Mom/wifey won't appreciate you using her house vac. You only need to assemble it for the cylinder you are working on.Īnd last tip, have a decent shop vac around to suck the shavings off the piston when you remove the head each time. And check the clearance once you have cut the new pocket. The exhaust valve clearance is usually not a problem in most motors unless you have a really wild cam and popup's.Īlso, another tip, get a light weight spring like CompCam sells for p-v checking. This is usually when the intake is the closest to the piston. Make sure you check the piston-to-valve clearnces of the intake from 10* BTDC to 15* ATDC. You can remove the valves from just one head and use that head to cut both sides. and exh.?īe nice to have a spare bare cyl. Is this what you are asking? Do you need to cut both int. I would think it would be easier to remove the cylinder head each time to swap cylinders (cutters) rather than swapping piston/rods. Also, don't make one cut and think all of the other cuts will be the same setting on the stop collar, measure each one.ĭo you have to take all the valves out or can you just take them out of one cid. Also, use an old head gasket when cutting the new pockets, this assures you get an accurate depth and don't accidently go too deep by mistake. When you go to cut the pocket with the piston in the block, take some masking tape and tape around the edge of the bore and piston. Always buy the cutter at least 1/8" larger than your valve. There is a cutter similar to the one mentioned above made by Lindy tools and sells for about the same price as the Isky tool ($125). If you have to cut a pocket in the piston that is over 50% of the valve face (1/2 of the face of the valve), then according to Isky's catalog, their cutter will not work efficently (which I can vouch for this statement). It actually did a nice job.ĩ1 LX 398w street/bracket 6.88 1/8 60FT 1.44 My friend welded a piece of a file onto the head of a old valve to make cutter that enlarged the valve reliefs. ISKY is just one that makes a special fly cut valve that fits into the cylinder head in place of the regular valve and you power it with a hand drill. Profile | register | preferences | faq | searchĬan you cut the top of the piston to make room for 202 valves while there still in the motor thanks ronnie Please notice this is a brand new message board, and you must re-register to gain access. Please join us at our NEW forums located at this location. NOTICE! The old is a read-only archive.Ĭurrently the Search function is inoperative, but we are working on the problem. Once again, I out thunk myself.Fly cut pistons help - Mustangsandmore Forum Archive So, I took the pistons out and took them to the shop and spent $150 to have it done correctly. I spent a $150 for the cutter to save taking the pistons out and a trip to the machine shop. It would work great for a conventional 90 deg. If anyone ever needs to borrow this cutter for something just let me know. After a few minutes I removed the head to see how much I had removed and the cutter had barely scratched the piston. Now, with our applications with the W motors the valve is pretty square to the piston so it is a 100% contact. Im pretty stubborn so I figured I could use the cutter with a drill motor and some pressure and sooner or later mill out the depth I wanted. Beyond this point effeciency is significantly reduced. The tools instructions say, " Note: This tool is effective for cutting eyebrow only. The Isky tool for cutting eyebrows is for cutting at an angle only.
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