Re: Tuning carb with a Vacuum Gauge
Just got in from gapping the plugs. Wholey crap, what a difference that made. I can't believe the difference in power now.
The carb is a fresh rebuild. I did it.... I had no issues, except that the metering rod measurement was twice what it should be according to the specs on the adjustment table. It did however match the measurement for a 230ci engine. I figured if it ran ok before as it was, I would leave it for now.
I am using a champion copper plug. RN14YC original gap was 0.036" I have now changed it to the 0.045"
When I had the plugs out they looked really good to me.
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1968 GMC truck
910 Trim (Canadian)
127" WB
3 on the Three Trans (Saginaw SM330)
250 ci L6 Engine
HEI ignition (early 80s L6)
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