Join Date: Jun 2001
Location: Cedar Rapids, IA
motor not running smooth... fixed
I'm such an idiot.... I have had several posts before with my motor not running smooth. Two local speed shops went through my carb and one replaced the carb going from a Quick Fuel 950 to a Holley 850 and the motor ran alittle better. I replaced almost every electrical part except the MSD 6 AL ignition system. The MSD 6 AL was next to be replaced. I have done a lot of internet research lately and found a few things that I was doing wrong. My motor was to be timed to 36 degrees. I did not know that was the total timing needed to be done at over 3000 rpm. I was doing this 36 degrees at an idle.
I also did not know that the carb needed to be adjusted after the correct timming had been done.
On top of all this, I put new plugs this spring and and gapped them at .045. This is what the auto parts store said to gap them at. Come to find out that they should be between .050 and .060 due to the compression of the motor. I gapped them at .054. After correcting the timing, adjusting the carb and cleaning and gaping the plugs to .054 the motor is running as good as when it came off the dyno. I'm heading to the track next Saturday. I will be putting the 950 back on and will adjust it. I'm hoping to run in the high 10's to an 11 flat.
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67 Camaro, 454, TH400, 9" 4.11's