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Any way I can find a stock carb that isn’t literally 55 years old though? As much as I like keeping what I can original, I just don’t like the idea of paying a grand for a carb that’s been used for half a century. Are there any new carbs that are basically replicas or built to emulate the original?
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Originally Posted by BlankSlate
Any way I can find a stock carb that isn’t literally 55 years old though? As much as I like keeping what I can original, I just don’t like the idea of paying a grand for a carb that’s been used for half a century. Are there any new carbs that are basically replicas or built to emulate the original?
you can find a decent rebuildable carb for under $100
Lars is the man to have your QJet rebuilt, he did one for me years ago. Excellent
If you want a new carb still look at the Holley 6210. I had one years ago on Pontiac 455, you can convert it to an electronic choke if you wish, I converted mine to an electronic choke and it ran excellent right out of the box.
DO NOT put another square bore carb on the Q-Jet intake with an adapter like you have.......you want to know why it runs like ****? It is that adapter. That adapter has been the cause of me tuning about half of the cars I have tuned over the years......everytime one shows up I tell the customer it cannot be properly tuned with that setup.....it just can't.
Look at the picture.....see the blue circles? That is where your Edelbrock throttle plate tip into during the thousand of times you are in an out of the throttle while driving around town......the air cannot get through that area, but it is designed to have the vacuum pull the air straight down into the intake........now ALL of the air must go around the front of the throttle blade that is sticking up.......and past the transfer slot....which will pull too much fuel....then the throttle is opened more and more fuel is pulled out of the boosters that has no where to go......so, people try to "tune" this out.....which makes for a **** fuel curve......poor MPG, poor response and black reversion inside the primary throttle bores......just because it bolts on and looks good doesn't mean it is worth a ****. These are bought at Pep Boys and installed for that exact reason.....it is shiny and the bolts line up.
There are three ways to fix this.....
1) Buy a good usable Q-Jet core from E-Bay......get one that is close to your engine for spec......send it to Lars for refurbishment......
2) Keep the current carb and swap the intake for a 2101 Edelbrock Performer.......that the Edelbrock carb will bolt to.....use a 1204 Fel Pro intake gasket to block the nasty HeatRiser port......you will gain a few ponies, lose 25lbs., and gain a cleaner look.....
3) Replace carb and intake together.......
I do not install Edelbrock carbs anymore as they are too picky about fuel pressure and take too much to setup compared to other units I go with.......but they are not absolutely terrible......I will tune them....but not on a stock Q-Jet intake with an adapter.....becasue it is impossible.
As far as what Q-Jet to look for I have really good luck with 76-80 model Corvette L-48 and L-82 carbs......they can be easily modified for electric choke and have good base calibration.....
Jebby
I have a used elder Brock 2101 manifold you can have for 100 bucks plus shipping don’t be afraid of 55-year-old Hollys. Anything that can wear out can be replaced with new parts.
02-03-2024, 02:02 PM
