Quote:
Originally Posted by unruhjonny
When properly set up, you should not need to re-adjust, unless your engine is barely streetable.
Every Quadrajet I have set up with correct ect parts has worked flawlessly year round.
(Also notice that my avatar is my car post-paint, in the snow)
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I have to agree with Jonny. There is absolutely no need for a Q Jet with a manual choke IMO. Likely why GM never offered any such option.
After reading Doug Roe's book on modifying Rochester carbs, attending a GM technical school on Q Jets, plus running them on my race cars, as well as street cars, they're the closest thing to driving a computer controlled fuel injected car when adjusted properly, no matter what the ambient air temp is.
Every circle track car I've been involved with the exception of one car, has had Rochester carbs on them. They need little to no adjustments on them once the carb is set up properly. Yes I've tried holley carbs, but have never had any measurable increase in performance over the Rochesters, and a lot more maintenance to keep them in top form than a Rochester based carb.
There is also a lot less possibility for them to leak fuel onto the engine as there are no gaskets keeping fuel in the bowls such as holleys have, lots less possible leak points, and fire potential.
My
, and experiences, YMMV.
