Vacuum up the aluminum dust each time you pull the head to rotate the piston to TDC.Īnother tip, gel paint stripper from Home Depot removed the carbon from the piston tops and head gasket residue beautifully. Stick the valve with sandpaper into the valve guide and use a binder clip to keep it from falling out, and set the head where it goes, chuck your cordless drill to the valve and grind for a bit. I masked off most of the block head surface with blue painters tape and did each piston by rotating the engine. I instantly had 8 new intake fly cutting tools. Tracing around them with a pen, with the whole mess sitting on a section of the news paper for soft backing, practically die cut the sandpaper into perfect circles. how to do that? Since I was also replacing all the valves, I cleaned up the old ones and super glued them to the back of 220 grit sandpaper. Each tool can be ground differently to suit the different needs of. In effect this gives me two passes in one. I set the first tool at a height suitable for a roughing cut and the second tool gets set an amount lower to act as a finishing cut. You must be on the top edge now.After I pulled the heads to upgrade to Lunati link bar high RPM lifters, I thought gee, I should fly cut these pistons since I was installing an LG G6X3. The tool at the larger radius will hit the work first on each revolution followed by the second tool. What will the cam do for your application CB. Put the cutter into the head with some oil on the pilot and bolt it down, making sure one of the blades is hanging at the lowest point. Take masking tape and also cover the coolant holes. ( I actually assume that CB knows this but include the comment for the larger forum. Take masking tape and tape all around the edges of the piston so nothing can fall into the ring area. I have seen the reliefs in stock diesel pistons so it must be standard operation for some applications. If you use a cam that lifts the valve higher while the piston is at top dead center, it is an absolute must. When its all done, you just plunge the adjustable cutter and set the. Your question seems to be is the flycutting worth while. PISTON FLYCUT TOOL INSTALL PISTON FLYCUT TOOL UPGRADE This sounds like a lot of work, but if you cant make a vice like this, you really shouldnt be cutting valve pockets This whole set up is cheaper than most of those elaborate skirt killer vices that are out there. I don't know if the valve guides are precisely the same highth. The stop I see in the picture would set the depth of cut the same on a jig. If you made a jig to use with the head off where you could see the cutting and lubricate the cut with kerosene, I am sure you could make the cut without clogging. It's cuts the notch wider, but it won't cut any deeper than the original relief. It's just like a valve with a cutter on the bottom. You are already at the point with power upgrades where a gnats a$$ will make a difference in result. I had almost zero clearance with this cam with AFR 2.02 valves. Uneven depth from cylinder to cylinder will give differential performance between cylinders. Too much depth and you start to loose compression ratio. Whether it is done with the 'hand job' or in a mill, you want the depth to be exact. ) Just because someone is a machinist, doesn't mean they have the level of experience to do the job you want. (Performance upgrades and the machining that goes with it. Tool & Cutter Grinder The Universal Tool. I would also find someone (a shop) where that is their specialiality. But, you also see single point form tools referred to as fly cutters on mills, for example a form tool This U. As a machinist, I would go with 'out of the engine'.
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