Quote:
Originally Posted by leftybass209
Tons of people use Quadrajets and have no issues with them. They get called Quadrajunk by people that don't know how to tune them, so they're pigeon-holed unfairly.
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^^^ This
A Q-Jet properly tuned for the application will make as much power as any Holley, but they're harder to set up. I've seen that comparison done about every 5 years in every car magazine. Usually within 2-3 horsepower either direction.
The difference is that a properly configured Q-Jet will drive like fuel injection, cold start like a dream, idle, and do it all. But they're complicated systems, and not that many people are qualified to set them up correctly.
The factory may have had thousands of hours - maybe more - invested in tuning a Q-Jet to a particular vehicle.
Then someone "rebuilds" a q-jet, only has a few parts left over, it bogs, and so it's a Quadrajunk.
I can rebuild and tune a Holley 3310 (780 cfm) with my eyes closed. But I've never achieved the driveability of a factory-calibrated Q-Jet with all of the driveability components (heat stove, choke, etc) present and working.
Get in, pump twice, drive to other coast. They're that good, done right.