Quadrajet Power How to change jets and primary rods in Quadrajet Qjet

Detailed explanation on how to change jets and primary rods in the Quadrajet carburetor.
Jets are located inside the fuel bowl and changing them requires you to remove the air horn and internal components.
All parts, kits, and much more for the quadrajet are available at our website: www.quadrajetpower.com
New Jets: quadrajetpower...
New primary rods: quadrajetpower...
Used primary rods: quadrajetpower...
Pick tool: quadrajetpower...
Complete kits: quadrajetpower...

[@jeffallen3382]

I know how you feel about losing your favorite tool. Mine is my picket screwdriver. I use it in every car I work on!

[@pauldow1648]

Great tutorial. I like quadrajets.

[@QuadrajetPowerLLC]

Thank you

[@jeffreifers6068]

I live at 6,000 feet. Do i need to reduce my jet size (one size for each 2,000') similar to Holley? Carb on Chevy 305. Great video!

[@QuadrajetPowerLLC]

Reduce original jet size by one in your case. Quadrajet jetting is typically changed down one size at 5000' and one size lower every 2000' over that. However, keep in mind todays fuel burn faster, so at 5000' stock jetting should be good.

[@jeffreifers6068]

Excellent. Thanks for your help!

[@tubesocktv69]

What jetting, primary and secondary’s do I need for my 87 caprice classic quadrajet for here in TX? Was rebuilt and jetted for Colorado altitude so I need to change that. Any and all advice will be extremely appreciated

[@franciscotrujillo4961]

Did this carburetor have the original parts? What type of engine is it usually mounted on? Would it work for an omc cobra 5.0 v8 engine? Can you tell me where I can get the paper you use in some of your videos where the quadrajet models come from to know their jet and primary needle specifications? all the best

[@pasqualedemaio919]

What would be the purpose of changing the jets in the carburetor? How would you know if they needed to be changed?

[@QuadrajetPowerLLC]

Each carb code was calibrated for a specific application and fuels back then. If engine is changed, or carb moved to different than original engine, it needs to be calibrated and jets are one step to that. Also, with todays fuels, a stock carb can use a size larger in jets than original to allow more fuel.

[@pasqualedemaio919]

@@QuadrajetPowerLLC Thank you for responding.

[@picco68]

hello my engine builder swapped out my jets not sure the size as the number is all messed up on the top, it had 73 jets, but he did not use the main metering rods what effect will this have ,, i just put the original stuff back to try the difference since the motor has been rebuilt as a starting point

[@geebopbaluba1591]

Is it important to have that plastic cover over the float? My 17058213 carb doesn’t have it

[@QuadrajetPowerLLC]

Yes, the float cover is needed.

[@GJJC13]

is there a way of getting better mpg by changing the jets and primary rods?

[@timclough8402]

It’s not quite that simple. It’s more about optimizing your engine and once it’s running correctly your mpg’s will be as good as they can get. That being said: quadrajets are pretty much the most efficient 4 barrel carb.

[@honuswagner9348]

15:40 I've ordered 3 rebuild kits from you and they've never came with a power piston retainer

[@QuadrajetPowerLLC]

I looked up your name and don’t see any orders from you. You must be ordering from somewhere else. All of our rebuild kits include power piston retainer. Order your kits from us next time. We would appreciate your business.

[@georgekalafatis7286]

Hey guys I have a early 66 quadrajet on a 327 and the bowl has a Preston needle and seat I need to thread it because it leaks is there a tap for that

[@QuadrajetPowerLLC]

The early seat uses the o ring fitting with 2 screws holding it in place. It will not accept the threaded type seat. We sell the type you need. quadrajetpower.com/early-style-needle-and-seat-with-o-rings/

[@20alphabet]

Fuel injection will never atomize the air/fuel mixture.