Lenco input pick up

Discussion in 'PSI Superchargers Tech Questions' started by Big Russ, May 25, 2006.

  1. Big Russ

    Big Russ Member

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    Hi Guys

    What is the best way to read input shaft speed on my Lenco??

    Does anyone make a collar for the input shaft?? It looks as though there is enough room there if I space out the candlestick about 10mm.

    Is the sensor going to live inside the clutch can???

    Is there an easy way to do this??

    Appreciate the help.

    Cheers
    Russ
     
    #1
    Big Russ, May 25, 2006
  2. DQUES

    DQUES Member

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    I am not sure but I thought someone made a candle stick that had a sensor mount in it .
     
    #2
    DQUES, May 25, 2006
  3. Dale Finch

    Dale Finch Member

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    Input Sensor

    talk to Ron at Racepak. they make a special candle stick set up and can modify your input shaft with a magnetic to trigger the sensor
     
    #3
    Dale Finch, May 25, 2006
  4. Tim Stevens

    Tim Stevens new

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    Call Matt at Lenco, I know they have them, I use one! About your question of the sensor "living" in that enviroment, we have had problems, Try to keep things clean and air gap adjusted between shaft and pick-up and good luck!
     
    #4
    Tim Stevens, May 26, 2006
  5. Witchdoctor

    Witchdoctor Member

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    Tim Mcamis also sells one
     
    #5
    Witchdoctor, May 26, 2006
  6. Nathan Sitko - 625 TAD/TAFC

    Nathan Sitko - 625 TAD/TAFC TAD / TAFC

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    Bought our candlestick through Atchison racing, they're the Canadian dealer for Lenco. Make sure you tie strap that cord from the sensor tightly, otherwise the clutch will suck the cord in. We put one in this year and haven't had a problem with it.

    If you decide to use a magnet in the shaft, you're going to have to drill the hole with a carbide drill bit - very carefully - but it can be done. We drilled the hole for the magnet in ours and a couple other teams up here, just be sure you don't break that bit in there or you'll be sorry lol.
     
    #6
    Nathan Sitko - 625 TAD/TAFC, May 26, 2006
  7. Mike Canter

    Mike Canter Top Dragster
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    As a note here. You need to be careful as to what type of pickup you use. Most pickups require that the magnets inserted in the input shaft alternate in polarity. If you use two magnets 180* out then one needs "N" up and the other needs "S" up.If you use four magnets then they would go N, S, N, S. You can check what you already have in the shaft by using a compass and see which way the needle points as you turn the shaft on a bench. Remember opposites attract.

    If you are installing magnets into the holes then let two magnets lock together in your hand. Now mark with a Sharpie the outside sides of each of the two magnets which will be opposite poles and install them both with the marked sides facing out.

    I found it best not to use an epoxy like JB Weld to hold the magnets because it contains metal particles that will cluster on top of the magnets and dry hard. I use a clear two part Locktite epoxy and have never had a problem.
     
    #7
    Mike Canter, May 26, 2006
  8. bryanbrown

    bryanbrown Member

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    why would you need to read the input shaft speed and (I assume), the driveshaft speed? Is there slippage?

    bryan brown
     
    #8
    bryanbrown, May 26, 2006
  9. Mike Canter

    Mike Canter Top Dragster
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    For clutch tuning. If you use the driveshaft speed then you have to compute through the gear ratio that the tranny was in. Most data loggers have a feature that uses just engine rpm and driveshaft rpm and can compute the gear ratio and show the clutch slippage but it is hard to really know what is going on. With the Lenco input shaft speed sensor you can pictorial show the clutch relationship directly to the engine rpm. It makes it a whole lot easier to tune.
     
    #9
    Mike Canter, May 26, 2006
  10. Nathan Sitko - 625 TAD/TAFC

    Nathan Sitko - 625 TAD/TAFC TAD / TAFC

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    Bryan,

    You read the input shaft speed as a comparison to the driveshaft speed to see clutch slippage, when it locks up, etc, etc.
     
    #10
    Nathan Sitko - 625 TAD/TAFC, May 26, 2006
  11. Big Russ

    Big Russ Member

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    Thanks guys

    I appreciate your advice.

    Mike, Thanks for the hot tip on polarity of the magnets - I never would have thought of that.

    Cheers
    Russ
     
    #11
    Big Russ, May 26, 2006
  12. Sandracer695

    Sandracer695 Member

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    Lenco pick up

    Big Russ, I have a imputshaft, candlestick, and racepak pickup sensor for a lenco trans for sale. My number is 559-287-0952 Joe
     
    #12
    Sandracer695, May 27, 2006
  13. smokinboyz

    smokinboyz Member

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    just checking

    so if i put one pickup on the imput/candlestick and one on the pinion near the coupler i should be in the ball park , one more question whwre do you run the wire out of the can?......peter
     
    #13
    smokinboyz, Nov 12, 2007
  14. Nathan Sitko - 625 TAD/TAFC

    Nathan Sitko - 625 TAD/TAFC TAD / TAFC

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    We just run it out of the bottom vent tube.
     
    #14
    Nathan Sitko - 625 TAD/TAFC, Nov 12, 2007

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