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  1. TheBlacksmith

    total BS?

    Do you have to pump at 88 mph?
  2. TheBlacksmith

    Natural Gas Engine

    One of my rules of thumb, for what it's worth; if the thing (engine, cable box, etc.) changes its behavior, for the better or worse, right after you touch something, that something is a likely suspect. In this case, since NEW plugs fix it for 500 hours. Then either the wrong heat range or a...
  3. TheBlacksmith

    Two-stroke cycle engine

    A couple of stories. Some of the early Ski-Doos had very little timing advance and were pull start, with the rope breaking about once a season. Some owners wound the rope backwards and the engines would readily and unknown to the owner start in reverse and back into any inconvenient object...
  4. TheBlacksmith

    Why certain automotive voltages used

    US Navy prohibits anything in excess of 30 volts where it could be touched, such as a broken/cracked pushbutton or changing a broken light bulb. The theory is that the human body resistance can drop as low as 300 ohms; tired, out of shape, sweaty, and 30 volts could result in 0.1 amps of...
  5. TheBlacksmith

    6000 mile oil damage

    Sounds suspicious to me. Cars have been running 205 degree thermostats and 5000 mile oil changes for years. I find it hard to believe that 5 degrees and 1000 miles goes over the cliff.
  6. TheBlacksmith

    Alternator

    Maybe he wants clean power for his stereo ...
  7. TheBlacksmith

    Alternator

    Yes, why do you want to clean it? At automotive voltages dirty winding are not a problem like on a high voltage machine.
  8. TheBlacksmith

    Brake Heat Rejection???

    Hopefully aircraft brakes only see one large heat loading event per flight. Very few people I know try to autocross or drive a mountain road with an airplane. And one of my sports car buddies is an airline pilot but he always brings the ST when we go cruising.
  9. TheBlacksmith

    Brake Heat Rejection???

    "Breaking up the boundary layer" finally clicked for me; I think another way to look at this is that the vanes introduce turbulence. Since the heat transfer mechanism from the rotor to the air is largely through convection, the turbulence makes the heat transfer more effective.
  10. TheBlacksmith

    Brake Heat Rejection???

    Heated brake pads used to off gas and that would try to push the pads off the rotor; holes and slots were made to address pad gassing. Newer pads don't off-gas so much, so holes and slots are primarily for looks while wearing out the pads faster.
  11. TheBlacksmith

    Brake Heat Rejection???

    Isn't this what brake cooling ducts do? By forcing cool air onto the rotor it displaces the hot air. Several guys on the Focus ST forum that autocross have devised wings similar to a Porsche to divert air onto the front rotors. For those unfamiliar with the Focus ST, Ford uses the front...
  12. TheBlacksmith

    compression ratio vs. peak cylinder pressure and thermal efficienty

    In short, sure. Figure in all the other variables, valve and ignition timing, fuel octane, piston and combustion chamber shape and you could approximate the deltas.
  13. TheBlacksmith

    Full Floating vs Semi Floating

    Not to mention the great fun in removing the axle shafts from a friend's full floating rear end and reinstalling the hub caps some late night. Not that I would know anything about that
  14. TheBlacksmith

    flex fuel limitations

    Looks perfect for "short" commutes, say 1/4 mile.
  15. TheBlacksmith

    additives - comments?

    I agree with Ross; Jay is a genuine car guy's guy and I was disappointed to see him in the ads.
  16. TheBlacksmith

    Viewing Window for Engine Test Cells

    I was thinking the same thing; first line of defense is keeping the windows out of the way of rotational planes. A flywheel of connecting rod has so much more mass and kinetic energy than a bullet ...
  17. TheBlacksmith

    fuel additive

    I guess Jay has to do something since giving up that nighttime gig.
  18. TheBlacksmith

    additives - comments?

    There are 100% guaranteed to lighten your wallet. Each and every time. A quality oil should already be properly formulated.
  19. TheBlacksmith

    torque converter sizing

    I'm pretty sure aftermarket manufacturers have programs to determine this, engine size, cam/power range, weight, gear ratio, etc. would all be entering arguments.
  20. TheBlacksmith

    Accelerated Ring Wear

    Yes, a few cars have the "mani-cat," probably to allow for the fastest light off of the cat. So the distance is not as far as a conventional after the Y pipe/under the car setup, but still, the engine sucking the exhaust. Would like to see the bulletin before I push the "I believe" button.

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