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I want some help installing the below new carburator from a vacuum lines perspective. My engine is a 1968 327 Chevy engine, which is installed in my 1975 C3.
the previous carburator had a vacuum line coming out of the manifold passenger valve cover and a Vacuum advance from the HEI distributor.
Can you let me know where I should connect these lines and if I need to add any new lines? Also should unused vacuum lines be blocked off?
I want some help installing the below new carburator from a vacuum lines perspective. My engine is a 1968 327 Chevy engine, which is installed in my 1975 C3.
the previous carburator had a vacuum line coming out of the manifold passenger valve cover and a Vacuum advance from the HEI distributor.
Can you let me know where I should connect these lines and if I need to add any new lines? Also should unused vacuum lines be blocked off?
Thank you!
You can leave the unused vacuum lines open and see if you can play a tune when they are whistling - joke OK ?
Am not sure with your post numbers if you are for "real" ??
If you are for real - I will defer to the nice helpful people on the forum to help you with this hodge podge
Hello and welcome to the forum.
68 327 engine, that's a good thing.
Horrible carburetor made in China. Not so good.
Yes just leave the rubber caps on unused vacuum line connections .
Can you actually get your car to run properly with that hunk of scrap metal? Maybe, I hear it's hit and miss.
From: At my Bar drinking and wrenching in Lafayette Colorado
Use that carb to practice your hook shots into your garage trash can and save yourself the time to install it or attempt to set it up. See my article referenced above about that carb. Pure junk. Find a good, unmolested, rebuildable used carb and have it set up well.
OP, there is no one more knowledgeable than Lars when it comes to Quadrajets. He can be colorful but take what he says to the bank. You will be infinitely ahead of the game.
He is also incredibly generous with his time. Email him at V8FASTCARS@MSN.COM.
What happened to your original 1968 carb ?
Hopefully it might be a 4bbl carb - the original Q'jet ?
If you have it consider yourself VERY lucky and send it to Lars up above to rebuild it for you.
If you should be so fortunate to have it and it's a 4 bbl it will make things SO MUCH easier as to vacuum lines etc etc .
Hi all, thank you for all the replies. We managed to set it up and she is now running well!
Managed to find all the vacuums that needed to be connected or left open. Used a vacuum gauge to set up the idle mixture to peak vacuum, and all is running well. The secondaries tension screw needed a bit of a setting, and is also opening well.
In the meantime, I will also service the original Quadrajet Carb S/N 7028212, to get that running as well!
What do you all think about purchasing a rebuild kit from the Quadrajet Power website?
Hi all, thank you for all the replies. We managed to set it up and she is now running well!
Managed to find all the vacuums that needed to be connected or left open. Used a vacuum gauge to set up the idle mixture to peak vacuum, and all is running well. The secondaries tension screw needed a bit of a setting, and is also opening well.
In the meantime, I will also service the original Quadrajet Carb S/N 7028212, to get that running as well!
What do you all think about purchasing a rebuild kit from the Quadrajet Power website?
Thanks!
I followed that exact process. I used the cheap carburetor for a fill in while I rebuilt my Quadrajet. I bought a rebuild kit from Quadrajet Power, it was a decent kit. I also had my base plate rebuilt to eliminate vacuum leaks.
Congrats on getting that "new" Q-jet operational. Yes, your best alternative is to properly rebuild the original unit. If you want it done perfectly, send it to Lars for rebuilding (contact for info at e-mail address above).
Quadrajet Carburator Installation
