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Re: who does cnc head porting ? [Re: pittsburghracer] #3041606
05/11/22 07:25 PM
05/11/22 07:25 PM
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qc
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mxbeep Offline OP
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thanks to all for the great information, i got a hold of KG earlier today and will be sending my heads over next week.

Re: who does cnc head porting ? [Re: mxbeep] #3041680
05/11/22 11:13 PM
05/11/22 11:13 PM
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Missouri
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jwb123 Offline
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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.

Re: who does cnc head porting ? [Re: procharged 484] #3041685
05/11/22 11:40 PM
05/11/22 11:40 PM
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mopacltd Offline
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Wow, that reply is out of line!

Re: who does cnc head porting ? [Re: procharged 484] #3041686
05/11/22 11:44 PM
05/11/22 11:44 PM
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napa ca
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procharged 484 Offline
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I was hoping it might work and I would buy program but no go . The machine in question is used to manufacture medical parts for surgical tables , soon to get ISO cert for shop .

Re: who does cnc head porting ? [Re: mopacltd] #3041688
05/11/22 11:48 PM
05/11/22 11:48 PM
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napa ca
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procharged 484 Offline
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Originally Posted by mopacltd
Wow, that reply is out of line!


You think so ? he wasn't very friendly towards my statement . Ridicule begets same.

Re: who does cnc head porting ? [Re: jwb123] #3041742
05/12/22 09:49 AM
05/12/22 09:49 AM
Joined: Jan 2003
Posts: 4,067
Milford, OH
markz528 Offline
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Originally Posted by jwb123
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) 13.300 @ 101.75 mph
69 GTX (clone) - build in progress......
Re: who does cnc head porting ? [Re: markz528] #3041755
05/12/22 10:58 AM
05/12/22 10:58 AM
Joined: Jan 2003
Posts: 12,691
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
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Marion, South Carolina [><]
Originally Posted by markz528
Originally Posted by jwb123
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.

iagree Exactly. The CNC machine is just the copier.


CHIP
'70 hemicuda...8 sec street car
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'73 Chrysler New Yorker
'06 GMC 2500HD LBZ Duramax...toy hauler
'90 Chevy SS454 Silverado
Re: who does cnc head porting ? [Re: mopacltd] #3041854
05/12/22 07:09 PM
05/12/22 07:09 PM
Joined: Jan 2003
Posts: 5,990
Melbourne , Australia
LA360 Offline
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Originally Posted by mopacltd
Wow, that reply is out of line!


How is it out of line??


Alan Jones
Re: who does cnc head porting ? [Re: an8sec70cuda] #3041958
05/13/22 09:58 AM
05/13/22 09:58 AM
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Posts: 17,262
S.E. Michigan
ZIPPY Offline
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S.E. Michigan
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.





Re: who does cnc head porting ? [Re: ZIPPY] #3041965
05/13/22 10:42 AM
05/13/22 10:42 AM
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Posts: 19,189
PA.
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"Little"John
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If you are smart you would ask for before and after flow numbers.


1970 Duster
Edelbrock headed 408
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: who does cnc head porting ? [Re: pittsburghracer] #3042117
05/13/22 11:20 PM
05/13/22 11:20 PM
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Posts: 113
napa ca
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procharged 484 Offline
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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

Re: who does cnc head porting ? [Re: procharged 484] #3042124
05/13/22 11:35 PM
05/13/22 11:35 PM
Joined: Feb 2005
Posts: 19,189
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"Little"John
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Originally Posted by procharged 484

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
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: who does cnc head porting ? [Re: pittsburghracer] #3042151
05/14/22 02:46 AM
05/14/22 02:46 AM
Joined: Jul 2011
Posts: 113
napa ca
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procharged 484 Offline
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napa ca
Originally Posted by pittsburghracer
Originally Posted by procharged 484

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

Re: who does cnc head porting ? [Re: mxbeep] #3042265
05/14/22 02:06 PM
05/14/22 02:06 PM
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Oh
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parksr5 Offline
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Dave (K&G) is a very nice guy. He has my engine right now.

If it helps at all, I have a pair of his cnc ported 906 heads. Have run them for years without issue.

He advertises that his cnc'd 906 heads flow 290 on the intake. Another well-known porter on this site told me that he flowed a K&G cnc'd 906 on his bench and confirmed that they flow as advertised.

Re: who does cnc head porting ? [Re: parksr5] #3042353
05/14/22 07:01 PM
05/14/22 07:01 PM
Joined: Nov 2003
Posts: 1,710
NW Indiana
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fbs63 Offline
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All of the negative posts on CNC porting is why I suggested Scott Brown. I know he doesn't port heads but he knows the correct people that have good programs and has worked with them to improve the end product. I have had nothing but great results with his stuff.

Re: who does cnc head porting ? [Re: mxbeep] #3042441
05/15/22 07:16 AM
05/15/22 07:16 AM
Joined: Jun 2014
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Md.
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carnut68 Offline
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Originally Posted by mxbeep
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 07:19 AM.
Re: who does cnc head porting ? [Re: pittsburghracer] #3042596
05/15/22 07:51 PM
05/15/22 07:51 PM
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Melbourne , Australia
LA360 Offline
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Originally Posted by pittsburghracer


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
Re: who does cnc head porting ? [Re: LA360] #3042597
05/15/22 07:55 PM
05/15/22 07:55 PM
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Posts: 19,189
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pittsburghracer Online work
"Little"John
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PA.
Originally Posted by LA360
Originally Posted by pittsburghracer


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
6.143@110.85 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: who does cnc head porting ? [Re: mxbeep] #3042826
05/16/22 03:29 PM
05/16/22 03:29 PM
Joined: Oct 2007
Posts: 156
Southern California
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BIG DRAG Offline
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Southern California
Try Precision Cylinder Heads, Shane Studley has a new CNC machine and is doing lots of CNC heads.

714-401-7405

Re: who does cnc head porting ? [Re: pittsburghracer] #3042828
05/16/22 03:32 PM
05/16/22 03:32 PM
Joined: Dec 2013
Posts: 3,946
Wichita
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GY3 Offline
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Wichita
Originally Posted by pittsburghracer
Originally Posted by LA360
Originally Posted by pittsburghracer


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. shruggy


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

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