summer (when gas was $4 a gallon here), avgas was $5 a gallon. Normally it was in the $4 range. To obtain it, grab some gas cans, bring your credit card (they dont accept cash- they're normally self serve), and head onto the airfield.
remember: avgas IS NOT street legal. When you go, just tell them you are fetching gas for your ultralight - or even your race only streetbike. Not that anybody would confront or ask you or even care.
Works good though. After my buddy started running it (and denied making any changes to his bike), his sudden increase in power meant the difference between me being able to pull on him whenever I wanted, to being dead even. I was so pissed at my bike I did a full tuneup, regreased the bearings with low viscosity grease, went back to synthetic oil, new K&N filter, new spark plugs, resynced the throttlebodies, etc..
he finally caved and told me about it, I started using it and things were back to normal: I was faster again. lol
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'06 zx14
Muzzy M10/M14
PCIII w/ Muzzy map
Flies out K&N in!
bits n pieces...
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Shane661
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posted April 08, 2009 11:14 AM
Edited By: Shane661 on 8 Apr 2009 19:15
quote:
My friends 636 made 10 more hp with it.
Wow, that's impressive. $5 gas that adds more power than MR9.
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Sticks_n_Stones
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posted April 08, 2009 11:53 AM
Edited By: Sticks_n_Stones on 8 Apr 2009 19:57
Edit: The hotter burn I was referring to in the combustion chamber was assumed based on the excellerated spark plug wear noted after a couple tanks of pure 102 avgas.
Edit 2: I was running regular unleaded during last falls dyno shootout. Bet I took the question right out of your mouth ehh Gilberjj?  I never noticed any kind of improvement with the zx14 when I ran avgas, so I didnt waste my money after a couple tanks. Bikes seem to be funny that way: certain fuels work well in certain bikes...
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'06 zx14
Muzzy M10/M14
PCIII w/ Muzzy map
Flies out K&N in!
bits n pieces...
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Bawls
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posted April 08, 2009 12:37 PM
The anti icing agent is called prist or fsii . We used to run 100LL in drag banshees because it was cheaper than sonoco 110. Here's a little info on fsii or "prist"
http://www.askacfi.com/80/what-is-prist-and-why-is-it-used.htm
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1badzx12r
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posted April 08, 2009 01:47 PM
Edited By: 1badzx12r on 8 Apr 2009 21:50
all that info is fine bawls but JET Aircraft use JetA .. Prop or combustion engines use 100 LL..
Now i'm not stating that some kind of deicer isn't in 100LL .. but your article retains to turbine or jet engines which use JETA or AKA Kerosene at high altitudes..
I've run 100 LL FOR 1 year and 300 passes ON MY TURBO BIKE ..ON pump gas i lost 2 motors with-in 1 week ...
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Bawls
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posted April 08, 2009 05:04 PM
the anti icing agent is the same either Jet-A (which is JP-5), JET-B(JP-8), or in 100LL which is what you get at the municipal airport. I've had it in both pre-mixed and aerosol form (which we refuse in helicopters). But then again I don't deal with aircraft for a living or anything... so what do I know.
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1badzx12r
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posted April 09, 2009 04:51 AM
me either ..i just know comparing diesel to gas don't work ..thats the way i see jet-a vs 100LL
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