August 25th, 2023, 01:48 AM
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-= Extreme Supporter =-
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Join Date: Jun 2013
Location: Greer, SC
Truck: 1964 GMC 1500 2wd
Age: 69
Posts: 432
Rep Power: 200
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Re: '65 GMC 1500 project. From the Netherlands
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Tried gasoline today, and got the idle right, about 14:1 AFR. The 73 main jets are too large it seems. The AFR gauge went to 10 when transitioning into the main circuit
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and the engine stalled when I let off the throttle. I've set the float level correctly. Probably going to 68's and start there. The power valve opens at 8" HG and the idle vacuum is 15" HG, so right on the money there.
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After all of the intake work on my 305, my main jet is a 71. My truck has a lot more power.
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