I Made set of no. 60 and 58 drill multi-port burner jets with no 62 strainer holes for our Model 607 steam car after the experimental no. 60 ones worked so well. Still breaking drills despite using free cutting steel, so again counter drilled stems 1/8" and plugged ends to reduce the thickness of metal to be drilled for the jets. Copied the Cruban countersunk to make using the nozzle picker easier. Idea with the 58 jets is to see if they will make the car perform better on the steep hills round here, which usually get steeper near the crest. With the 60 jets we often have only 300 psi by the time we near the top! We are running on 50/50 petrol diesel.
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