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Thread: Nasty bangs

  1. #11
    Join Date
    Apr 2009
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    Crafers West South Australia
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    Quote Originally Posted by rick130 View Post
    Curious why you don't like the low resistance ones?

    Too much RFI?
    Low resistance allows the leads to have moments of resonance, resulting in erratic performance at particular RPM and load. Resistive leads have better damping, and inductive leads although in theory better are often too "stiff" to work well especially with LPG. RFI is simply the external aspect of this problem.

    20 years ago I had a particularly nasty little hot weather stumble trying to accelerate off at the lights in my old P76 on gas, and all the usual fixes were applied. It wasn't until I swapped out the relatively new Top Gun leads for the Bosch leads that the problem disappeared forever, leading me to look for a rational explanation. I've since met the problem across a range of vehicles (including D2's and P38's) and high resistance leads generally fixed their problems. Thanks to Mario (Roverlord) for supplying a few sets of OEM leads.

  2. #12
    Join Date
    Jan 1970
    Location
    NSW far north coast
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    Cheers for that.

    My last spark ignition/LPG car was an F100 18 years ago.
    I used Eagle leads as they were local to me and supplied me with leads for the race cars.
    351C running Bosch/Holden HEI and two ranges colder NGK plugs as the CR was stupidly high.
    AFAIK i never had that issue, probably just dumb luck.
    Quote Originally Posted by bee utey View Post
    Low resistance allows the leads to have moments of resonance, resulting in erratic performance at particular RPM and load. Resistive leads have better damping, and inductive leads although in theory better are often too "stiff" to work well especially with LPG. RFI is simply the external aspect of this problem.

    20 years ago I had a particularly nasty little hot weather stumble trying to accelerate off at the lights in my old P76 on gas, and all the usual fixes were applied. It wasn't until I swapped out the relatively new Top Gun leads for the Bosch leads that the problem disappeared forever, leading me to look for a rational explanation. I've since met the problem across a range of vehicles (including D2's and P38's) and high resistance leads generally fixed their problems. Thanks to Mario (Roverlord) for supplying a few sets of OEM leads.

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