General Category > Quadrajet Carb Talk and Tips
blow through quadrajet in a box questions....
shnitzel:
Hello all!
I have been tuning a 73 nova with a stock 350, quadrajet carb in a sealed box with 2 little turbos. 6psi boost max.
it has a boost guage, fuel pressure guage AND AFR meter. so i can keep a keen eye on whats going on.
It has a full msd system with boost timing control. And 1:1 boost fuel pressure regulator running from the carb box.
it runs great at 5.5psi of fuel pressure. it doesnt like more pressure than that at idle.
The car runs excellent, great driveability. with the small turbos boost hits FAST, no lag whatsoever.
The carb is in very good condition, fresh rebuild kit. I also have lots of spare carbs for parts to play with.
BUT, it runs very lean...... knocks under boost. AFR guage reads very lean under boost.
I'd like to know how to richen up the WOT portion of the carb so i can dump fuel down it under boost. I hope this is possible.
If it is too difficult to richen the WOT of the carb, i may add some cold start injectors that switch under boost to dump extra fuel down there....
shnitzel
Frank400:
what is the carburetor number and what was done to it ? Do you know what calibration is in there ?
carmantx:
Under boost in the box, your secondaries are probably not opening, even if the throttle blades are, the air valves may not be.
shnitzel:
I expected a night of ridicule about my project before any help. ha ha ha.
friday night ill be around the car and ill get the #'s from the actual carb.
ive been reading lots about the secondaries. i will play with those some.
ill let you know specs friday night,
shnitzel
Frank400:
--- Quote from: shnitzel on October 10, 2018, 09:53:23 PM ---I expected a night of ridicule about my project before any help. ha ha ha.
friday night ill be around the car and ill get the #'s from the actual carb.
ive been reading lots about the secondaries. i will play with those some.
ill let you know specs friday night,
shnitzel
--- End quote ---
...and show us a picture of that set-up ! I had been thinking of doing such a thing as a fun project.
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