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Message: [QUOTE="motoxracer42, post: 779867, member: 670"] The average machine shop will not have the equipment to edm nozzles. Your father may have the equipment or may not but its not common. I am not mad at anyone lol aint nobody got time for that. Honestly im just tired of seeing people getting taken advantage of and I felt like someone needed to get the point across. There are a lot of keyboard racers on here that read all day long and put together info from god knows where. Back to injectors lol here Electrical discharge machining (EDM) is extensively used in the fine machining of complex forms and shapes in mold and die cutting, and fine hole drilling in injector cups, etc. The process can be used to machine fully-hardened metal components such as tool steel, which would not be possible using ordinary machining processes. EDM is a thermal process which removes and re-deposits material on the object that is being machined. The area that is recast is usually much harder than the original surface with more resistance to abrasion and corrosion. In the EDM process, there is an electrical discharge that is formed between the surface of the object and the finishing tool which can create temperatures of between 10,000 and 20,000 degrees centigrade. A dielectric field is formed that continuously removes and re-deposits material to the item's surface. Metal and elemental powders can also be introduced into this dielectric stream which will cause an alloy to be deposited. That is why nozzles aren't very cheap. its also pretty time consuming to match flow a set of nozzles. your paying for labor as well as paying off that expensive machine and materials used. then there is extrude honing nozzles but that isn't all that common of a machine either. you can only get a 6.0 injector to about 75% over before its just too sloppy to get a good pintle seal. Basically all the builders, pay for the nozzles and there isn't much to be made. they aren't ripping anyone off. I only know of one injector builder in the industry with there own machine to eh nozzles. other than that they get sent off. I have played with a few sets but I am no expert by any means. I wont claim to be either. I am sorry if I came off as an a hole lol cause anyone that knows me personally knows I am far from one lol. I probably left stuff out but I have work to do. off to diagnose another 6.0. yay. [/QUOTE]