04-01-2011, 06:45 AM
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CC Member
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Join Date: Nov 2009
Location: Stuttgart,
GE
Cobra Make, Engine: ERA #539/427 Holman Moody #7HM20 from 1967
Posts: 92
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Not Ranked
Linkage adjustment on QFT/Holley two fours
Question: what is a good start on adjusting /tuning the slotted opening of the second carb primaries coming into play. They are the Survival Motorsports/ QFT vintage carbs.
First quarter, Midway or last quarter of the slot?
What is a good start??
427, 282S, RPM heads, 10.3:1, Street driving but do not need it leaning out at partial throttle 90-100 mph with 3:54 at about 3,000 rpms.
I guess I am answering my own question as I type, leading to the fuel/air mix FAST tool and welding bungs in the side pipes to really get the answer without holing pistons.
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