I am using the .020 over marine HG and only took .002 off the head when it was O-ringged. What washers do I need for the best power? Should be 1.5mm stock if im not mistaken. I feel that the nozzles are specifically designed with the distance and angle to the piston and bowl in mind and want to get as close as I can to perfect.

 

If the stock washers are 1.5mm, then you should use a thinner washer to get the tip in the same spot. Say some 1.0mm washers. They are probably the closest thing you are gonna find. The additional distance between the nozzle and piston should have increased by 0.4572mm

 

still unsure if you can even change washer size due to the specific location of the fuel inlet in the injector and it binding the crossover tube. I think the only injectors that can be changed as far as depth are 12v.

 

i do know for our 12v cummins offered me 4 differnt thinkness in washers when i rebuilt my engine

 

on ijecion tip pprotrusion/recession, you have a parameter, if your head was surfaced and still is whithin the specifications, then you dont need to change your washer for the injector, usally the parameter is something like +- 0.014, not sure but i will look it up for you .

 

Good point.