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      04-20-2009, 09:38 AM   #1
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Thoughts on 100 octane fuel for track

Any thoughts on running SUNOCO 260 GT UNLEADED RACING GASOLINE which is 100 octane? I have the Dinan S2 on my 135i and thought I would mix this with 93 Shell V Power and get a little more boost for the 1/4 mile...Thanks for any comments or thoughts.
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      05-01-2009, 09:32 PM   #2
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Unless your car is tuned for it, higher octane will reduce power, since it takes more energy to combust it.
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      05-01-2009, 09:40 PM   #3
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^ my friend ran faster times with a FULLY stock n54 when using race gas
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      05-01-2009, 10:29 PM   #4
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Quote:
Originally Posted by turbobum View Post
Unless your car is tuned for it, higher octane will reduce power, since it takes more energy to combust it.
Ah what? With the higher octane, the ECU will advance timing even more resulting in more power.
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      05-07-2009, 12:57 AM   #5
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We run race gas at the track to net us a greater margin of safety rather than to make more power.

100 octane isn't going to reduce your power, you'll make either more power or the same amount of power depending on what you are doing. Higher octane fuels have a higher detonation resistance and slower flame speeds, both good things.
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      05-07-2009, 02:43 AM   #6
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Personally i run MS 103 Straight at the track. On the street, on an empty tank, i dump a 5 gallon can of MS 109 and fill with 93 oct on a dailey basis
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      03-16-2010, 04:23 AM   #7
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Hey guys you might be able to help me out here. I was at Autobahn today and enquired about High Octane Fuel. I was recommended Wynn's Race Formula which is High Performance Octane Boost. The salesman said it was the best from personal experience. All I do is mix this into fuel tank and I get up to 8 units extra octane rating.

Has anybody used this product and is it safe to use? Here is the link: http://www.wynns.net/retail_raceformula.aspx

I fill up using 98RON here which is equivalent to about 93-93 AKI fuel which you guys use over there.
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      03-16-2010, 07:03 AM   #8
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Don't do it!

http://www.1addicts.com/forums/showt...octane+booster
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      03-16-2010, 09:18 AM   #9
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Thanks for the info guys, lucky I kept my receipt, I'll be returning it in the next few days!!
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      03-18-2010, 08:08 PM   #10
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You could use Toluene as an "octane booster". It's the real deal, as opposed to the BS on the shelf products at Pep Boys.
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      03-19-2010, 12:15 AM   #11
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Quote:
Originally Posted by TrackRat View Post
Toluene is also extremely toxic and is not a good idea to be messing with.
Yeah, if you were thinking of doing a couple shots of it for fun, don't do that. Probably not with regular gas either.

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      03-19-2010, 07:09 AM   #12
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Toluene occurs naturally at low levels in crude oil and is usually produced in the processes of making gasoline...

Mindful of the evil reputation of octane boosters in general, toluene is a very safe choice because it is one of the main octane boosters used by oil companies in producing ordinary gasoline of all grades. Thus if toluene is indeed harmful to your engine as feared, your engine would have disintegrated long, long ago since ordinary pump gasoline can contain as much as 50% aromatic hydrocarbons.

Toluene is a pure hydrocarbon (C7H8). i.e. it contains only hydrogen and carbon atoms. It belongs to a particular category of hydrocarbons called aromatic hydrocarbons. Complete combustion of toluene yields CO2 and H2O. This fact ensures that the entire emission control system such as the catalyst and oxygen sensor of your car is unaffected. There are no metallic compounds (lead, magnesium etc), no nitro compounds and no oxygen atoms in toluene. It is made up of exactly the same ingredients as ordinary gasoline. In fact it is one of the main ingredients of gasoline.

Toluene has a RON octane rating of 121 and a MON rating of 107, leading to a (R+M)/2 rating of 114. (R+M)/2 is how ordinary fuels are rated in the US. Note that toluene has a sensitivity rating of 121-107=14. This compares favorably with alcohols which have sensitivities in the 20-30 range. The more sensitive a fuel is the more its performance degrades under load. Toluene's low sensitivity means that it is an excellent fuel for a heavily loaded engine.

Toluene is denser than ordinary gasoline (0.87 g/mL vs. 0.72-0.74) and contains more energy per unit volume. Thus combustion of toluene leads to more energy being liberated and thus more power generated. This is in contrast to oxygenated octane boosters like ethanol or MTBE which contain less energy per unit volume compared to gasoline. The higher heating value of toluene also means that the exhaust gases contain more kinetic energy, which in turn means that there is more energy to drive turbocharger vanes.

In practical terms this is experienced as a faster onset of turbo boost.
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