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5.7 piston to valve clearance....
#2329104
06/30/17 12:25 PM
06/30/17 12:25 PM
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Joined: Jun 2016
Posts: 170 Wisconsin
Medlock51
OP
member
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OP
member
Joined: Jun 2016
Posts: 170
Wisconsin
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Any known reason why the stock pistons can't be cut for additional p2v clearance when using stock pistons?
Nothing new about this as it was being done 60 years ago..
My 5.7 will need new slug to get my needed compression but a guy on a budget using stock pistons could save some cash doing this.
Last edited by Medlock51; 06/30/17 12:26 PM.
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Re: 5.7 piston to valve clearance....
[Re: Medlock51]
#2330085
07/02/17 08:47 AM
07/02/17 08:47 AM
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Joined: Jan 2003
Posts: 9,963 Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
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Check the thickness where you want to cut reliefs. I am not sure what is the minimum you need after cutting, but I bet the factory didn't put any extra metal in those stock pistons.
Last edited by gregsdart; 07/02/17 08:48 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 5.7 piston to valve clearance....
[Re: Medlock51]
#2330742
07/03/17 04:13 PM
07/03/17 04:13 PM
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Joined: Jan 2005
Posts: 12,408 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,408
Kalispell Mt.
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They have extremly thin pistons and the new material is very brittle I would not dare try to run one that way. Seems about .100 thick pistons (hard to get my caliper down there), if you cut even .050 you only have .050 left and now it has a stressriser in a very weak piston that you are bumping up the power on, very bad idea.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 5.7 piston to valve clearance....
[Re: Medlock51]
#2331216
07/04/17 10:22 AM
07/04/17 10:22 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
Posts: 1,400
Trumbauersville PA
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Don't do it, like Dave said the top on these stockers is very thin
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 5.7 piston to valve clearance....
[Re: Medlock51]
#2331931
07/05/17 02:42 PM
07/05/17 02:42 PM
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Joined: Jan 2005
Posts: 12,408 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,408
Kalispell Mt.
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still going to make a stress riser on a very thin brittle piston. .010 less valve lift is not gonna hurt as much as a busted piston.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 5.7 piston to valve clearance....
[Re: Medlock51]
#2332429
07/06/17 12:12 PM
07/06/17 12:12 PM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
Posts: 1,400
Trumbauersville PA
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Here's a stock 05 piston cut Use your best judgement, it's as thick as some of the later BB's but these 5.7 are notorious for being fragile
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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