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  1. J

    1986 CCC 454 Convert to TBI 454

    I know this is a little old now but are you still looking for 454 TBI stuff? I have a 1990 454 ECM that had the 3l80(has the kickdown calibration) I also have the intake with the aluminum adapter. I also have the exhaust Y pipe. You can have this stuff if you want just let me know. I put a...
  2. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Not anything from me. I sold the burb and the '90 1 ton was a no go-the 454 was toast. I put a small block in it and am just leaving it as is. I do have a 97 c3500 that I might do some stuff with but I'm snowed with so much other crap right now.
  3. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Yes sir! It's worth it just to see how different people respond when I tell them what I've done. Some are intrigued while others shake their heads and some find it blasphemous.
  4. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    8 is great Well it was fun but I was tired of the lack of power so I put the 4 disabled ones back in service. I ran it with 4 for about 1500 miles and there doesn't seem to be any ill effects from doing it. I also just bought a '90 C3500 for $700 that has a tbi 454. Guess what I'm thinking?
  5. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    https://www.youtube.com/watch?v=MpNtASxKDV4
  6. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    O2 volts I did some datalogging yesterday and confirmed in closed loop that O2 voltage cycles up and down between .1 and .9 volts
  7. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    That's a good point however my motor was properly tuned already(new plugs, wires, cap and rotor, etc and timing was correct. 13.5 is what I consistently got on my commute. I have gotten 17 before on highway driving with all 8. I had a 3+ mpg improvement on my commuting so I will get my $4 back...
  8. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Thanks...that's really all it is. My wife hates my burb. If I destroy it, she will be happy :) I am looking at getting a cable now for datalogging.
  9. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Right, it doesn't know I cut half of the air out just like it doesn't know I cut half of the fuel out.
  10. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    I would only need that if I were running both injectors Yes, it's stock.
  11. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    You are very wise, Jim:waytogo: That's exactly what I need to do
  12. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Are you talking about the lobes for the disabled cylinders being "ate out" or the journals?
  13. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    13.5 mpg up to 16.8 mpg is a significant increase for me O2 sensor doesn't look at volume and since there is no extra air being put in...
  14. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    I've never seen one of those on a tbi. I figured the IAC would catch it but it doesn't.
  15. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Definitely better with no a/c! I have to give it a good bit more throttle to maintain the same speed.
  16. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    mpg I couldn't wait for a whole tank so I fueled up at 163.5 miles and got 16.8mpg. It's not that great but is in an improvement over the 13-14 I usually get. There has only been one driveability issue that I've had a couple of times. When idling with the a/c on and max blower in gear the idle...
  17. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    The problem with that is that there is no valving to allow anything to compress in the tank or a place to draw air from. You would need at least two check valves for each dead cylinder with the one allowing air in to be open to the atmosphere. And the other allowing discharge to the tank. Not to...
  18. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    cold start So I just made a cold start video of the burb but unfortunately the fan noise is overwhelming. I can do videos of driving it also as time permits.http://www.youtube.com/watch?v=Rnm1EC4zsXg Sorry about the wrinkled shirt, country accent, etc lol!!
  19. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Yup, in fact I almost scored a complete 1955 235 inline 6(pressurized rod journals) for cheap but I erroneously assumed it would bolt right up to my auto but that is not the case with those early sixes but a 250 would have been great.
  20. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Hey chevy did produce a 3.8 before the 4.3 that has the sbc bolt pattern. That would be an interesting swap. I've only seen a couple of them. I think they were put in late 70s or early 80s malibus and such.
  21. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    I think Hotrod was spot on when he suggested some 4.10 gears for the 4 cylinder. I would do it but I'm cheap. I actually thought about swapping a tbi 4.3 in cause it would be an easy bolt in swap but I never found one on the cheap. I don't believe the 3.4 60deg has the traditional sbc...
  22. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    It's not bad at all. Right off idle it kinda feels like you are lugging the motor a little(it is swinging some dead weight around)but it goes away fast as rpms build. There is no noticeable difference in a steady cruise state.
  23. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    I know for a fact there are passages that tie the left and right side together on the Tbi dual plane intake. Im pretty sure the carb intake is the same as far as where the egr dumps in which ties both sides together.My brake booster gets its vacuum off one of the disabled runners. 1,4,6,7 are...
  24. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    What is compressed just pushes back down. It's how all the late model manufacturers are doing it. I just cant switch mine back without a lil effort. The plugs stay put. You know I'm driving it right? This is my fourth night to drive it to work :)
  25. J

    Disabled 4 cylinders on a TBI motor :) MPG Gain???

    Low, slow, and NOT for show!

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