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Old 12-13-2002, 03:55 PM
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Post GENERAL MOTORS

DOES ANYONE NO A PHONE NUMBER FOR GENERAL MOTORS THAT YOU CAN ACTUALLY TALK WITH SOMEONE ABOUT ONE OF THEIR PRODUCTS. IF MY CRATE MOTORS PIPES ARE GLOWING AFTER FOLLOWING ALL THEIR INSTRUCTIONS ON IT, THEY SHOULD HAVE THE ANSWER. I'M BEAT TRYIN TO FIGURE THIS ONE OUT. THANKS

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Old 12-13-2002, 08:43 PM
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This is common on new engines. most people think there running too lean so they richen the mixture and the headers glow more. when sitting still there`s no air flowing around the headers, heat collects into them until they glow. A simple experiment you can do is, use the pump shot on your carb, set the engine speed to around 2000 rpm, when the headers start to glow, use the pump shot to pump in more fuel, this way your don`t have to move the carbs throttle, if the glowing intensifies, it`s already too rich, if the glowing gets less, it`s too lean, I`m thinking you`ve already done a plug check and checked the spark timing. your carb could already be close as possible to correctly set and they`ll still glow due to no air flow.
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Old 12-13-2002, 09:25 PM
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Great tip, but if I remember right, his motor is on an airboat....plenty of airflow I figure.
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Old 12-14-2002, 06:08 AM
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[ December 14, 2002: Message edited by: TurboS10 ]</p>
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Old 12-14-2002, 04:52 PM
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this is a carburated engine right would it be a consideration the choke is not opening completely with a lean run causeing a glow.i say lean because thats what to much fuel with not enough air to push gasses out of pipes. but to rich,

[ December 14, 2002: Message edited by: rooster ]</p>
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Old 12-14-2002, 05:29 PM
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No, the choke not fully opening would cause a rich condition due to less air and more fuel. lean is the opposite.
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Old 12-14-2002, 06:56 PM
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Headers glowing on cam break in is normal. As a matter of fact the new Hedman's I just got with the HTC coating has a warning on them that says to use the stock manifolds or old headers for cam break in and not their Ceramic coated beauties as this will void their lifetime warrenty on the Coating!
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Old 12-14-2002, 06:58 PM
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[ December 14, 2002: Message edited by: zachscc ]</p>
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