Quote:
Originally Posted by big deuce
Lately I picked up a set of IDA's all have the made in "blank" casting. Assuming Spain, all have the 3 progression holes. Three of them match, the 4th is drilled differently, but with 3 holes. See pics. When the butterfly is closed on the 3 that match,it covers the bottom hole. On the 4th carb with the different pattern, the bottom two holes are covered. Am I screwed? Or can they be filled and correct pattern established?
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You can fix that and drill the hole in the correct spot.
Make or have someone make a 1mm slightly conical aluminum shaft (starting ata say 0.9mm and anding at 1.2mm) and stick it inside the wrong hole. Hammer it with a punch until it is stays blocked inside the hole, cut off the excess (if any) sticking out inside the throat bore and you have the wrong hole plugged.
Now drill a new hole. With a strong needle first slightly mark the place you want to make the new hole.If it is not correct mark again where it should be until you get the right spot (use a magnifying las to see what you are doing). Then tap the needle with a hammer to mark the spot and make it a guide for the 1mm hole you will be drilling with a dremel or similar handheld electric drill.