'13 Yukon XL Denali 2wd 1/4 mile times

Discussion in 'Performance' started by Sangster, Sep 11, 2018.

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  1. Sangster

    Sangster TYF Newbie

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    So my gf and I were bored this past Friday evening so we took the Denali out to Orlando Speedworld 1/4 mile track and made some passes. I was really surprised how well this big old heavy beast did. It went [email protected] with a 2.3 60 ft. Ran the same thing 3 times in a row. It's bone stock except for the Airraid MIT tube. Stock paper filter. This was on 93 octane.

    I was really expecting something closer to 16 seconds. Eventually I'm going to get a BB tune to turn off AFM and unleash some more of the potential. Would be cool to dip into the 14's with just a tune and the intake tube.
     
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  2. swathdiver

    swathdiver Full Access Member

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    The magazines had the short ones with AWD at about 15-flat and 94-95 mph in 2007. I doubt those passes were made in Florida during the summer! With AWD they had the advantage of a harder launch too.

    I ran my 5.3 XL last year with a best 2.52 60 ft and 16.55 @ 85 mph in the 1/4 mile at PBIR. We're going again once it cools off and the skeeters die off. You should have no problem dropping her into the 14s.

    @randeez Randy regularly drag races his Denali and is a wealth of information. Ryan, do you have RPO code AXN by chance?
     
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  3. randeez

    randeez Full Access Member

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    /\ is true...
    Mine was
    15.2 stock/mit iirc
    14.9 after tune
     
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  4. ivin74

    ivin74 05 Yukon Denali

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    Tahoeyukonforum sticker is my only mod and it did 12 seconds flat at Royal Purple Raceway 102 degree weather, LMAO.
     
    Last edited: Sep 12, 2018
  5. justinesky

    justinesky Full Access Member

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    THats a world record. must be 800+ horse unless you are talking about the 1/8 mile then it sounds normal
     
  6. Sangster

    Sangster TYF Newbie

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    Yes, AXN axle code, 3.42 gears

    I cut a 2.3 60 ft every time, no tire spin, just punching it from idle.
     
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  7. swathdiver

    swathdiver Full Access Member

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    Cool, the AXN means you have the 9-1/2" semi-floating rear axle. Randy just put one in his AWD Denali and it's on my list too.

    Up to a point, every tenth you can cut from your short time is double that on the other end. I was spinning too much with a 2000 rpm launch and just chirped the tires with a 1500 rpm launch. Was running 42 psi in the KO2s.
     
  8. Bucky1

    Bucky1 Member

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    I wonder how far you can go gear ratio wise before making a noticable effect on fuel mileage. I belive my 11' awd is a 3.08. That is stifling. So a 3.42 sounds natural. But if you have to change two sets of gears, 3.73 starts sounding better and better. Maybe not good for a vehicle that goes on vacations now and then. I dunno.
     
  9. Sangster

    Sangster TYF Newbie

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    I tried a 1500 rpm launch and it didn't like it, 2.5 60 ft, but still no tire spin. Remember, I don't have a tune on this truck, so all the torque management crap is still in play. I think once I have that, I'll be able to do better. RWD though, so i'll be fighting tire spin too.
     
  10. swathdiver

    swathdiver Full Access Member

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    Yep. Well you can play with air pressure and maybe get the Air Lift Bags and put them in your springs. We use them in our trucks for towing but when I used to drag race, we used them to help launch the cars faster!

    I'll have to try some idle launches then. Had just a tune then and also a bad cat that I didn't know about. Also did 2WD launches only that night. Held off from doing 4WD launches until I reinforced my tie rods with sleeves. However, it turns out they were changed and are now 5/8" thick versus the stock 1/2" thickness.
     

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