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FI- what year did it start?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Nonesuch, Oct 23, 2001.

  1. Nonesuch

    Nonesuch 1/2 ton status

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    simple and easy...which year K5 was TBI introduced?
     
  2. 55Willy

    55Willy 3/4 ton status

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    I believe 87 was the first year for TBI in all chevy trucks.

    <font color=red>Life is like a mud hole:</font color=red><font color=blue>
    When the S#!T gets deep, you have to keep moving and friends can always pull you out</font color=blue>
    55 Willy's
     
  3. Burbinator

    Burbinator 1/2 ton status

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    Correct...1987 across the board.

    The learning curve is a toll road...ride with someone who has already paid!
    <a target="_blank" href=http://photos.yahoo.com/abshort1>My Naval Fleet</a>
     
  4. ArrowheadK5

    ArrowheadK5 1/2 ton status

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    so EFI was started the same year?? Why did they come out with 2 diff FIs in the same year? is one better?

    Four wheel drive, four wheel expenses...
     
  5. chevrules

    chevrules 1/2 ton status

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    87 was first year for the K5

    chevrules...always has and always will
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    EFI=Electronic Fuel Injection. TPI and TBI both meet that criteria.

    Assuming you are wondering why they had TPI and TBI, partly because of emissions I am sure (cars got TPI for the most part, trucks all TBI then, probably ALL emisssions) as well, the performance and likely clearance issues of the ever smaller underhood clearance of the cars.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  7. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    I think that the biggest reason that TPI didn't make it into the trucks was the cost. Would have been sweet though, they make great torque.

    '85 K5 : Run it til it breaks, then fix it and go again!
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

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    You're answer is much better than mine : )

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  9. Executioner

    Executioner 1/2 ton status

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    Are you talking about 1-3 lbs./ft. of difference from 2-3K rpms ?
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

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    Think you added a one, and forgot a zero www.dorianyeager.com/index2.html
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  11. Thunder

    Thunder 3/4 ton status

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    Food for thought.................
    Its not really fair to compair the TBI and TPI. and say the TPI is better because it makes more power on paper.
    .Even though they were both 350s. The TPI and the TBI engines were mechanically completly different from each other.
    One thing you have to concider when comparing TBI trucks to the TPI in the cars is that the TBI 350 engines were only 8.2 :1 compression ratio.
    The ones in the 350 TPI cars were 9.3 :1&amp; 9.5 :1 Cr. They also ran different cams. That alone will boost the power and torque quite a bit.
    Boost the compression ratio up to 9.5 :1 and put in a better cam and I bet the TBI specs would come very close to the TPI.

    [​IMG]Sometimes nothing's simple and easy on this board.[​IMG]


    <font color=blue>NEVADA: Where the pavement ends, and the West begins.</font color=blue><P ID="edit"><FONT class="small">Edited by Thunder on 10/24/01 05:29 PM.</FONT></P>
     
  12. dyeager535

    dyeager535 1 ton status Premium Member

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    Thats true, cams would have changed. But same year TBI/TPI, same sise motor, same vehicle, both hp/tq were 30 more for TPI. And thats having to meet the same emissions standards, so the motor/vehicle was somehow getting more power while still meeting the same standards. Thats of course assuming running at the ragged edge of "acceptable" emissions. (ASSuME)( Very well could be much better, but that costs money, and GM spending money when they don't HAVE to, well. : )

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     

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