carb
November 1st, 2021, 05:05 PM
#1
Registered User
Thread Starter
Join Date: Feb 2012
Location: billings mt
Posts: 44
carb
67 supreme, all stock original. original carb is messed up beyond repair. ive had two other quadrajets on it, and it runs like *****. ive tried a rebuild kit. i consider myself a decent mechanic, i can usually make anything run. i can rebuild 4 carbs on a motorcycle and have it perfect. so........im done with it.
what carb are you guys running other than quadrajet, that you like. im looking for out of the box, bolt it on, done.
what carb are you guys running other than quadrajet, that you like. im looking for out of the box, bolt it on, done.
November 1st, 2021, 08:24 PM
#5
CH3NO2 LEARN IT BURN IT
Join Date: Jul 2010
Location: Land of Taxes
Posts: 4,884
Nothing beats a properly set up QJ....but...The Ebrock AVS2 is a good alternative. The 1400 or the 1900 series. Watch the vid to aid in proper selection or call them. Buy the larger rod spring & jet kit. Follow the tuning instructions. I have a 1900 on my 327 Vette. I like it. You can change the rods springs & jets without disassembling the carb...on the car.
https://www.edelbrock.com/shop/carburetors.html
https://www.edelbrock.com/shop/carburetors.html
November 1st, 2021, 08:54 PM
#6
72Cutlass S
Join Date: Jul 2011
Location: Bakersfield, CA
Posts: 1,040
Nothing beats a properly set up QJ....but...The Ebrock AVS2 is a good alternative. The 1400 or the 1900 series. Watch the vid to aid in proper selection or call them. Buy the larger rod spring & jet kit. Follow the tuning instructions. I have a 1900 on my 327 Vette. I like it. You can change the rods springs & jets without disassembling the carb...on the car.
https://www.edelbrock.com/shop/carburetors.html
https://www.edelbrock.com/shop/carburetors.html
November 2nd, 2021, 05:47 AM
#7
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,451
Any aftermarket carb will typically be set up perfectly out of the box - for a CHEVY motor. Unless you plan to run a AFR meter and play with jetting, find someone who actually knows how to properly rebuild and adjust a stock Qjet.
November 2nd, 2021, 06:02 AM
#8
Registered User
Join Date: Feb 2009
Location: West Hartford, CT
Posts: 1,433
I get that you’re done dickin with it and maybe the other carbs don’t belong to you but I can only guess you’re missing something. I hope you can solve problem(s) so you can enjoy your car, regardless how you handle the carb situation. Might not hurt to post details of the offending behavior, there’s lots of sharp people here that might be able to help from afar with fresh points of view.
….
November 2nd, 2021, 11:00 AM
#9
Registered User
Join Date: Aug 2020
Location: Dallas
Posts: 629
As many others here mention, a properly setup Quadrajet should work great for your application, and since it sounds like you have more than one in your possession, you might consider finding an expert to rebuild one for you.
Since I switched from a 2bbl to an Edelbrock Performer intake for my 68 350, I needed a new carb, and since I did not already own a Quadrajet, I bought one of the cheapest new Holleys I could find, a 600 cfm 4160 model. I have a lot more experience with Holleys, and they are dead simple to rebuild and modify; but the main reason I did this was to keep the costs down. I paid as much to have an "expert" rebuild my 2bbl as what I paid for the brand new Holley. I probably could have gone with more CFM, but I do not intend to spend much time in high RPM with my old engine. When I get around to rebuilding it, I plan to switch to EFI, so keeping this cheap and easy were my goals.
But as Joe said, it was not ready to go out of the box regardless of what Holley said. That said, it did not take much to dial it in to my liking. I replaced the vacuum secondary spring housing with the quick change version which does not require you to remove the choke to change the springs. I switched to the second lightest vacuum secondary spring. This seemed to work well for my engine. I did not have to change the jets, but I did have to change the idle mixture setting and idle speed. Keep in mind that this also required wiring up the electric choke, finding a proper bracket for the throttle and installing a spacer / adapter to fit properly.
By reading the spark plugs, it seems fine. I may add a wide band O2 sensor and work on the jetting at some point, but it works great as is. The engine is strong, runs smoothly, starts easily and has great throttle response. All in, I am close to $500. You could probably do better buying off of ebay or Craigslist, though.
Since I switched from a 2bbl to an Edelbrock Performer intake for my 68 350, I needed a new carb, and since I did not already own a Quadrajet, I bought one of the cheapest new Holleys I could find, a 600 cfm 4160 model. I have a lot more experience with Holleys, and they are dead simple to rebuild and modify; but the main reason I did this was to keep the costs down. I paid as much to have an "expert" rebuild my 2bbl as what I paid for the brand new Holley. I probably could have gone with more CFM, but I do not intend to spend much time in high RPM with my old engine. When I get around to rebuilding it, I plan to switch to EFI, so keeping this cheap and easy were my goals.
But as Joe said, it was not ready to go out of the box regardless of what Holley said. That said, it did not take much to dial it in to my liking. I replaced the vacuum secondary spring housing with the quick change version which does not require you to remove the choke to change the springs. I switched to the second lightest vacuum secondary spring. This seemed to work well for my engine. I did not have to change the jets, but I did have to change the idle mixture setting and idle speed. Keep in mind that this also required wiring up the electric choke, finding a proper bracket for the throttle and installing a spacer / adapter to fit properly.
By reading the spark plugs, it seems fine. I may add a wide band O2 sensor and work on the jetting at some point, but it works great as is. The engine is strong, runs smoothly, starts easily and has great throttle response. All in, I am close to $500. You could probably do better buying off of ebay or Craigslist, though.
November 2nd, 2021, 01:21 PM
#10
Rocket Renegade!
Join Date: Dec 2014
Location: Vancouver Island
Posts: 4,468
If you're dead set against the QJ, I've had good experiences with the Holley Street Avenger. Runs well out of the box (at least it did on my Chevy L-79) and if it doesn't, it's very tunable. 'Course now you'd be looking at an open-plenum manifold for the square-bore if the holes don't line up. But you'd probably be doing that with anything that isn't a QJ.
November 2nd, 2021, 02:20 PM
#12
Registered User
Thread Starter
Join Date: Feb 2012
Location: billings mt
Posts: 44
the original carb, i would love to have kept, but it was leaking at the fuel inlet, threads were bad. got one of those "repair" pieces, which is basically a longer threaded brass version, put it in, still leaking, gave it one last lil tug, and it broke off inside there. crappola, that ones gone. second and third are extras, but it seems any time i open the top of one of these, for any reason, i have float and or choke issues. i hate that you have to tear into it so far to get to the damn float, only to find out its not quite right and have to go in again. even after a kit, ive got bent linkages, bad chokes, and im frankly just tired of messin with it.
so........im gonna take all three, just as you say, take my time, and make one out of three. at least ill give it a serious try.
ive never had so much carb trouble in my life, and ive done 4 carb setups on motorcycles...............
so........im gonna take all three, just as you say, take my time, and make one out of three. at least ill give it a serious try.
ive never had so much carb trouble in my life, and ive done 4 carb setups on motorcycles...............
November 2nd, 2021, 02:28 PM
#13
Banned
Join Date: Oct 2012
Posts: 6,267
It is possible to have three carbs with issues I suppose. I have the factory Quadrajet on my 66. I rebuilt it once myself. I had not rebuilt a carburetor on my own before. (Well other than plenty of motorcycle carburetors.) I have had zero issues with the carb since. Rebuilding a carburetor wasn't nearly the brain damage that I had expected. Be patient. You will figure it all out.
November 3rd, 2021, 11:28 AM
#16
Registered User
Join Date: Aug 2014
Location: Western North Carolina
Posts: 572
If you're still interested in aftermarket carb suggestions, look into the Demon (Holley) Street Demon. 750cfm is a common size and it gets many good reviews. I can tell you from personal experience it's a good carb and anyone I know that I've recommended it to has been very satisfied. As with anything, some slight tuning is recommended but well worth the money.
November 3rd, 2021, 02:26 PM
#17
Registered User
Thread Starter
Join Date: Feb 2012
Location: billings mt
Posts: 44
gentlemen! we have success!
so i spent the last 2 days going over this thing with a magnifying glass. had all kinds of issues, and together made for a big mess. had a bad choke pulloff, it would bind, but not always. the little lift arm for the secondary metering rods, was bent ever so slightly, they would come up too far and sometimes get hung up. and a cracked vac cap too, one of the small ones that was capped off.
and finally, a new plastic o ring on the inlet fitting, no more leak there......whew!
thanks for putting up with my questions/whining! i appreciate all the help
so i spent the last 2 days going over this thing with a magnifying glass. had all kinds of issues, and together made for a big mess. had a bad choke pulloff, it would bind, but not always. the little lift arm for the secondary metering rods, was bent ever so slightly, they would come up too far and sometimes get hung up. and a cracked vac cap too, one of the small ones that was capped off.
and finally, a new plastic o ring on the inlet fitting, no more leak there......whew!
thanks for putting up with my questions/whining! i appreciate all the help
November 3rd, 2021, 10:57 PM
#19
Registered User
Join Date: Nov 2020
Location: Washington State
Posts: 412
67 supreme, all stock original. original carb is messed up beyond repair. ive had two other quadrajets on it, and it runs like *****. ive tried a rebuild kit. i consider myself a decent mechanic, i can usually make anything run. i can rebuild 4 carbs on a motorcycle and have it perfect. so........im done with it.
what carb are you guys running other than quadrajet, that you like. im looking for out of the box, bolt it on, done.
what carb are you guys running other than quadrajet, that you like. im looking for out of the box, bolt it on, done.
November 4th, 2021, 07:12 PM
#20
Registered User
Join Date: Nov 2020
Location: Washington State
Posts: 412
gentlemen! we have success!
so i spent the last 2 days going over this thing with a magnifying glass. had all kinds of issues, and together made for a big mess. had a bad choke pulloff, it would bind, but not always. the little lift arm for the secondary metering rods, was bent ever so slightly, they would come up too far and sometimes get hung up. and a cracked vac cap too, one of the small ones that was capped off.
and finally, a new plastic o ring on the inlet fitting, no more leak there......whew!
thanks for putting up with my questions/whining! i appreciate all the help
so i spent the last 2 days going over this thing with a magnifying glass. had all kinds of issues, and together made for a big mess. had a bad choke pulloff, it would bind, but not always. the little lift arm for the secondary metering rods, was bent ever so slightly, they would come up too far and sometimes get hung up. and a cracked vac cap too, one of the small ones that was capped off.
and finally, a new plastic o ring on the inlet fitting, no more leak there......whew!
thanks for putting up with my questions/whining! i appreciate all the help
November 5th, 2021, 12:57 PM
#21
Registered User
Join Date: Feb 2013
Location: Phoenix, AZ
Posts: 13,882
Congratulations on becoming a successful QuadraJet rebuilder! Sounds like you really took some time to identify and correct all those issues. I'm sure that's a good feeling now that you have a working carb.
November 5th, 2021, 02:25 PM
#22
Running On Empty
Join Date: Jul 2018
Location: Earth
Posts: 18,287
gentlemen! we have success!
so i spent the last 2 days going over this thing with a magnifying glass. had all kinds of issues, and together made for a big mess. had a bad choke pulloff, it would bind, but not always. the little lift arm for the secondary metering rods, was bent ever so slightly, they would come up too far and sometimes get hung up. and a cracked vac cap too, one of the small ones that was capped off.
and finally, a new plastic o ring on the inlet fitting, no more leak there......whew!
thanks for putting up with my questions/whining! i appreciate all the help
so i spent the last 2 days going over this thing with a magnifying glass. had all kinds of issues, and together made for a big mess. had a bad choke pulloff, it would bind, but not always. the little lift arm for the secondary metering rods, was bent ever so slightly, they would come up too far and sometimes get hung up. and a cracked vac cap too, one of the small ones that was capped off.
and finally, a new plastic o ring on the inlet fitting, no more leak there......whew!
thanks for putting up with my questions/whining! i appreciate all the help
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