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Dropping slower times at drags

Discussion in 'LSx Development and Modification' started by VZSSCHASE, Nov 10, 2017.

  1. VZSSCHASE

    VZSSCHASE Member

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    I need some help on why I seem to lose mph when racing, just recently I have dropped from 117mph doin 11.4s to 113/114mph doin 11.6s in a vz SS 6litre my 60 fts are 1.634, my reaction is around .040 running street ets on 15psi, I just seem to be going down in mph my engine sounds normal and not getting much wheel spin and launches well but I'm at loss on why my mph is dropping when I'm pretty much racing with the same setup, the only mods is a cam and stall with 3.9 gears any help would be appreciated, I'm thinking of doin a compression test but the motor was built early 2015 thanks.
     
  2. immortality

    immortality Moderator Staff Member

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    Could be any number of reasons. Don't just assume it's an engine fault, track conditions, weather and many others can effect the times you run on the day.

    When was the last time you serviced the engine, trans, diff etc? Cover off all the basics before you start digging deeper.
     
  3. gtrboyy

    gtrboyy Active Member

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    Put a gopro on it to record speedo/rev tacho..might help work out if auto or convertor issue & efficiency.

    Go through all basic things first to check all is ok.
     
  4. Deuce

    Deuce Super Stock

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    What was the wind doing on that day?
     

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