Jet Performance Quadrajet JET Performance anyone gotz?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

legend57

Supporting Member
Supporting Member
Joined
Jan 11, 2022
Posts
62
Reaction score
113
Location
San Jose, CA
First Name
Rob
Truck Year
1976
Truck Model
K20
Engine Size
400
When searching for a Qjet, I ended up going with National Carburetors #ND4528, based on my truck's specs (1976 K20, HD Emission, 400 engine). I installed it on my freshly rebuilt 400 and it started right up and idles like a dream. When I blip the throttle, the response is immediate, without any stumbling. I haven't driven it on the road, so I'm sure adjustments will be needed, but out of the box, I'm very happy so far.

Note, I installed a Carter inline electric fuel pump. The best part is when I turn the ignition "ON", the 400 fires IMMEDIATELY. It starts almost faster than I can release the key. I've used that Carter pump before and it was very reliable.
 

JD Miller

Full Access Member
Joined
Sep 30, 2024
Posts
358
Reaction score
654
Location
Goober Idaho
First Name
JD
Truck Year
1981
Truck Model
K20 silverado
Engine Size
350
When searching for a Qjet, I ended up going with National Carburetors #ND4528, based on my truck's specs (1976 K20, HD Emission, 400 engine). I installed it on my freshly rebuilt 400 and it started right up and idles like a dream. When I blip the throttle, the response is immediate, without any stumbling. I haven't driven it on the road, so I'm sure adjustments will be needed, but out of the box, I'm very happy so far.

Note, I installed a Carter inline electric fuel pump. The best part is when I turn the ignition "ON", the 400 fires IMMEDIATELY. It starts almost faster than I can release the key. I've used that Carter pump before and it was very reliable.
I was looking at National Carbs website several times. I was thinking of buying from them rather than Jet Performance. Less money and Might even be a better core and the inside parts not hacked up like Ive heard Jet does.

Most the core / junk-yard Q-jet Carbs for sale on ebay , for rebuilding, are corroded/rusted garbage, nothing salvageable
 

arborvitian

Junior Member
Joined
Nov 29, 2024
Posts
21
Reaction score
90
Location
Virginia
First Name
Long-Winded Loser
Truck Year
1974
Truck Model
C30
Engine Size
350
Redacted
 
Last edited:

JD Miller

Full Access Member
Joined
Sep 30, 2024
Posts
358
Reaction score
654
Location
Goober Idaho
First Name
JD
Truck Year
1981
Truck Model
K20 silverado
Engine Size
350
arborvitian, there is a little swinging weight between the elec or heated choke housing and the carb on the throttle shaft that sounds like its sticking or the choke needs to be loosened and adjusted so it goes off sooner.

Maybe
 

arborvitian

Junior Member
Joined
Nov 29, 2024
Posts
21
Reaction score
90
Location
Virginia
First Name
Long-Winded Loser
Truck Year
1974
Truck Model
C30
Engine Size
350
Redacted
 
Last edited:

Latest posts

Forum statistics

Threads
44,416
Posts
957,125
Members
36,753
Latest member
TheRigLivesOn
Top