Drilling Zenith Carburetor Jets
Posted by Gordon Biggar on November 30, 1997 at 20:31:42
| First, a thanks to Bob Carabbio for his input on the rebuilding of Model "A" transmissions. I have built a flow tester for testing the output of the various jets used in the Zenith carburetor.Most of mine are running somewhat on the rich side.Most articles on this subject only allude briefly to the technique employed in the soldering and drilling of the jets in order to resize them. I have a set of the smaller drill bits that can be used for this purpose.I could use some input on what drilling techniques have proved the most satisfactory (i.e., without enlarging the opening in the orifice).I remember reading somewhere that if one uses some stainless steel wire (.020"; hobby shop?), that this technique can be of value because solder will not adhere to stainless steel, thereby leaving a .020" opening from which to start once the soldering is completed. Others have suggested mounting the jet itself in a drill, rotating it at a slow speed to minimize wobble, and then using a pin vice to hold the bit in question, which is then brought into contact with the jet by hand.Somehow, I would think that it would be difficult to hold one's hand sufficiently steady for this technique to be effective. I would appreciate any thoughts from those who have gone through this drill already! Thanks. Gordon Biggar |
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