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Tbi manifolds

Discussion in 'The Injection Section' started by jamber2541, Aug 5, 2006.

  1. jamber2541

    jamber2541 1/2 ton status

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    Is there a difference between the 87-89 intake manifolds and the 90-91 intake manifolds on K5 small blocks:confused: I want to add a Holley TBI and want to know the difference between the 502-6 and 502-9 part numbers.
     
    Last edited: Aug 5, 2006
  2. sweetk30

    sweetk30 professional hooker Premium Member

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    more than likly just has a.i.r. ports or non a.i.r. ports in manifolds.
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    He's talking intake, not exhaust. :)

    Maybe there was a change in how the EGR valve mounted?
     
  4. btolenti

    btolenti 1/2 ton status

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    I believe the difference is in the IAC and/or TPS used on the throttle bodies. I think the connectors on each sensor changed in 90....
     
  5. jamber2541

    jamber2541 1/2 ton status

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    The reason I asked is because I have a 90 and it has the connectors for the 87 to 89 models. That answers that, what size are the throttle bores supposed to be?
     
  6. sweetk30

    sweetk30 professional hooker Premium Member

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  7. btolenti

    btolenti 1/2 ton status

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    stock bore size should be 1-11/16"

    Both the holley and the 454TBI should be 2"
     
  8. jamber2541

    jamber2541 1/2 ton status

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    thank you all for the info
     

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