Question regarding Race Fuel

Discussion in 'Boss 302 and S197 Technical Forum' started by 65venom, Aug 24, 2011.

  1. 65venom

    65venom TMO Intermediate

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    I want to go to the track before the end of summer. I was wondering if anyone has run race fuel (100+ octane) in their new Boss and if so, did it make a difference. I have run it before in older cars without computers but wondered with all the electronics, if the higher octane was needed. Any thoughts are appreciated.

    Thanks
     
  2. VoodooBoss

    VoodooBoss Rick Moderator

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    Not sure about the regular key but TracKey is rumored to make adjustments for up to 100 octane.
     
  3. MrGT5oh

    MrGT5oh TMO Race

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    Personally I would not run a higher octane fuel if it is not needed e.g. experiencing detonation. A higher octane fuel is actually harder to ignite and as a result you could lose horsepower.
     
  4. 2012YellowBoss

    2012YellowBoss TMO Addict

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    I agree but don't know where the line would be for the Coyote engine, I would guess around 95 on the stock tune? Personally I run only only pure gas (non-ethanol) in the Boss, for the street I use 90 since it it all that is available near me. Some of the tracks have 93 and I was thinking in time to mix in a gallon or two of 100. You can try that if you want a little boost.
     
  5. #299

    #299 TMO Intermediate

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    My Boss gets 98 octane all the time here in Sweden ;D

    BUT, it costs 14:50 SEK/Litre....
     
  6. MoscowBoss

    MoscowBoss BOSS 771

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    FYI. Octane numbers in Europe are approximately 4-5 above those in the US and Canada for the same fuel due to the way they figure it......So a 98 in Sweden is about 93-94 in the US.
     
  7. #299

    #299 TMO Intermediate

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  8. 2012YellowBoss

    2012YellowBoss TMO Addict

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    What is you exchange rate to the dollar? The 98, 100 and 112 has been running around $10.50 gallon at the best stations. I remember in Panama the 91 was 87 and 95 was 91.

    By the way I was talking to the guy at CJ Ponyparts and he said a guy from Sweden has been ordering the same parts as I have, told him I knew who he was talking about. He said the ordered did not get finished so you may want to contact Joe there.
     
  9. cholmes1

    cholmes1 Charles

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    Apologies for bringing this thread back from the dead, but I had the same question and given that it has been almost seven years I assume more research and experimentation has been done?

    Thought about running Sunoco 260GT

    • Octane (R+M)/2
      100

    • Research Octane
      105

    • Motor Octane
      95


      Any suspected issues?
     
  10. TymeSlayer

    TymeSlayer Tramps like us, Baby we were born to run...

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    It's hard to find 100 octane around the Denver area but when I head out to High Plains usually mix 91 with the 100 octane I can get there. (About half and half) Next tyme I'm there, I have two 5 gallon jerry cans that I'll fill up for the future. I have never run the car on just 100 octane but have never had any issues running the mix. I'm sure if I did some research, perhaps I could find somewhere closer to the Denver area to get race fuel.
     
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  11. cholmes1

    cholmes1 Charles

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    Thanks. Given the storage life of the prepped Sunoco being ~ 1 year it could be good to have around. Here is a site I am referencing for locations.

    https://www.sunocoracefuels.com/fuel-finder?city=Denver&state=Colorado&zip=80202&fid=&range=300

    This station as 100 octane and many other variants at the pump

    Sinclair Station
    6291 West 58th Avenue

    Arvada, CO 80002

    303-423-3446

    720-214-5726 (fax)

    As an FYI there are no longer any ethanol free fuel stations in the Denver/Front Range area based on calls made yesterday.
     
    Last edited: Dec 22, 2018
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  12. dabossinnne

    dabossinnne TMO Addict

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    I've run Sunoco 100 octane in my Boss with Trackey. Car runs fine on it, but can't say I noticed much difference in power. But it was summer, hot temps, so PCM probably moderated the ignition advance curve. Otherwise I'd surmise you'd get some power benefit from a bit more aggressive curve, but it's probably only on the order of a few HP I'd guess. It'd be interesting to see somebody experiment with this and see dyno results.

    Sunoco 100, here at least, has ethanol in it, so worse fuel mileage. Also, race gas does not contain the additive package of detergents used in street fuel to help keep valves and combustion chambers clean, so extended use of race fuel will likely be detrimental to carbon buildup on valves and such.
     
    Last edited: Jan 7, 2019
  13. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    It cannot hurt your car. If anything, it will protect it while on-track. My local fuel depot has Sunoco 100 at-the-pump and that's all I run in my race car. If you are running on-track, for a street car I'd suggest dumping in 5 gallons of 100 prior to filling your tank with 91 or 93.
     
  14. Bill Pemberton

    Bill Pemberton TMO Addict

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    Good question to ask the Engineers for those of you that come out to the Mustang Roundup ( usually 4-6 engineers come down from Dearborn). Was told by one of them, a few years back, that 93 was what they would recommend at the track. Full blown race cars, recommendation is 98+.
     
    Last edited: Jan 7, 2019
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  15. Black Boss

    Black Boss TMO Addict

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    I believe the GT350 will sense higher (above 93) octane and improve power, but that it's only really noticeably beneficial for higher temperature/humidity ambients?
     
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