General Category > Quadrajet Carb Talk and Tips

POE restriction / tube restriction

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Marx3:
Hi, I am in the middle of rebuilding af carb, and suddenly it struck me... I am not really sure which is the POE restriction, and which is the tube restriction.

In the fuelpassage from the secondary jets, sticks a brasstube.. the bottom of this is the... tube restriction?

The hole in the top of the secondary bore, just in line with the airflaps, is the ... POE restricition?

Or is the poe restriction in the bottom of the thicker brass tube that sticks in the well?

Cliff Ruggles:
The tubes are not a restriction.  There are well restrictions in the main casting, and POE restrictions in the airhorn above, below, or in line with the secondary airflaps....Cliff

Marx3:
Okay, so the holes in the airhorn is the POE restriction, but which is the tube restriction? what hole is supposed to be .036 according to recipe 1???

Cliff Ruggles:
Different system.  The long thin tubes in the main secondary fuel supply get the .036" holes, they are high speed airbleeds, not POE....Cliff

Marx3:
Ok, so, just for the record, the thin tubes in the secondary-system are the ones called tube-restrictions? Or is that only on some applications?
 Anyways, I see how they work as emulsion-tubes, since they stick out in open air at the top of the airhorn.

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