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my last broken engine....(probably not least)
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04-09-2009, 02:35 PM
Post: #7
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Re: my last broken engine....(probably not least)
filh Wrote:As he once tested it before , at about 5500rpm , he found 44° timing advance . Much too much for himWithout the diagnostic plug connected, 44deg BTDC sounds about right so that shouldn't be a problem. See the included advance map from JMR's ECU article. Edit: Also - detonation usually leaves visible dents on the crown of the piston and the combustion chamber. As if someone had hacked the top of the piston with a flat screwdriver. If the piston crown looks good, the problem may be pre-ignition - either caused by a too hot spark plug or glowing carbon deposits. |
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| Messages In This Thread |
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my last broken engine....(probably not least) - filh - 04-07-2009, 10:50 PM
[] - Rasteirinho - 04-07-2009, 11:28 PM
Re: my last broken engine....(probably not least) - firehawk - 04-09-2009 02:35 PM
[] - Rasteirinho - 04-09-2009, 10:50 PM
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