Where to get a new carb from
#1
Where to get a new carb from
I have a 68 Olds Toro 455 in my 72 Cutlass Supreme . Can I get a remanufactured Quadrajet for it or do I need to replace the intake also ? I noticed that Summit has some 750 - 800 CFM carbs but they don't seem to be for this application ... when I type 68 Toro in nothing comes up . Thanks in advance.
#2
I suggest you either rebuild the Qjet you have or have it rebuilt professionally. There are members on our site that do Qjet rebuilds. If your heart is set on an aftermarket carb I would caution you against using the Summit carburetor. I have one on my 71 98 and it ALWAYS needs tinkering and I already rebuilt it once. You can get an Edelbrock Thunder AVS or a Holley Street Avenger for a little bit more and they are far superior to the Summit carb,
#3
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
Bryan, I found this on the first line of my search. You should be able to determine what you have by looking at the side bowl of the carb and go from there. Is it 4MC or 4MV?
1968 Oldsmobile Toronado Carb Repair Kit
1968 Oldsmobile Toronado Carb Repair Kit
#5
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
I have used this guy - his name is Rusty Petrovic. He sold me a restored 7042250 for my 72 Cutlass S. It was done to perfection and was very reasonably priced.
The Carburetor Doctor
The Carburetor Doctor
#6
Ken from Everyday Performance is a Qjet guru - he can customize it to your specs and is very well regarded amongst the Qjet crowd - I have one of his builds on my 350 and it rocks.
http://www.everyday-performance.com/
Another source I've used in the past is Allstate Carburetor - also excellent at general rebuilds and beyond.
https://allcarbs.com/contact/
http://www.everyday-performance.com/
Another source I've used in the past is Allstate Carburetor - also excellent at general rebuilds and beyond.
https://allcarbs.com/contact/
#9
I have used this guy - his name is Rusty Petrovic. He sold me a restored 7042250 for my 72 Cutlass S. It was done to perfection and was very reasonably priced.
The Carburetor Doctor
The Carburetor Doctor
Bryan, I found this on the first line of my search. You should be able to determine what you have by looking at the side bowl of the carb and go from there. Is it 4MC or 4MV?
1968 Oldsmobile Toronado Carb Repair Kit
1968 Oldsmobile Toronado Carb Repair Kit
IDK , I can't see anymore.... the carburetor had the same issue when I was driving the Toronado. It hesitates / stumbles when you first accelerate the vehicle .
The accelerator pump looks great at a glance, but that is probably the issue
Last edited by oldsguybry; March 13th, 2019 at 08:06 AM.
#12
You should see if you have a local guy that knows how to tune a carb. Mine was rebuilt but wasn't ask crisp as i'd like it. I had someone tune it that knows what they are doing & it was a tire shredding monster
#14
yes , I thought about that also . I messed around with the air gas mixture screws so its probably way out of tune
#16
If I'm not mistaken they are the well plugs for the fuel well (under where the float sits). These are prone to leaking which caused the fuel to run into the intake which depletes the fuel in the well for the carb to actually use for accelerating and also supplies fuel into the intake when it's not wanted. I can't say that this is your problem but I hope that it helps.
#18
...they are the well plugs for the fuel well (under where the float sits). These are prone to leaking which caused the fuel to run into the intake which depletes the fuel in the well for the carb to actually use for accelerating and also supplies fuel into the intake when it's not wanted. I can't say that this is your problem but I hope that it helps.
I don't know this as a fact, but I've read the earlier (pre-1970?) had a tendency to leak more so than later Quads.
#19
You don't have to buy anything to check your accelerator pump. Just look down the carb and pump the throttle. There should be a couple of spray nozzles squirting a full stream of fuel. If nothing or broken stream the pump is bad.... Tedd
#21
Thanks , I'm going to check the pump first . It has the neoprene seal instead of the leather one . No matter what tinkering I did on this carburetor it still has this hesitation , but only under load . It doesn't do this in park or neutral unless it's cold. IIRC , it was better at one point until I turned the idle up .
#22
I put a new accelerator pump in but it still hesitates . I'll have to mess around with the carb a bit more and get it tuned properly eventually after a rebuild . Right now I'm more concerned with getting the body primed and sealed so I don't have anymore rust issues .
#23
I put a new accelerator pump in but it still hesitates . I'll have to mess around with the carb a bit more and get it tuned properly eventually after a rebuild . Right now I'm more concerned with getting the body primed and sealed so I don't have anymore rust issues .
#24
Sometimes the check ball gets stuck under the accelerator pump and this will prevent the pump from working. Did you look down the venturis while opening the throttle by hand? You should see a couple of squirts of fuel if working correctly.
#25
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