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  1. mgithens

    Pressure drop and flow calcs

    by sticking to the lingo, it does eliminate people who might not know what I am referring to... FYI = MMSCFD is the oil field term for Million Standard Cubic Feet per Day.. the M's refer to the roman numeral for 1000... so it is technically 1000 1000 standard cubic feet per day... this is...
  2. mgithens

    connecting rod strength

    ok, I'll restate... Inertial forces are a factor of speed and mass, so either lighten the reciprocating mass (poor reliability, due to the nature of the weaker design by having less material available to structurally support the load that is being distributed over the surface of the piston) OR...
  3. mgithens

    connecting rod strength

    Your connecting rods only feel the effects of inertia on the exhaust stroke. The compression stroke has the cancelling effect of inertia one way and compressive forces in the other, so higher compression won't allow an engine to spin faster - when looking at inertial forces. Inertial forces...
  4. mgithens

    Pressure drop and flow calcs

    We stumbled upon one of those inconslusives... so I was wondering what people are doing to "guesstimate" capacities. Existing 8" line flowing in excess 10 MMSCFD nat gas @ 1050 psi, with a 1/2" tap we are attempting to pull off 2.5 MMSCFD. No this is not by design, but we...
  5. mgithens

    Vacuum Cleaner Attachment Design

    To the best of my recollection, I can't say I have ever seen a vacuum device where the "trash" passes through the "pump". What usually happens is that the filter element is located upstream of the "pump", sort of like the air filter on your car. Something to...
  6. mgithens

    Hybrid Battery Life

    Part of my information comes from people who actually own the car. Some say they can attain the magical high mileage, but the EPA doesn't push the throttle for you. In regular style driving, it is tough to get those posted numbers. (city... highway is strictly speed and load related) My car...
  7. mgithens

    Hybrid Battery Life

    I offer this http://www.europeanhonda.demon.nl/honda_insight_firstdrive.htm maybe not definitive, maybe hearsay... but that seems to be what I had heard. I also remember running across some info that said that the insight's batteries were nothing more than sleeves of D cell or similar...
  8. mgithens

    "Supercharged!" (new book by Corky Bell)

    http://www.amazon.com/exec/obidos/ASIN/0837601681/qid=1015874422/sr=8-1/ref=sr_8_3_1/102-7612954-4023353 I received my copy a few days ago, this book is fairly new. (november '01) So far so good - this is 334 pages of straight knowledge. He compares and contrasts the various types of pumps...
  9. mgithens

    Supercharging and aftercooling...

    Well, I am considering adding a supercharger to my car. My concern is that I already run 10.5:1, so even though people are running this setup, the engineer in me won't let me bolt on what I don't fully understand. I have seen systems with 6psi and some of them have aftercoolers. I am...
  10. mgithens

    Velocity Limitation in Pipe

    According to API RP14E Section 2.2 & 2.3, they say that you should maintain a velocity between 3 and 15 feet/sec. The lower limit is to keep deposit of solids and the upper limit is to control flashing. Twice your speed would be 11.8 ft/sec, or 3.6 m/sec which is within their recommended...
  11. mgithens

    Supercharging and aftercooling...

    I searched for previous posts and didn't find what I was looking for, so I bring my question. After reading up on supercharging and noticing that some cars and systems use an aftercooler to reduce inlet temperatures, I am wondering if an intercooler will reduce horsepower?? AS I UNDERSTAND IT...
  12. mgithens

    Oil filtration

    it is the big chunks that the filters are after. I had a bug with a screen that had holes about 1/16"... I don't believe it stopped much, I never saw anything caught there... :-) I have a '01 BMW and I am almost due for my first oil change at 15,000 miles!!! It seems a little absurd, but...

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