QJet to Holley Help

[vanrah]

Greetings Lelanb & all; You don't need my .02 cents, but here it comes. I'm a Holley guy through & through, buy a 1971 Q-Jet from one of the recommended sources or rebuild yours. Holley's only have a a couple of advantages over a Q-jet, at full on they atomize fuel better & at low engine speeds not as well. And an adapter take that small advantage away. The other advantage is they are less complexed & a little easer to tune. As the front primary rod spring on a Q-jet has to work in unison with the cam vacuum single, that's the tough part of working with a Q-jet. Now the down side of a Holley, if it's too big or tuned poorly when you go to Hammer down the car will fall on it's NOSE, you won't be happy. Take a look at my custom Holley-Proform-Quick Fuel carb & note that it is a vacuum unit. With a heavy car (say 3500 Lbs) & tall rear gear you don't want that secondary opening until the engine is ready, hence NO flat (or no you nose) spot. Sell the Holley or save it for the future when have the correct intake & enough engine & gear to require a Holley. Happy New Year, Bob Jr.

 

[Longroof79]

I too would suggest going with the Q-jet. I have been running a Holley for more years than I can remember. It's been a reliable carb, and extremely easy to service, but if I come across a good rebuildable '70's vintage Q-jet, I will rebuild it and install it.

I also have an assortment of manuals for Holley and Rochester carbs.

 

[EdontheBeach]

Ed, your videos on the quadrajet has helped a bunch of us....thanks..

thanks, buddy...i appreciate that!

 

[Longroof79]

Ed,
I agree with Steve...your videos have been highly informative. Thank you for your contribution.
When I get around to rebuilding my own Q-jet, I will also refer to your video.

 

[L92 OLDS]

X 10 on the Q-jet. Not sure why you would choose a 71 model as a base to work from though......Many 76' and up models are 800 cfm and easier to find. I would look for an 800 cfm mid 70's non CCC Q-jet. Good luck.

 

[L92 OLDS]

X 10 on the Q-jet. Not sure why you would choose a 71 model as a base to work from though......Many 76' and up models are 800 cfm and easier to find. I would look for a mid 70's non CCC Q-jet. Good luck.

 

[EdontheBeach]

Ed,
I agree with Steve...your videos have been highly informative. Thank you for your contribution.
When I get around to rebuilding my own Q-jet, I will also refer to your video.

thanks, Jack!

 

[pontiacgp]

X 10 on the Q-jet. Not sure why you would choose a 71 model as a base to work from though......Many 76' and up models are 800 cfm and easier to find. I would look for an 800 cfm mid 70's non CCC Q-jet. Good luck.

the pre 75 quadrajets use longer primary rods which are not as easy to find as rods for the 75 and up. I have been looking for a 75-78 carb last summer but couldn't find one

 

[lelanb]

well you guys definately convinced me, I'll be selling the holley and ordering a qjet from guarenteed carburetors, my current qjet has hot air choke and no electrical connections at all, not even the fast idle cam ( i've done a little research) so which one or year model would i be buying in particular?

 

[Clone TIE Pilot]

Best to send your original carb to either Cliffs Performance or Sean Murphy Induction. Regardless of what anybody claims, every carb will have to be final adjusted once bolted to your engine, just no way around fine tuning on your engine while it is running.

Here is a good read about the dangers of buying commercially "rebuilt" Qjets from online stores.
http://www.corvetteforum.com/forums...you-can-t-troubleshoot-q-jets-via-forums.html