Relay needed for trans brake on Quick drive or Lenco drive?

Discussion in 'PSI Superchargers Tech Questions' started by Soldierboy0098, Jul 12, 2017.

  1. Soldierboy0098

    Soldierboy0098 Active Member

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    Hi Wondering if I need a relay to activate my trans brake as opposed to just running my little ART micro switch straight to the trans brake? I did it without a relay on my dragster and held it for about 10 seconds and it seemed fine. Thoughts?

    Thanks,
    Trevor Sherwood
     
    #1
    Soldierboy0098, Jul 12, 2017
  2. jay70cuda

    jay70cuda Well-Known Member

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    I haven't I installed my quick drive yet but was told just a button is fine. The less wiring the better. I've also heard that Lenco drives and Bruno's are very touchy with wiring.
     
    #2
    jay70cuda, Jul 13, 2017
  3. Mike Canter

    Mike Canter Top Dragster
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    If you can get away without one then do it. Regular relays will slow down your reaction time and are not consistent. If you have to have one then use Shannon Davis solid state on. Moretraction.com
     
    #3
    Mike Canter, Jul 13, 2017
  4. Jason Green

    Jason Green Member

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    I agree with Mike, if you can run without it then do, just keep a spare button because sooner or later the contacts will get burnt and that will cause you some headache.
     
    #4
    Jason Green, Jul 13, 2017
  5. hotrod796

    hotrod796 New Member

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    I use a switch only for a LencoDrive, I believe it's made by Dedenbear. As long as it's rated for 25 amps you're good.
     
    #5
    hotrod796, Jul 14, 2017
  6. superpro453

    superpro453 Member

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    Check the voltage drop at the transmission end. If it drops below the manufacturer's recommendation, you might need to run a relay (we had to on our Lencodrive).
     
    #6
    superpro453, Jul 17, 2017
  7. Mike Canter

    Mike Canter Top Dragster
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    Use a larger gauge wire if the voltage drops too much. Stay away from a relay unless you love inconsistent reaction times
     
    #7
    Mike Canter, Jul 18, 2017
  8. jay70cuda

    jay70cuda Well-Known Member

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    What he just said^^^^^^^^^^!! Relays are like hot girl friends. Great at first then nothing but trouble in the end lol
     
    #8
    jay70cuda, Jul 18, 2017
  9. superpro453

    superpro453 Member

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    We didn't have anything larger than 10 gauge to hand (unless you count the battery leads)... but as I footbrake the car from idle, I guess I'm not bothered about consistency in the TB - more concerned that the car would creep with the TB on - not good when you use the TB to go from forward->reverse or back (we've broken more than enough reversers).
     
    #9
    superpro453, Jul 18, 2017

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