2 barrel to 4 barrel conversion

Discussion in '1st Gen DIY' started by Allenrench, Sep 13, 2016.

  1. Allenrench

    Allenrench Junior Member

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    Hi there all.
    I have been debating on converting my 2 barrel carb to a 4 barrel and would like to know what else I would have to convert on my 1990 360.
    Thanks for any input
     
  2. crash68

    crash68 Senior Member

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    90's were fuel injected from the factory. That "2 barrel carb" is the throttle body injection. Unless someone removed all of the electronics and added a carb, why someone would do that only to install a 2 barrel is baffling.
    If your looking for more horsepower, you need a tuner.
     
  3. crazzywolfie

    crazzywolfie Senior Member

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    if everything is working fine you are best to leave it as is and be happy with it. sticking a 4 barrel would likely not gain you anything other than it costing you money. the TBI system that is on the truck would likely create the exact same amount of power as a 4 barrel.

    @crash there is no tuners available for these trucks. there is performance computers available for od1 trucks with magnum engines like my 93 but they are still very limited and not really tuneable.
     
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  4. Jimmy68

    Jimmy68 Senior Member

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    Question: Isn't a 90 an LA engine? My 91 Dakota has a LA 318.
     
  5. crazzywolfie

    crazzywolfie Senior Member

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    yes a 90 would be an LA engine. they used them all the way up till 91 for the 239/318 and 92 for the 360
     
  6. Sniper X

    Sniper X Senior Member

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    IF you have a 2bbl carb, and are not thinking the TBI is a carb, the way to do what you want entails a lot of work. First off to do a 2bbl to 4 bbl swap the right way you really need to go to a hotter cam. Otherwsie a 4 bbl will be no benifit at all and might be a step backwards. Second, on a 90s vintage 318 or 360 a 4 bbl will have to be a small one to work at all. If you still want to do it get a cam made for the chrysler small block that is in the middle of the street strip range and a 500cfm carter carb and a good aluminum intake, and a phenolic spacer.
     

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