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TBI setup on a 383?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fortcollinsram, Nov 21, 2001.

  1. fortcollinsram

    fortcollinsram 1/2 ton status

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    I was in the process of designing and engine to build this summer...I currently have a stock 350 with TBI. I would really like to punch the displacement up to 383 c.i. and throw on some better breathing heads...Can my stock TBI unit be modified to run with such a setup? Thanks for the input, Later.
    Peace,
    Chris

    1987 Blazer K5, 4" Rancho Lift, 33" BFG AT, Dual Battery setup, AND MORE TO COME [​IMG]
     
  2. CaptCrunch

    CaptCrunch 1/2 ton status

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    You can do it. I think it is gonna cost some coin. Dispite some peoples love of fuel injection it becomes a nightmare for guys who like to tune and do mods for more power. First of I would forget your stock TBI unit. A 454 unit and and 454 injectors would be a good fit. The cam you choose will be really touchy as well... then of course depending what cam you want to run there are other mods that can be done. Next then you have the cylinder head selection... and after it is all said and done you will need a custom chip to tie it all together and make her purr.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  3. ftn96

    ftn96 1/2 ton status

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    I went through this same design. I talked to everyone. I even drilled Speed-o-motive (supposedly the stroker experts)
    YOu can keep the TBI, HOWEVER, you will HAVE to get a CUstom computer chip made. You will HAVE to get the larger jets for the TBI and yes the cam is pretty important.
    As fas as the heads go, the 383's have to be able to breath.
    So some great flowing 194/150 heads or ok, but the ok flowing 202/160 heads would be better.
    But Like Mikey said, your best bet is to get a 454 TBI unit and then get a cusotm computer chip made, and with a good set of flowing heads you should be ready to rock.
    Hope you got soem money in the bank!!!!

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  4. greg83k5

    greg83k5 1/2 ton status

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    i have also read somewhere that the higher lb/hr injectors from a heavy duty engine can be used to combat trouble...... unfortunately that's all i remember.... did heavy-duty designated engines get different injectors???
     
  5. smack

    smack 1/2 ton status

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    Understanding you'll want to upgrade your electric fuel pump, what about some of the additions at Turbo City?? Like the adjustable regulator and larger bores. With a different chip I'd bet you'd be okay without changing to a 454 TBI. Those mods are what I've heard are recommended if you've installed the crate 350 and still use the "stock" TBI.

    '87 Jimmy
     
  6. solowookie

    solowookie 1/2 ton status

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    oh man... I'd call ASR Engines! I think for around 3 grand they will build you an engine that will be compatible with your stock, thats right stocks chip!

    you can reach them at <a target="_blank" href=http://www.asrengines.com>asrengines.com</a>... I talke to them, and the guy seems really sharp! I believe he can do exactly what he says.

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  7. HarryH3

    HarryH3 1 ton status Author

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    Go to <a target="_blank" href=http://www.turbocity.com>www.turbocity.com</a>, find their phone number and call them. They know what it takes to make a TBI work properly on a 383. Just be ready for sticker shock... [​IMG]

    As for the folks that claim their hopped up engines will work with the stock chip. That's a HUGE pile of BS. You CAN get a modified engine to run, but to get it to run right, then the computer has to know about the changes that have been made to the engine.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  8. fortcollinsram

    fortcollinsram 1/2 ton status

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    Well, thanks for the help guys...I'll make some calls and see what I can dig up myself...I believe that Hyperchip can make me a custom chip to make it work as well...I'll let you guys know when I figure it all out....Later [​IMG]
    Peace,
    Chris

    1987 Blazer K5, 4" Rancho Lift, 33" BFG AT, Dual Battery setup, AND MORE TO COME [​IMG]
     

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