Quadrajet Power Tuning part throttle with jet and rod combinations

This video explains how to adjust your quadrajet part throttle fuel mixture rich and lean with different jet and primary rod combinations. Provides a brief description of the power piston stops at the APT screw. Also describes different primary rod types for APT in base, and internal APT screw. B series rods compared to K series and M series.

[carltaylor]

Just rebuilt a quadrapuke for a '79 chevy K20. These guys are very helpful. I will definitely be buying from them again. The selection of parts they have is great.

[williambaker]

A good video explaining the basics of primary rods, jets and power pistons etc. Thank you Sir !

[georgekalafatis]

I found a beautiful way to fix the Frozen and broken lower older apt that gets never adjusted because it's froze

[chrisburpo]

I have a 1983 water jet on a 5.3 LS and at Park throttle it pops if I stick my hand over the carburetor it origins of the mixture and runs better what Jets do you think I might need

[toddtroedel]

My carb number isn’t listed. Has a YZ suffix on the end of the numbers. Can you tell me what it originally was on?
It was removed from a 72 Corvette 350 auto but don’t believe it’s original for that car

By the way. Ordered a calibration kit from you and rebuilt the carb. It’s more than perfect. Very nice 👍🏻

[CodyShell]

if i'm at high elevation, around 5, 500 - 6, 500 feet, would i want smaller jets to lean it out?

[bobdimartino]

i rebuilt my 1975 delta quad on a 350 engine it seems this carb had the power valve with the two rods then it looked like another power valve right in front or behind it can't remember with one rod on a spring do you know why this is? thanks