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Re: drilling holes in piston
[Re: BradH]
#1246350
06/06/12 07:34 PM
06/06/12 07:34 PM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Is that procedure even done anymore? I remember it from years ago but nothing in the last few years..
I am truckless..
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Re: drilling holes in piston
[Re: slantzilla]
#1246354
06/06/12 11:30 PM
06/06/12 11:30 PM
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Joined: Jan 2003
Posts: 75,050 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,050
U.S.S.A.
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Quote:
Quote:
I bought my 440 from a member here and the pic of the block with the heads off shows a hole in the center of each piston.
That is a machining dimple from centering the piston. I would hope it does not go all the way through.
To the OP, if you don't know what you're doing, gas porting is a very quick way to ruin a good set of pistons. Google will be your friend for sure.
what he said
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Re: drilling holes in piston
[Re: Cab_Burge]
#1246356
06/07/12 03:38 PM
06/07/12 03:38 PM
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Joined: Jan 2004
Posts: 289 Toronto, ON
ehbody
enthusiast
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enthusiast
Joined: Jan 2004
Posts: 289
Toronto, ON
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Stupid question. But what does "gas porting pistons" do?
Shawn
70 AAR
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Re: drilling holes in piston
[Re: ehbody]
#1246358
06/07/12 03:57 PM
06/07/12 03:57 PM
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Joined: Jan 2003
Posts: 75,050 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,050
U.S.S.A.
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Quote:
Stupid question. But what does "gas porting pistons" do?
It puts compression pressure behind the ring forcing it against the piston and the bore for a better ring seal. I have a set of JE pistons that had it done. Only negative thing is once the holes get filled with carbon it's the same as a piston with no holes drilled.
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