stock flycut pistons + N20 = ?
08-23-2005, 01:18 AM
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stock flycut pistons + N20 = ? Who here is spraying on flycut pistons? If so, how deep are your cuts and what shot are you running successfully....
Just wondering. I'm planning on spraying about a 150 shot on my stock pistons notched about .090 intake .070 exhaust. I know it's risky, but I'm just wondering what others are doing or have done successfully.
Just wondering. I'm planning on spraying about a 150 shot on my stock pistons notched about .090 intake .070 exhaust. I know it's risky, but I'm just wondering what others are doing or have done successfully.
08-23-2005, 03:07 AM
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Originally Posted by SUX2BU
The part of the piston that gets notched is VERY thick. your ringland will go WAY before you break thru the notch.
08-23-2005, 12:47 PM
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Originally Posted by necrocannibal
Im running flycut pistons, they are notched .2 and Im spraying a 225 shot on it. I think everything will be ok.
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08-23-2005, 02:49 PM
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You'll be fine. Sardog46 used to run .080" flycut on stock pistons and he sprayed the **** out of his car turning it to 7500 rpm with the stock rod bolts. He had probably 200 passes on the way it sat.
Nate
Nate
08-23-2005, 07:31 PM
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LSxGuy widda 9sec Mustang
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Have run .180" Intake, .170" exhaust before on a stock shortblock w/250 shot. When it finally let go from running lean and running an agressive tune, it hurt rings/ring lands, no damage to valve relief areas. 
The pistons I've measured are about .360" thick where the valve relief is located before cutting, about .250" thick in the center of the piston.
The pistons I've measured are about .360" thick where the valve relief is located before cutting, about .250" thick in the center of the piston.
08-24-2005, 10:33 AM
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Originally Posted by -Joseph-
Have run .180" Intake, .170" exhaust before on a stock shortblock w/250 shot. When it finally let go from running lean and running an agressive tune, it hurt rings/ring lands, no damage to valve relief areas.
The pistons I've measured are about .360" thick where the valve relief is located before cutting, about .250" thick in the center of the piston.
The pistons I've measured are about .360" thick where the valve relief is located before cutting, about .250" thick in the center of the piston.
Holy shiat! Wow that's some great information there. Thanks Joseph. I don't even think I've heard of anyone flycutting that much before, or even needing to for that matter.
You must have had a monstrous solid cam in there or something huh?
08-24-2005, 07:53 PM
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LSxGuy widda 9sec Mustang
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Originally Posted by JF WS6
Holy shiat! Wow that's some great information there. Thanks Joseph. I don't even think I've heard of anyone flycutting that much before, or even needing to for that matter.
You must have had a monstrous solid cam in there or something huh?
You must have had a monstrous solid cam in there or something huh?
You have to remember, we really didn't give a f**k about grenading a stock motor either.
If I was spraying a motor I cared about, I would do the minimum amount needed to flycut though.
08-25-2005, 12:19 AM
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Originally Posted by -Joseph-
Yep, had a few different test setups on that shortblock. One had LS6 heads milled .090" and a fairly huge hyd. cam setup.
You have to remember, we really didn't give a f**k about grenading a stock motor either.
If I was spraying a motor I cared about, I would do the minimum amount needed to flycut though.
You have to remember, we really didn't give a f**k about grenading a stock motor either.
If I was spraying a motor I cared about, I would do the minimum amount needed to flycut though.
Just out of curiosity, what kind of compression did you get out of the LS6 heads with .090 shaved off? I would have thought that much milling would fubar the flow on those, but I could be wrong. Wouldn't be the first time.
08-25-2005, 01:55 AM
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It did loose airflow at peak, something like 15cfm down. I -think- the compression was at least 12.5-1, maybe a little closer to 13-1, I'd have to recalculate it if I can find my specs.
Stock shortblock motors are fun, you can thrash on them all you want and when they do finally die, your out a few hundred bucks if that to rebuild it the same. Now if we did the same thing with a forged motor, it probably wouldn't break to begin with, but if it did it hurts more since you know they cost a lot more than stock.
Stock shortblock motors are fun, you can thrash on them all you want and when they do finally die, your out a few hundred bucks if that to rebuild it the same. Now if we did the same thing with a forged motor, it probably wouldn't break to begin with, but if it did it hurts more since you know they cost a lot more than stock.
08-25-2005, 01:57 AM
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Originally Posted by -Joseph-
Stock shortblock motors are fun, you can thrash on them all you want and when they do finally die, your out a few hundred bucks if that to rebuild it the same. Now if we did the same thing with a forged motor, it probably wouldn't break to begin with, but if it did it hurts more since you know they cost a lot more than stock.
