Stupid question, flycutting???

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Dec 10, 2004 | 09:23 AM

HAMRHEAD

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Stupid question, flycutting???

What the hell is flycutting? I searched but never really answered my question. Is it shaving the top of the piston? How is that done and how much is taken off? Is there a right up about it anywhere?

Dec 10, 2004 | 11:03 AM

LawmanSS

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Flycutting is when you cut a valve relief into the top of the piston. It is typically done with a valve-shaped cutting tool and a blank cylinder head used as a guide...Mikey at Rapid Motorsports flycut my pistons with a valve relief of about .050. I don't know of any write-ups, but hopefully the experts will chime in on what the maximum amount you can safely cut on the stock LS1 pistons.

Dec 10, 2004 | 11:36 AM

HAMRHEAD

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That's the best answer so far. Thanks!

Last edited by HAMRHEAD; Sep 9, 2008 at 10:44 AM.

Dec 10, 2004 | 03:08 PM

GTS346

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So they do the cut with the bottom end still assembled?

Dec 10, 2004 | 03:10 PM

xfactor_pitbulls

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Quote:

Originally Posted by GTS346

So they do the cut with the bottom end still assembled?

Basically everyone out there cuts in the cylinder with the blank head for a guide. Max cut is different depending on who you ask and application. But have heard as much as .110 I am cutting mine this winter and am going to go .080. Hope that helps.

Brandon