Rates Of Engine Acceleration

Discussion in 'PSI Superchargers Tech Questions' started by TOL, Aug 29, 2013.

  1. TOL

    TOL Active Member

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    I wonder if someone could help out with a couple of real world numbers for typical rates of engine acceleration? (ie: max rate of change in RPM per second while under load and when the clutch/tires/converter are reasonably loaded).

    I'd be curious to know typical numbers for 1) blown alcohol funny or pro mod, and also 2) blown nitro funny or dragster.

    Thanks for your help.
     
    #1
    TOL, Aug 29, 2013
  2. Mike Canter

    Mike Canter Top Dragster
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    FC is 1508 rpm per second from launch to the shift point in first gear.

    PM is 2000 rpm per second from launch to the shift point in first gear
     
    #2
    Mike Canter, Aug 30, 2013
  3. Mark Leigh

    Mark Leigh Member

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    Mike , to clarify this for me, what point on the RPM graph are you picking up these numbers from ?
     
    #3
    Mark Leigh, Aug 30, 2013
  4. Mike Canter

    Mike Canter Top Dragster
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    Why is that? Took it from launch to top of first gear on both types of cars.
     
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    Mike Canter, Aug 30, 2013
  5. TOL

    TOL Active Member

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    Thanks Mike. What are things like in 2nd and 3rd gear for those two cars while under load and against the aero?
     
    #5
    TOL, Aug 30, 2013
  6. aj481x

    aj481x Member

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    P/M on the chip 4000 rpm, shift at 9500 1.35 sec, 7800 at 1.65 shift 9800 2.7 sec, 7800 at 3.05 sec finish line 9327 5.99 sec, 238 mph. None of these are linear, third gear is close.

    If it helps, we dyno at 600/sec
     
    #6
    aj481x, Aug 30, 2013

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