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Re: who does cnc head porting ?
[Re: mopacltd]
#3041688
05/11/22 10:48 PM
05/11/22 10:48 PM
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Joined: Jul 2011
Posts: 114
napa ca
procharged 484
member
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member
Joined: Jul 2011
Posts: 114
napa ca
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Wow, that reply is out of line! You think so ? he wasn't very friendly towards my statement . Ridicule begets same.
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Re: who does cnc head porting ?
[Re: jwb123]
#3041742
05/12/22 08:49 AM
05/12/22 08:49 AM
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Joined: Jan 2003
Posts: 4,364
Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,364
Morrow, OH
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Just an observation, cnc work does not make a head flow better unless the program copies somebodies good hand work. I have owned a flow bench for 25 years, I have fixed several cnc heads that did not work, I have seen several indy cnc heads that backed up, actually flowed less after .5 lift. air speed on the short side was too high. The ones you can't fix are too large of a port and the air speed is too slow. Ask a few questions before they hit the start button. And then there is the guys I know that when they got their cnc heads back they leaked water because of small pin holes in the casting where too much material was taken out. And then there are the cnc heads that are so thin the first time they get good and warm the valve seat starts to move and the valves won't seal correctly. Don't get me wrong I have seen some really good cnc heads but ask questions about port velocity and flow numbers to expect when they are finished. Spot on! CNC is only as good as what it is being told to do. The only way to get a good a good CNC program is to copy a hand ported port. If the hand ported port is garbage then the CNC program is garbage. And that even assumes that the hand ported port was probed/modeled correctly. And the CNC is stupid - it has no idea if the castings are thin anywhere. I have a heavily ported set of 906 heads that were done by Batten years ago. That are major league cracked now. Someday when I have time, I plan on probing/modeling the bowl area and seeing what I can do with my 3 axis machine. But that will be me playing with my own stuff - not to do work for others.
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
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Re: who does cnc head porting ?
[Re: markz528]
#3041755
05/12/22 09:58 AM
05/12/22 09:58 AM
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Joined: Jan 2003
Posts: 13,535
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,535
Marion, South Carolina [><]
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Just an observation, cnc work does not make a head flow better unless the program copies somebodies good hand work. I have owned a flow bench for 25 years, I have fixed several cnc heads that did not work, I have seen several indy cnc heads that backed up, actually flowed less after .5 lift. air speed on the short side was too high. The ones you can't fix are too large of a port and the air speed is too slow. Ask a few questions before they hit the start button. And then there is the guys I know that when they got their cnc heads back they leaked water because of small pin holes in the casting where too much material was taken out. And then there are the cnc heads that are so thin the first time they get good and warm the valve seat starts to move and the valves won't seal correctly. Don't get me wrong I have seen some really good cnc heads but ask questions about port velocity and flow numbers to expect when they are finished. Spot on! CNC is only as good as what it is being told to do. The only way to get a good a good CNC program is to copy a hand ported port. If the hand ported port is garbage then the CNC program is garbage. And that even assumes that the hand ported port was probed/modeled correctly. And the CNC is stupid - it has no idea if the castings are thin anywhere. I have a heavily ported set of 906 heads that were done by Batten years ago. That are major league cracked now. Someday when I have time, I plan on probing/modeling the bowl area and seeing what I can do with my 3 axis machine. But that will be me playing with my own stuff - not to do work for others.  Exactly. The CNC machine is just the copier.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: who does cnc head porting ?
[Re: an8sec70cuda]
#3041958
05/13/22 08:58 AM
05/13/22 08:58 AM
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Joined: Jan 2003
Posts: 18,048
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,048
S.E. Michigan
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The cnc does the repetitious grunt work of making the ports the same....development is done by hand, requiring high levels of skill and experience/proper judgement. It all starts with someone's hand work being digitized.
Good luck to the OP with KG. Maybe Report back with flow sheet and pics if you can?
I've seen a few good running cars with their parts and decals on them, and there have been a few posts here about their work.
Rich H.
Esse Quam Videri
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Re: who does cnc head porting ?
[Re: ZIPPY]
#3041965
05/13/22 09:42 AM
05/13/22 09:42 AM
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Joined: Feb 2005
Posts: 20,279
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,279
PA.
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If you are smart you would ask for before and after flow numbers.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.38@138.67
Livin and lovin life one day at a time
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Re: who does cnc head porting ?
[Re: procharged 484]
#3042124
05/13/22 10:35 PM
05/13/22 10:35 PM
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Joined: Feb 2005
Posts: 20,279
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,279
PA.
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I see that you deleted my statement aimed at pittsnshyts . To get started he attacked me without any provocation f you for that and f him being a self-centered egotesticle . Ban me if you want at this point mopits is dying but I do enjoy it but not to extent of seeing the ban too used like in twitter
What the heck are you so upset about.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.38@138.67
Livin and lovin life one day at a time
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Re: who does cnc head porting ?
[Re: pittsburghracer]
#3042151
05/14/22 01:46 AM
05/14/22 01:46 AM
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Joined: Jul 2011
Posts: 114
napa ca
procharged 484
member
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member
Joined: Jul 2011
Posts: 114
napa ca
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I see that you deleted my statement aimed at pittsnshyts . To get started he attacked me without any provocation f you for that and f him being a self-centered egotesticle . Ban me if you want at this point mopits is dying but I do enjoy it but not to extent of seeing the ban too used like in twitter
What the heck are you so upset about. FORK YOU
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Re: who does cnc head porting ?
[Re: mxbeep]
#3042441
05/15/22 06:16 AM
05/15/22 06:16 AM
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Joined: Jun 2014
Posts: 3,428
Md.
carnut68
master
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master
Joined: Jun 2014
Posts: 3,428
Md.
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I need a set of Stealth heads ported, Hughes no longer does CNC porting, i wished Dwayne Porter could do them but he as well no longer offers the service, however he was kind enough to recommend me to KG engines, which i have been trying to get a hold for the last few months without any answer or replys from them.
Anyone know of a machine shop who offers CNC porting aside from the 3 mentioned?
thanks in advance
Why not have someone hand port them? Someone who knows what they're doing, someone who knows mopar?? Dwayne not doing any head porting? He did my Indy heads and I was happy with the performance improvement.
Last edited by carnut68; 05/15/22 06:19 AM.
America First!
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Re: who does cnc head porting ?
[Re: pittsburghracer]
#3042596
05/15/22 06:51 PM
05/15/22 06:51 PM
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Joined: Jan 2003
Posts: 6,187
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,187
Melbourne , Australia
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Some people think you just bolt a head down and flip the power on. Instant cnc’d head. Good luck with that.
Procharged 484, you were offended by this comment? I am trying to get my head around where the anger is coming from
Alan Jones
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Re: who does cnc head porting ?
[Re: LA360]
#3042597
05/15/22 06:55 PM
05/15/22 06:55 PM
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Joined: Feb 2005
Posts: 20,279
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,279
PA.
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Some people think you just bolt a head down and flip the power on. Instant cnc’d head. Good luck with that.
Procharged 484, you were offended by this comment? I am trying to get my head around where the anger is coming from Yep that’s the one that launched him. Lol
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.38@138.67
Livin and lovin life one day at a time
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Re: who does cnc head porting ?
[Re: pittsburghracer]
#3042828
05/16/22 02:32 PM
05/16/22 02:32 PM
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Joined: Dec 2013
Posts: 4,846
Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,846
Wichita
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Some people think you just bolt a head down and flip the power on. Instant cnc’d head. Good luck with that.
Procharged 484, you were offended by this comment? I am trying to get my head around where the anger is coming from Yep that’s the one that launched him. Lol Weird! Thought maybe I missed something a a post had been deleted. 
'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
9.92 @ 135mph with a 350 shot of nitrous and 93 octane pump. 1.43 60 ft. 3,750 lbs.
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