Tuning carb with a Vacuum Gauge - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RyansToy · 10-05-2015, 08:11 PM

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.

10-05-2015, 08:11 PM	#11
RyansToy Registered User Join Date: Aug 2015 Location: Nova Scotia Canada Posts: 145	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. __________________ 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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