Jet Performance Quadrajet JET Performance anyone gotz?

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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
292
Reaction score
531
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
 

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