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Author Topic:   Quadrajet question
Leadfoot#8
Dirt Full Roller

Total posts: 44
posted April 20, 2004 03:57 AM  
I have to run a quadrajet ,,,,,,,so when I go to the parts house what do I ask for???? Do I need to up the jets or is stock fine???
This is a flattop open chambered head motor,,,headers,,,small hydraulic cam. Any ideas????
Thanks

4racer19
Dirt Roller

Total posts: 18
posted April 20, 2004 05:39 PM  
Just a couple of tips that friend once did for me when I ran one.

He milled down the needles in the back, as well as the plastic block. This allowed into flow more fuel.

Watch for quads that have a screw in the center. Had that come out, motor went up out of turn 4 in front of the field.....not much left.

racerman707
Dirt Freak

Total posts: 374
posted April 23, 2004 07:34 PM  
If it's a 350 start with 64 jets in the front.As far as the secondaries,don't get the top flaps too loose or it will bog real bad.The best one I ever ran was off a 70 truck.Hope this helps.

o5racer
Dirt Freak

Total posts: 402
posted April 24, 2004 05:20 PM  
64 seems way to lean considering that most of the 350 q-jets I have tore apart came with 72 or 74 main jets. its better to start off rich than lean. The q-jet on my street stock has 78 main jets but that is feeding over 350 horses too.

blackbart
Dirt Roller

Total posts: 16
posted April 26, 2004 07:14 PM  
MAKE SURE THAT YOU LEAVE THE CHOKE PULL-OFF ON THE SIDE OF THE CARB. IF REMOVED IT WILL ALLOW THE SECONDARIES TO SLAM OPEN WHEN EXITING THE CORNER (WIDE OPEN THROTTLE) WHICH WILL RESULT IN A MASSIVE BOG. I HAD THIS HAPPEN AND IT TOOK A LITTLE WHILE TO FIGURE OUT.(THANX BERNIE)

[This message has been edited by blackbart (edited April 26, 2004).]

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