08-19-2012, 03:06 PM
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CC Member
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Join Date: Nov 2007
Location: Clayton,
IN
Cobra Make, Engine: ERA 838
Posts: 1,130
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Not Ranked
Stumble off idle -
I have a stroked 428 (447) with a mild cam. It has a holley vac secondary. It runs good, side pipes are tan inside and plugs indicate fuel mixture is about right.
The accelerator pump gives a good shot and both sides are equal. I am pretty certain it is a lean stumble.
The carb had a .031 squirter that I drilled in .002 increments. I am now at .037. The stumble is better but still there.
My gut tells me that I have gone far enough and may be chasing the wrong part.
What squirter size are you running in your setup that is similar? Should I go a few more drill sizes up or change accelerator pump cams?
John
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