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100 octane

Discussion in '2nd Gen. Tacomas (2005-2015)' started by rangejeep, Sep 6, 2008.

  1. Sep 6, 2008 at 11:35 AM
    #1
    rangejeep

    rangejeep [OP] Well-Known Member

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    As anyone used 100 octane fuel in a taco with the 4.0 v6? They call it racing fuel. Texaco down the road sells for $6.99 a gallon if you're wondering.
     
  2. Sep 6, 2008 at 11:41 AM
    #2
    NumNutz

    NumNutz One of the original 7928

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    I took my taco to my local track one day and put 100 in. I got from the airport I fly out of. It is cheaper at the airports but still expensive... like $5.75 was the best I ever saw it.

    I wouldn't use it normally though. Not worth it.

    It will put out a few more hp's but other than that nothing special.
     
  3. Sep 6, 2008 at 11:43 AM
    #3
    WilsonTheDog

    WilsonTheDog Kylie's dad

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    21 gal X $6.99 = $146.79. LOL!

    Great for track use, though.
     
  4. Sep 6, 2008 at 12:00 PM
    #4
    WilsonTheDog

    WilsonTheDog Kylie's dad

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    $7.759 X 21 gal = $162.939. Yikes.
     
  5. Sep 6, 2008 at 2:25 PM
    #5
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    hell yeah!!!! that 112 would clean out the entire fuel system really good!!!:D
     
  6. Sep 6, 2008 at 4:06 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Keep in mind, the higher the octain rating, the lesser specific energy the fuel has. At some point there will be diminishing return. I would think that would be around 95 Oct. for a N/A engine, unless it has a HIGH comp. ratio, i.e. 14-1 or so. JMHO. :)
    FWIW, I ran some 105 oct. in my boosted 2000 Tacoma, and with 32" AT's first gear spun them like I was in neutral. :D
     
  7. Sep 6, 2008 at 4:25 PM
    #7
    shootermcgavinyo

    shootermcgavinyo Well-Known Member

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    On an N/A engine it's pretty much a waste of money and you're not going to notice a difference. Unless your compression and timing are adjusted for it I wouldn't bother.
     
  8. Sep 6, 2008 at 6:54 PM
    #8
    91r100gs

    91r100gs Understand the Voice Within

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    Is the race fuel leaded or unleaded?
     
  9. Sep 6, 2008 at 8:07 PM
    #9
    luk8272

    luk8272 Poodoo

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    Should be unleaded, leaded would cause some problems with prolonged use. Love the smell of race fuel.
     
  10. Sep 6, 2008 at 8:14 PM
    #10
    NHinAK

    NHinAK Active Member

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    I use Sunoco 104 UL with every tank. Runs good.:)
     
  11. Sep 6, 2008 at 8:16 PM
    #11
    WilsonTheDog

    WilsonTheDog Kylie's dad

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    Fat Tuesday on South Street has 190 Octane.
     
  12. Sep 6, 2008 at 8:18 PM
    #12
    NHinAK

    NHinAK Active Member

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    The use of leaded fuel will clog the CATS and sensors. It shouldn't be used. That includes anything "low lead" that you might get at an airport (AVGAS).
     
  13. Sep 7, 2008 at 5:46 AM
    #13
    91r100gs

    91r100gs Understand the Voice Within

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    I asked this question because I have a older Motorcycle that would love a taste of leaded gas. Just a cup full in each tank would really help protect the valves. Have not been able to find any in the KC metro area. If any of the KC members know of a location, that info would be greatly appreciated. Lead substitute just are not the same.
     
  14. Sep 7, 2008 at 8:16 AM
    #14
    Caddmannq

    Caddmannq MotoNerd

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    As Chris mentioned, octane doesn't make power. It just makes gasoline less explosive so it doesn't destroy high compression or radically timed engines. If your engine pings you probably need more octane. If it doesn't you're wasting money buying it.

    The exception, of course, is on engines with electronic knock sensors, and I don't know if the Tacoma has these. Those engines will back off the timing if the engine pings, and so will certainly perform better with more octane (than whatever amount is allowing the engine to ping.).

    In the old days you'd buy high octane once in a while just because it also contained additives that would help clean water and crud from the fuel system. Regular gasolines didn't have them.

    Nowadays, with the wide adoption of fuel injection, I believe that virtually all gasoline sold has some of these additives.

    Anyhow, does anyone know if the Tacomas have electronic knock sensors on the engine?
     
  15. Sep 7, 2008 at 8:32 AM
    #15
    lawnrevenge

    lawnrevenge Well-Known Member

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    taken from geneberg.com
    Looks like Toyota is putting knock sensors in the Camry v6 and the v8 trucks/suvs but not in the Tacoma. My last car (VW GTI 1.8T) had a knock sensor and if I dared run regular it retarded the timing and eliminated almost any boost. Felt like I was driving a low compression POS. But unless I remapped the computer it would not increase boost or timing beyond what it did at premium. It's a huge waste of money unless as said before you're running a blower and can adjust boost and timing.
     
  16. Sep 7, 2008 at 8:32 AM
    #16
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Yes, they do have knock sensors, and the newer 1GR-FE engine sees a good increase in h.p. and Tq. from 91 oct. fuel. Also, Federal requirements for gasoline require that ALL grades and brands of fuel have a min. amount of addatives. In my findings, these requirements negate the use of "Off the shelf" addatives. :)

    Taken from Wiki......The 1GR-FE is the 4.0L version. ....... Output is 236 hp (176 kW) at 5200 rpm with 266 lb·ft (361 N·m) of torque at 4000 rpm on 87 octane, and 239 hp (178 kW) at 5200 rpm with 278 lb·ft (377 N·m) at 3700 rpm on 91 octane.
     
  17. Sep 7, 2008 at 8:42 AM
    #17
    luk8272

    luk8272 Poodoo

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    Thats one of the cheapest and most effective power boost.
     
  18. Sep 7, 2008 at 8:42 AM
    #18
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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  19. Sep 7, 2008 at 8:43 AM
    #19
    Caddmannq

    Caddmannq MotoNerd

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    Hmmm..not that much of an increase really. I kind of doubt I'd notice the difference in my daily driving.
     
  20. Sep 7, 2008 at 8:44 AM
    #20
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Yes it is. :) And in my testing I have ganed 1 to 2.5 mpg depending on driveing conditions. A much better improvement than any CAI I have found.

    *note* I havent tested the URD intake, but have heard from many people that hav them that they DO show a good gain in performance. :)
     
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