Quadrajet vs Edelbrock 1405

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agv18

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Hey guys I wanted get somebody’s input on which carburetor I should put in. The car is a 1972 Scamp with a 318, the car is pretty much stock and I was curious if it was worth the effort to upgrade. It has the original Carter bbd that does the job, but I also just got a quadrajet and a edelbrock 1405 sitting around and I was curious on what anybody thought on dropping either one in.
On a side note there is somebody selling an edelbrock performer intake in my area, was also curious if it is recommended.
Thank you!!!
 
I think a Quadrjet is different bolt pattern and a spreadbore.
1405 would be the easiest way.
 
agv18 said:
Hey guys I wanted get somebody’s input on which carburetor I should put in. The car is a 1972 Scamp with a 318, the car is pretty much stock and I was curious if it was worth the effort to upgrade. It has the original Carter bbd that does the job, but I also just got a quadrajet and a edelbrock 1405 sitting around and I was curious on what anybody thought on dropping either one in.
On a side note there is somebody selling an edelbrock performer intake in my area, was also curious if it is recommended.
Thank you!!!
Click to expand...
What’s your area, I have a Performer.
Send me a PM.

On the carb, ether is fine.
I like a spread bore for its fuel efficient small primary side and excellent secondary power adding when you hit that beautiful WOT for a sweet roar.

The 1405 is absolutely fine as well. I make use of them often. They are also good on fuel.

Everything is tuning tuning and tuning.
If you do that, tune the high heavens out of it and the ignition, with 2.76 gears you can see 20 mpg and better on a flat road. I did with a 600 on a 360 in a 3700lbs car.
 
You should verify the Qjet in question is something that’s not from smog era before jumping on that band wagon.
Also, you’re not going to find tuning parts for it at the local parts store.
 
agv18 said:
Hey guys I wanted get somebody’s input on which carburetor I should put in. The car is a 1972 Scamp with a 318, the car is pretty much stock and I was curious if it was worth the effort to upgrade. It has the original Carter bbd that does the job, but I also just got a quadrajet and a edelbrock 1405 sitting around and I was curious on what anybody thought on dropping either one in.
On a side note there is somebody selling an edelbrock performer intake in my area, was also curious if it is recommended.
Thank you!!!
Click to expand...
Depends on the manifold- there's a couple different "Performer" manifolds that Edelbrock makes.
Std. Performer-
1762637018260.png

This will take either the 1405 or the QJet.

Performer RPM-
1762637170827.png

This will only take the 1405 or other "square bore" carb, unless you use an adapter.

Performer RPM Air Gap-
1762637353725.png

Again, will only use the square bore carb, unless an adapter is used.

Either carb will need a Mopar linkage adapter.
You will also need 4bbl. throttle and kickdown linkage brackets, unless you have the ability to fabricate and modify your old 2bbl. linkages.
And don't forget an air cleaner.
 
Professor Fate said:
Depends on the manifold- there's a couple different "Performer" manifolds that Edelbrock makes.
Std. Performer-
View attachment 1716476186
This will take either the 1405 or the QJet.

Performer RPM-
View attachment 1716476187
This will only take the 1405 or other "square bore" carb, unless you use an adapter.

Performer RPM Air Gap-
View attachment 1716476189
Again, will only use the square bore carb, unless an adapter is used.

Either carb will need a Mopar linkage adapter.
You will also need 4bbl. throttle and kickdown linkage brackets, unless you have the ability to fabricate and modify your old 2bbl. linkages.
And don't forget an air cleaner.
Click to expand...
It’s the std. model! Thank you for the input, do you know where a good place to buy the linkage? I think I could maybe fabricate it but I’m not sure what it looks like?
 
QJ carbs were very model specific & lots of variants over the years. I would use the Edel carb, tuning kits readily available.
 
If you use the 1405, get the thick base gasket from Edelbrock as it helps keep the carb cooler and prevents the fuel from boiling. I believe you also need Edelbrock's adapter plate to mount the 1405 on a Performer intake to prevent a vacuum leak. They also sell a specific Mopar throttle lever that bolts on to the throttle arm on the carb to help get your kickdown linkage to work properly.
 
standard performer and a 1405 is a tough combo to beat. affordable, available and it's easy to set up and tune.

recurve the distributor while you're there.

you mentioned a bbd, so because you're starting with 2bbl linkage you'll need to modify your stuff to use with the 4bbl or buy more suitable pieces. the mopar specific throttle arm from edelbrock is widely available. the kick down for the transmission is especially important. there are tons of threads on here that outline the process.
 
Do you have one bit of mopar pride?if you do you would never stick a quadrajet on it Unless you have to. It's like putting steak sauce on ice cream. jmo
 
Dart Frog said:
Do you have one bit of mopar pride you would never stick a quadrajet on it Unless you have to. It's like putting steak sauce on ice cream. jmo
Click to expand...
A stupid *** reply since Chrysler went to the Rochester carb when Carter was having trouble and closed.

Q-Jets can be found on vans.

To the original poster, I’d use the Carter myself as mentioned above about parts for tuning. Gaskets, other accessories.
The thick gasket mentioned is an absolute excellent idea and would not suggest anything else to use.
 
rumblefish360 said:
A stupid *** reply since Chrysler went to the Rochester carb when Carter was having trouble and closed.

Q-Jets can be found on vans.

To the original poster, I’d use the Carter myself as mentioned above about parts for tuning. Gaskets, other accessories.
The thick gasket mentioned is an absolute excellent idea and would not suggest anything else to use.
Click to expand...
I forgot about that . And I owned a car with a Rochester.
 

My truck has a Q jet, works great. BUT unless the OP has all the stuff to go with, stick with the 1405 plan.

1762655197625.png
 
rumblefish360 said:
A stupid *** reply since Chrysler went to the Rochester carb when Carter was having trouble and closed.

Q-Jets can be found on vans.

To the original poster, I’d use the Carter myself as mentioned above about parts for tuning. Gaskets, other accessories.
The thick gasket mentioned is an absolute excellent idea and would not suggest anything else to use.
Click to expand...
Doesn't line up with your opinion but you can GFY
 
Dart Frog said:
Doesn't line up with your opinion but you can GFY
Click to expand...
Be that as it may, but he was right. Chrysler put literally millions of Q-jet carburetors on cars and trucks. Police vehicles used them damn near exclusively through the 80s on both 318s and 360s. Trucks as well. Very common to find.
 
Dart Frog said:
Doesn't line up with your opinion but you can GFY
Click to expand...
Apology for saying your reply was a stupid *** one.

But it was because you immediately went for his throat with “Pride” of owning a MoPar & offending the MoPar & the MoPar world with what you didn’t think came on a MoPar.

It’s a correction for you and anyone else that thinks a Q-J wasn’t ever stock on a MoPar.

If you had read my first reply to the thread, you wouldn’t be saying what you did. Now I’m starting to think you may be as stupid as your reply.

Even so, what if decides on a complete different carb?
Who the “F” are you?

STFU & YOU! GFY!!!!

His car his way and screw anybody that’s got ill words for his choices.
If you don’t like his choice, make him an offer to purchase the car and do correctly.
But for sure! Post ever step of the process here so we can rip you apart and your choices. I’ll be sure to join along and take special aim at ridicule just for you all special like.

Get over yourself.
 
Last edited:
agv18 said:
Looks great man! I’m still pretty new to classic cars so I appreciate the visual!
Click to expand...
If you're starting out, I recommend staying away from the Quardajet and the Thermoquad. They are both fine carburetors, but they require a pretty steep learning curve. The 1405 is much easier to tune and repair, IMO.
 
junkyardhero said:
standard performer and a 1405 is a tough combo to beat. affordable, available and it's easy to set up and tune.
Click to expand...
So well said, I will just agree.
I have had two new Edelbrock carbs (both electric choke), and they worked great right out of the box with very little tuning/adjusting.
 
rumblefish360 said:
Apology for saying your reply was a stupid *** one.

But it was because you immediately went for his throat with “Pride” of owning a MoPar & offending the MoPar & the MoPar world with what you didn’t think came on a MoPar.

It’s a correction for you and anyone else that thinks a Q-J wasn’t ever stock on a MoPar.

If you had read my first reply to the thread, you wouldn’t be saying what you did. Now I’m starting to think you may be as stupid as your reply.

Even so, what if decides on a complete different carb?
Who the “F” are you?

STFU & YOU! GFY!!!!

His car his way and screw anybody that’s got ill words for his choices.
If you don’t like his choice, make him an offer to purchase the car and do correctly.
But for sure! Post ever step of the process here so we can rip you apart and your choices. I’ll be sure to join along and take special aim at ridicule just for you all special like.

Get over yourself.
Click to expand...
Yes and the QUADRAJET was available OVER THE COUNTER with a CHRYSLER part number. Much like the A833 was used in Chevy trucks, the Quadrajet crossed multiple maker's isles. People should think before they speak.
 
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