Launching

Discussion in 'Generation 4 - Performance Upgrades' started by jtmartin8819, Apr 2, 2020.

  1. jtmartin8819

    jtmartin8819 Member

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    Best way/RPM to launch these cars? Have intake, MAP, and Tune.
     
  2. Zpak

    Zpak Es Aich Oh!

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    H&R’s, AD torque mounts. ;)

    Somewhere between 2,000 and 2,200 RPM, pound or two of boost.
     
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  3. SM105K

    SM105K Streetlight Grand Prix Champ

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    This, with 26 to 28 psi in the front, 40 psi in the rear with traction off.
     
  4. 15SHOPP

    15SHOPP SHO Member

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    Do you guys hold brake & gas @ 2k then launch or hold brake and blip gas to 2k to launch?
     
  5. skyshadow07

    skyshadow07 On a mission to get below 4000lbs

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    I hold brake, start giving gas until I see RPM and such I want then release brake as I floor gas.
     
  6. jman1200

    jman1200 SHO Member

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    All of the above. I've tried 2500 rpm launchs and torque management shuts me down, 2-2.2 is the sweet spot.
     
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  7. 802SHO

    802SHO FULL SEND

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    Yes yes yes but sometimes.....sometimes.....at a certain point.....in your progression of power......do you actually get faster....by launching with traction control ON. Try both with Dragy. The results might surprise you.
     
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  8. SM105K

    SM105K Streetlight Grand Prix Champ

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    Everytime I launch hard with traction on, it hangs first gear. With traction off, never.
     
  9. Zpak

    Zpak Es Aich Oh!

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    With traction on I launch with,
    Car- “brake brake easy! wait, brake... and go.”
     
  10. 802SHO

    802SHO FULL SEND

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    I have only tried it once, my time was faster with traction ON when I experimented although on separate roads. But as I look back the slope % of the road was +1.75% for the faster time with traction on and the slower time with traction off was a slope of +2.84%. As that being my only experiment, considering the sharper incline slope of the slower time I'll have to call this inconclusive.

    Need more tests. Screenshot_20200404-073814.png Screenshot_20200404-073758.png
     
    Last edited: Apr 4, 2020
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  11. Jordan_R

    Jordan_R Stock Block Ready To Knock...er..Rock

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    I've always ran faster with traction control on. Best of 11.08 with 50 shot and best with traction control off was 11.11 however with a 75 shot. So power difference helped the 11.11 quite a bit.

    How I launch however normally is I started with traction control on, 2000 rpm brake boost and let it rip. See sixty foot and increase or lower PSI depending if really good sixty or really bad sixty. I usually keep rear tires 32ish and don't adjust rears because likeliness to spin is not happening in the rears. Also can adjust launch RPM depending on the sixty, but I usually stick to the same launch rpm.

    You want to find the happy medium between traction and overall PSI in the tires because rolling resistance down the strip is also a thing we need to account for. So optimizing sixty, but not over doing traction is the happy medium you want to find.

    Also like stated above Anthony DiCunzolo's trans mounts help tremendously off the line then into the 1-2 shift. Used to have crazy 1-2 wheel hop before I put on his trans mounts. Even to the point where the car would be like nope fuck you I am taking it out of gear and you are going to free rev.
     
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  12. jtmartin8819

    jtmartin8819 Member

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    Where can I find these trans mounts?
     
  13. Zpak

    Zpak Es Aich Oh!

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  14. jtmartin8819

    jtmartin8819 Member

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