Flycutting regrets?
03-09-2005, 01:48 PM
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Flycutting regrets? Anyone flycut their pistons for a bigger cam and regreted doing it or messed something up while doing it? Post any bad experiences while doing this.
03-09-2005, 05:15 PM
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Just go shallow to find if the cutter is doing the actual depth that you specified. I found that the cutter was cutting approximate .038" deeper than specified. I can now run any hydraulic cam out there because I ended up taking a bit more than I intended.
Also- keep everything straight while doing it- careful not to put the exhaust cutter in the intake side.
Also- keep everything straight while doing it- careful not to put the exhaust cutter in the intake side.
Last edited by RX-Ben; 03-10-2005 at 08:46 AM.
03-10-2005, 08:49 AM
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I haven't run the engine, but I don't anticipate any problems as I've heard of a shop running deeper cuts that what I did. The deepest part of the flycut is where the strut for the pin meets the piston crown area, so there is a lot of material there.
I corrected the exhaust/intake mixup that I previously posted.
Ben
I corrected the exhaust/intake mixup that I previously posted.
Ben
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03-10-2005, 06:44 PM
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I rented the ISKY tool from LG motorsports. I only had to cut the intake valve side. Engine was out of the car. Wasn't that bad.
I think you will regret not using it if you have a big cam and milled heads... as you will bend valves and damage pistons.
What cam and heads (milled to what) are you planning on running?
-Mark
I think you will regret not using it if you have a big cam and milled heads... as you will bend valves and damage pistons.
What cam and heads (milled to what) are you planning on running?
-Mark
03-10-2005, 08:02 PM
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Cutting the small amount will not effect the balance much you will not feel it.If you ever seen a chrysler 440 crank in a balancer you would shake your head as to how that thing even runs.The crank almost jumps out of the balancer.So to anwser your question for street use don,t worry if racing i may or may not rebalance.
03-10-2005, 09:11 PM
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Even the pile of shavings from my deep cuts were very very light. I know that is about the least scientific thing that I could say, but moving assemblies are balanced to within a couple grams, and the shavings were less than that.
I flycut with the engine out of the car, (happened to be rebuilding) but I have an RX7 so it would be easy either way. The flycutting setup from FFHP had a 90 degree drill fitting so you could get the job done in an F-body.
Ben
I flycut with the engine out of the car, (happened to be rebuilding) but I have an RX7 so it would be easy either way. The flycutting setup from FFHP had a 90 degree drill fitting so you could get the job done in an F-body.
Ben
