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new here 92 tbi 350 to carb conversion

Discussion in 'The Garage' started by 77scottsdale, Dec 21, 2006.

  1. 77scottsdale

    77scottsdale Registered Member

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    i iam putting a 92 350 in my 77 k10 4x4 short bed , will it be a good engine for a 4wd being that it has the swirlport heads, planing on headers, performer intake, 600 double pumper holley, and a summit cam 262/272duration, .420 .442 lift. plan on running this engine till i get my fourbolt motor where i wont it (383)
     
  2. Corey 78K5

    Corey 78K5 1 ton status

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    I put a 92 350 in my 78 K5. I used a performer intake and had to modify the 4 center bolt holes to compensate for the different angle of the bolt holes on the TBI heads. I also had to go with an electric fuel pump since a 92 wont accept a mechanical fuel pump. I think the pump cost like $26 at napa. The power is decent for what it is.
     
  3. sweetk30

    sweetk30 professional hooker Premium Member

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    i wouldnt run that holley in a offroad truck at all.
     
  4. Jason4x4

    Jason4x4 1/2 ton status

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    you can but the manifold with the correct center holes so you don't have to modify, i just got rid of one, but i've seen em on ebay for about 80 bucks
     
  5. trailblazr81

    trailblazr81 1/2 ton status

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    Run a Q-Jet or off road Holley, the 600 DP will stall the engine off-road at angles and just hitting bumps. Ive seen 'em stall while just going down rough dirt roads. Best would be to keep and run the TBI set-up. It can be easilly modded to make and handle more power and would be better than carb off-road, for fuel mileage, and throttle response.
     
  6. 77scottsdale

    77scottsdale Registered Member

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    reason iam running the carb is because i dont wont to spend any money on a new one my dad bought this 600dp in 05 and its almost new, and its free to me. i hope it will de fine for a couple of mud runs and a few trails along the way, not going to go on any hard step trails till i get it lifted up some

    what psi electric fuel pump do i need for a carb, i saw a 4 to 6 psi carter at summit for 65.95
     
  7. 77scottsdale

    77scottsdale Registered Member

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    also i just bought some off-road needle and seats that are spring loaded,
     
  8. BizeeB65

    BizeeB65 1/2 ton status

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    you will be sorry you ditched the TBI once you get in an off-camber situation and your carb floods the engine. Spring loaded needles and seats help.... a little. I am going the opposite way you are... I have a 600cfm edelbrock with spring loaded needles and seats, and I still cant do hillclimbs without stalling. So I picked up a complete TBI system that is getting swapped in.

    Good luck with the carb thought. If you can get access to a q-jet, you may have better luck, as I hear they run on thier sides! :eek1:
     
  9. trailblazr81

    trailblazr81 1/2 ton status

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    The carter electric pump will be ok for your mild mill. And make sure you have the right intake for the TBI heads.
     
  10. BlaKK54Speed

    BlaKK54Speed 1/2 ton status

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    ok im lost, some one tell me what TBI is? im not a chevy guy by trade
     
  11. mouse

    mouse 1/2 ton status

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    Throttle Body Injection
     
  12. trailblazr81

    trailblazr81 1/2 ton status

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    Throttle Body Injection. On these models it looked similar to a carb but was a 2 barrell unit with 2 computer controlled injectors. Better cold starts, mileage and throttle response, and better off road. I think it was 200 HP at 4000 RPM and 310 pounds torque at 2400 RPM. With a few mods, headers n exhaust and a chip and you could probly get 250 HP. My next rig will be a TBI Blazer.

    [​IMG]
     
  13. Mr.Jimmy

    Mr.Jimmy Registered Member

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    I bought an 88 burb just for the tbi stuff. ripping off carb stuff. let me konw if you want any of this crap.
     
  14. 77scottsdale

    77scottsdale Registered Member

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    how many post do i need to look at attachments
     
  15. Mr.Jimmy

    Mr.Jimmy Registered Member

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    pretty sure you need to purchase a membership
     
  16. rcamacho

    rcamacho 1/2 ton status

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    Holley mods

    Success varies for everyone a bit. I run a holley 780 vacum secondary with no problems on large hillclimbs or side angles. It has center hung fuel bowls that I've retrofit with whistle baffles front/rear, spring loaded needles and and extended vents. No issues so far.
     
  17. Mr.Jimmy

    Mr.Jimmy Registered Member

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    no carb will give you crisp throttle response, let you run at the leanest possible air/ fuel mixture, and forget a steep hill, fuel injection will run upside down! my truck runs rich as hell and without re-jetting it, it blows black smoke. soon as i get a computer chip, im slappin on tbi.
     
  18. 77scottsdale

    77scottsdale Registered Member

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    tbi is not really that much better than a carb you will spend around 250 300 for a chip plus what ever you have to pay for a good tbi setup, plus new injectors, ill stick with the carb
     
  19. 77scottsdale

    77scottsdale Registered Member

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    if your going to go fuel injection go with a holley kit, or edelbrock mpi
     
  20. 77scottsdale

    77scottsdale Registered Member

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    here is a link to some pics here


    any one know of any good k10 fourms
     
    Last edited: Dec 29, 2006

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