"Thunder" 1996 K3500 crew cab 4x4

Discussion in 'Member Trucks' started by TKerr, Dec 7, 2017.

  1. TKerr

    TKerr Supporting Member

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    I can not use a stock TPS or IAC due to it being a mercruiser intake. GM built intake and sensors but designed specifically for Mercruiser racing. But I am thinking about having an adapter plate made to use a 102mm LS style throttle body and seeing what it would take to switch to speed density from mass air.
    This build has definitely taken on a life of its own. And with that comes a lot of unexpected cost. But in the end I will have a fun one of a kind build.
    I am leaning to tuning it my self, waiting to hear back from Black Bear Performance.
     
  2. Christian Steffen

    Christian Steffen I'm Awesome

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    SD would probably be fairly easy, just need a map sensor, iat, and tps. I'm a little confused where the tps mounts on this, I thought it would be in the throttle body. Any pics?
     
  3. TKerr

    TKerr Supporting Member

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    TPS is on the throttle body, but it is a mercruiser throttle bottle and TPS mount is milled to only be able to use a mercruiser TPS which cost more.
    That is why I am trying to find a fab company that can make an adapter to use an LS Throttle body. Have not had any luck as of yet.

    Ideally using the GM ram jet throttle body would be the most Ideal as it is a standard TPS. But GM does not sell it individually and the ones I have found are extremely overpriced.

    I am sure if I did more research I could make this setup work, mercury racing is not very helpful and are reluctant to give out sensor parameters. My biggest concern is what information I have recieved says the potentiometer has different ohm valves due to it is designed for race boat applications.
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  4. Christian Steffen

    Christian Steffen I'm Awesome

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    Oh I gotcha now.. yeah I would think that making an LS throttle body adapter would be the best option.
     
  5. Casey1104

    Casey1104 Newbie

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    What are you going to be doing with your old bumper i might be able to have someone pick it up
     
  6. TKerr

    TKerr Supporting Member

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    Keeping it on the truck
     
  7. Beeffajitas

    Beeffajitas Newbie

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    I'm not sure if you can adjust TPS parameters in a 411 ECU, through tuning software, BUT the aftermarket stuff you can. Then you wouldn't need to mess around with the TB.
     
  8. TKerr

    TKerr Supporting Member

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    Update on the truck the 509 is being built now and project is moving forward. I have started a 509 build thread separate from this one. During a race with a 2018 f350 diesel I refused to lose and the decision was detrimental to the 7.4l. I won, but at cost that was worth it.
     
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