SIX DOLLAR shorty velocity stacks...
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Just cause I wanted to see if it would work.. I went a bought two of these at the thrift shop,
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total cost 2.89 each. Bring a magnet and make sure it doesn't stick, these are silver plated brass..
Take your newly purchased cup, chalice, champagne flute thing home and cut the bottom off as such
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Next, measure the carb that you will be enhancing and get the diameter of the filter side of the carb.. mine was 2.160, measure the thickness of the material of your cup, mine was .040 and then do some math.. 2.160 and .040*2 (theres two sides of the cup) and I got 2.240 and then I took off ten just to make sure i didn't cut too big. Slide your vernier calipers down the cup from the narrowest part of the taper to the rim until you reach the portion that is your measured amount and mark it..
Next mount your cup in your nearest drill press.. Like so..
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Fire it up and hold your chosen cutting device on your mark and cut the top off of the cup. I used the edge of a flat file, and seeing the the base metal was brass it made short work of it...
And my finished product, all I have left to do is pick up 3 very fine thread set screws, drill and tap the cup and drill 3 dimples in the lip of the carb for the set screw to seat into... Some locktite and the finished product will look like this..
I need to shop around a bit more and see if I can find some that are a little taller.....