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Flycutting Pistons?

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Old Jun 28, 2004 | 08:51 AM
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Question Flycutting Pistons?

Does anyone know whats the max you can flycut your stock pistons while staying on the safe side?
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Old Jun 28, 2004 | 11:17 AM
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70 thousands is what I have been told in the past
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Old Jun 28, 2004 | 12:38 PM
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Originally Posted by xxC5TNTxx
70 thousands is what I have been told in the past
Thanks. Anyone else?
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Old Jun 28, 2004 | 07:56 PM
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Originally Posted by 01midnightss
Does anyone know whats the max you can flycut your stock pistons while staying on the safe side?
My motor personally has 60 thousandths taken off and I'm currently spraying a 175 shot through the motor with no problems at all. I also know someone with 90 thousandths off spraying around a 200 so I say it's all up to you.......do you plan on spraying the car?
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Old Jun 28, 2004 | 08:08 PM
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Originally Posted by '01 WS6 TA
My motor personally has 60 thousandths taken off and I'm currently spraying a 175 shot through the motor with no problems at all. I also know someone with 90 thousandths off spraying around a 200 so I say it's all up to you.......do you plan on spraying the car?
Nope. N/A
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Old Jun 28, 2004 | 09:43 PM
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I have cut over .125" reliefs in the stock pistons without any problems. I wouldn't recommend going much more than this though, even though the stock piston does have quite a bit of material in the area where you are actually cutting the reliefs.

.060"-.080" is a pretty safe amount.

Jason
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Old Jun 28, 2004 | 10:22 PM
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Originally Posted by 01midnightss
Does anyone know whats the max you can flycut your stock pistons while staying on the safe side?
I READ G.M STATED.80 CLEARANCE.
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Old Jun 28, 2004 | 10:44 PM
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To be safe 80 tops. If you need more then buy aftermarket pistons with 2cc valve relives.
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Old Jun 29, 2004 | 11:00 AM
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i cut .125 thou off my pistons no problems so far
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Old Jun 29, 2004 | 11:03 AM
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I'm running .100 cuts on mine.. only been about 3,000 miles.. but all is well.
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