softening Lenco shift

Discussion in 'PSI Superchargers Tech Questions' started by overkill69, Jul 12, 2009.

  1. overkill69

    overkill69 Member

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    We just switched from a glide to a Lenco/Bruno 3 spd in a roots blown promod. The car smoked and shook at the 1-2 shift on a marginal track. I'm planning on installing a 72 Holley jet in the airpod for 1-2. Also going to pull some timing out at the shift point. Any suggestions on how to activate the retard. I have a 7531 digital 7 and a Bruno electric shifter that uses msd rpm switches to activate. The msd switches have a 12v output I can use but when it hits the shift rpm on the top end I think it will retard again.

    Thanks
    mike
     
    #1
    overkill69, Jul 12, 2009
  2. Mike Canter

    Mike Canter Top Dragster
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    I think you will find the 72 jet too large. Matt at Lenco said a 50 was a good starting point. If You are going to retard at the shift then you shouldn't need the Holley jet. Tee of the air pod and use a Hobbs switch. The Hobbs switch can then activate a step retard on the Digital 7 and you can ramp it back in. Tim McAmis sells a real nice air activated Hobbs switch.
     
    #2
    Mike Canter, Jul 12, 2009

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