I have an OS Max 35 S that has the case drilled for a ST NVA. The venturi's I have just received from Lee's Machine are sized for the OS NVA ( I knew they would be ) Can I use the OS NVA's as is or will the over size hole in the case cause a problem ? I know I can drill the venturi to the ST size but I really don't want to use the ST set up. Will nylon or whatever washers on the outsides of the case work if the " as is " OS NVA's won't ? Thanks
Hello
The case most likley has never been driiled out, the OS MAX 35S were the same size spray bar as a ST, the new OS NVAs are much smaller in diameter than the 35S ones were.
You can use the new smaller OS bars but you will need a slighly thicker o-ring and you will also need to make sure that the sides of the spray bar where they contact the case are sealed and you don't get any air leaks there.
You will also need to keep in mind that the venturie will act like it is about 30 thou larger with the new style OS NVA over the older thicker ones
Randy