TVS 6R80/6MT cars. Where's your shift points?

Discussion in 'Forced Induction - 5.0L V8 Engine' started by Cory S, Feb 24, 2020.

  1. Cory S

    Cory S Well-Known Member

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    My current shifts have been set around 7750. Car hasn't seen the drag strip yet. I was told the fastest TVS cars shift @ 7700-8000. My last dyno session shows power peaking at 6800, and staying pretty flat to about 7400. By looking at the shift recovery in next gear, a targeted shift point of about 7400-7500 would put the RPM's around 5200-5300 rpm. Which is right at peak torque range. Ideal. This is mostly describing a 3rd to 4th shift on a A6/3.15 setup BTW.

    To me, the engine seems to go a little flat and and feels like its just carrying RPM's for nothing after 7500.

    Just don't really want to rev higher, if its not really beneficial. Thoughts/results/opinions?
     
  2. hossman

    hossman Well-Known Member

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    My 17 TVS has a soft limiter at 7500 on the MT-82 with 3.55 gears and I shift around 7300-7400.
     
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  3. 96gt4.6

    96gt4.6 Well-Known Member

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    Stock Whipple stage 1 kit here.

    Shift points are 7800.
     
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  4. GreenS550

    GreenS550 Well-Known Member

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    Shift point is 7800 with the Whipple on my Bullitt if I'm racing. Very rarely does it see this. In my '11 GT with the stage 3 or whatever Roush which I raced repeatedly at the DS MT 82, it turned better times shifting at about 6500 even though it supposedly was safe to 7K.
     
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  5. Burkey

    Burkey Well-Known Member

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    If you have a dyno sheet for your car, you can go here and calculate the optimal shift point for each gear. In its most basic form, you want to shift at whatever rpm gives you the “best average horsepower” for that gear, but as you said, you may need to go past that in order to keep it on the boil in the next one...
    http://glennmessersmith.com/shiftpt.html#data
     
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  6. Burkey

    Burkey Well-Known Member

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    #6 Burkey, Feb 24, 2020
    Last edited: Feb 24, 2020
    I plugged in the numbers for @Patriot Six and his Lund tuned Edelbrock just now and using his dyno sheet, he needs to shift at 7300 in each gear, suggesting to me that if they had continued to rev the car on the dyno, the shift points might be a little higher.
    Food for thought.
    Ignore the final drive and tyre size. They only help to show the ground speed.
    The result is identical for a 15-17 manual D5EC8D04-028A-4763-9189-46349F1BC8F2.jpeg BEAD7076-D9D7-433A-B4B8-7E8739859688.jpeg
     
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