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Old 05-17-2011, 01:39 PM
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help with gto

hello my name is 1965tri-gto i'm having ignition timing problems.
fresh rebuilt 389 new protronics dist. starts easy and runs good at low speeds but with any acceleration am getting valve clatter. dist came with 2 extra sets of dist springs. it acts like the advanced is comming in to early. should i try a heaver spring. set timing with vacuum guage to 18 inches

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Old 05-17-2011, 01:55 PM
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Welcome! This is the introductions section, so most members won't see your question. I would suggest posting the question under "Hotrodding Bascis" or "General Rodding Tech". This way, you'll get plenty of responses and help.
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Old 05-17-2011, 04:51 PM
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Moving this to basics
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Old 05-17-2011, 06:34 PM
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sounds like detonation. What heads and pistons are you running?
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Old 05-17-2011, 06:43 PM
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Welcome to the site. X2 on the detonation.

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