I just need to know from the Dude, or any other builder, the maximum safe cut depth.maintaining the same valve to piston angle as the original relief. I'll need all the cam I can get with the new heads. 082" on the exhaust, and had plenty ont he intake(.100") I'm pulling the Comp 290B out in favor of the 300B while it's apart. I don't need much, but I don't want to go too deep either. I was curious as to the depth of the actual cut. The intake is OK, it's the exhaust that's pushed out a bit. Then the proper position of the cut can be determined based on the mark and valve diameter. I'm going to take a junk valve and grind the tip to a point.install it backwards thru the guide, and mark the center location. I got sick of it and decided to tear down and have them fly cut.the right way! I started laying the ledge back, and opening to the outside.must have had the head on and off 15 times to mock up and check clearance! Each time, I had to surgically prepare the area with tape and plastic and the shop vac.what a PITA. You will see what I am talking about when you do a clay test. The TRW/Speed Pro valve reliefs are not in the correct location as is. Looser skirt.a little slap never hurt.Darin - you need to do a clay test with a head bolted to your engine. "I tend to lean toward a tighter gap and a Also do NOT put a cordless drill on the tool, while it first glance it would appear you do, I assure you, a couple turns takes out quite a bit of material and in all likelihood you. I'd like to try this one out myself, maybe with some super squish pistons in a single port head at 12:1 compression. Number one most important thing is to Tape the hell out of the area around the piston, if not, all the shavings will go in the engine. 035, and the combustion starts inside the head, not the cylinder. The bet I've heard is setting the piston/cylinder/rod combo up for a -.040 deck (piston above cylidner top) but step cutting. 040 extra room for the piston to clear the chamber. 000 distance from piston top to cylidner top, but step cut the chamber so that there is. 040 from piston to chamber's edge (nice). 060 copper gasket to regain a distance of. If the piston sticks up out of the top of the chamber by. 060 copper gasket you've increased the distance to the chamber's edge to. 040" from the top of the piston to the top of the cylinder, and then add a. I have heard (and use) deck hieght to refer to both the distance from the top of the piston to the top of the cylinder, and the distance from the top of the piston to the bottom edge of the chamber. The other option is to cut the top of the cylinders, an equally effective option, should cost about the same but will leave more material in the head (a good thing). It removes material from the head (a bad thing). This effectively make the chambers smaller, since you are cutting away the "top edge" making the chamber shallower. Coated Flycut and Delipped Pistons SKU: CEPCFDP 600.00 or as low as 16. I was just wondering how much it wil cost to cut the stock pistons, as Im probably going to pull my engine this summer when I do the heads/cam. It moves the seating surface of the cylinders further into the head. How much to get pistons flycut Jump to Latest Follow 1 - 2 of 2 Posts. In your case flycutting the heads is one option you could take to increase compression.
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