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Recent content by livingwater

  1. livingwater

    Low cost manufacturing of gears

    MATTRR, I used to work with the row units on the Case Cotton Picker. Most of the gears we had were forged plates with the teeth cut in after normalizing. They were heat treated after that to handle th required forces. We did have one gear that was about 2 inch diameter that was powdered...
  2. livingwater

    Ethanol

    Wichita just opened it's second E85 (85% ethanol) gas pump. I have written to GM, without a definitive answer. Can I burn E85 in a 1994 Suburban with the TBI 350 motor? I don't really see where that would be an issue, but I don't specialize in Internal Combustion either.
  3. livingwater

    Venturi Flow Rates

    Jimmy, For the 670 CFM throttle body (2 inch bores), I came up with a flow of 184268.6 in/min = 256 ft/sec For the 400 CFM throttle body (1.6875 inch bores), I came up with a flow of 154492.6 in/min = 214.5 ft/sec
  4. livingwater

    Venturi Flow Rates

    Anyone have any idea how carb companies calculate flow rates? I took the two throttle bodies that Holley markets to GM TBI users, and calculated backwards from their rated number (CFM) to air velocity based on the area the air has to go through. It seemed like a reasonable idea, until I came...
  5. livingwater

    Need for EGR?

    Guys, Thanks for continuing to throw things in on this. My wife has a '94 Suburban, and it's my first dealings with EGR, per se. My 84 Ford pickup had a Carter Feedback carb on the 300 -I6 engine. It had some kind of exhaust feedback into the carb itself. I suppose it was somewhat of a good...
  6. livingwater

    Pros and Cons of low-profile tires?

    Retracnic, Stability should be a benefit. Not sure why some others are saying bigger rims are heavier, Larger diameter rims with same OD tires (lower AR), should reduce your unsprung weight. The mass of aluminum used to increase the diameter of the wheel will be considerably less than the...
  7. livingwater

    Need for EGR?

    My understanding of the need for the EGR valve is as emission "fooler" only. I realize that introducing the exhaust gas will reduce NOX. Can't the ECU get emissions under control by simply using the feedback from the O2 sensor, along with it's other parameters? From looking at the...
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