|
Re: The best CNC head porting shop???
[Re: HEMIDARTS]
#1689148
10/22/14 10:39 PM
10/22/14 10:39 PM
|
Joined: Nov 2004
Posts: 3,517
pacific northwest
Stroker Scamp
master
|
master
Joined: Nov 2004
Posts: 3,517
pacific northwest
|
Modern did my SB CNC'd Eddy's
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
|
|
|
Re: The best CNC head porting shop???
[Re: Stroker Scamp]
#1689149
10/23/14 04:14 AM
10/23/14 04:14 AM
|
Joined: Jan 2003
Posts: 19,363
Las Vegas
Al_Alguire
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 19,363
Las Vegas
|
I don't use CNC ported heads. All my stuff has been hand ported. I have a couple people I use.
Well the Predator was CNC'ed originally as that is how they came. But they have been worked over by hand and picked up a bit. Actually I guess the new car has CNC ported stuff too from Muscle Motors, 440-1's to be exact but they came with the dragster.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
|
|
|
Re: The best CNC head porting shop???
[Re: 1320Dart]
#1689153
10/23/14 10:39 AM
10/23/14 10:39 AM
|
Joined: Jan 2003
Posts: 13,363
Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,363
Marion, South Carolina [><]
|
For a hemi I used Modern Cylinder Head (they cnc'd mine). FHO does really good work too. Barton does good work, but I'm not sure if they CNC them or not.  My Indy wedge heads I sent to Dwayne Porter. He does them by hand and does great work. I know Modern also CNC's pretty much any wedge head too and I've always heard good things about the results. Still don't understand why some people just have to have their heads done on a CNC machine. A GOOD head porter that does them by hand is just as good. The CNC program used is no better than the hand ported head that was digitized to make it anyway.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
|
|
|
Re: The best CNC head porting shop???
[Re: 1967dartgt]
#1689154
10/23/14 10:43 AM
10/23/14 10:43 AM
|
Joined: Aug 2006
Posts: 290
Cincinnati, Ohio
d7cook
enthusiast
|
enthusiast
Joined: Aug 2006
Posts: 290
Cincinnati, Ohio
|
So far I've had Modern do Buick Edelbrock Performers, Mopar Performers and Victors and I've been pleased. They just did a set of Stage V hemi heads but I don't have them yet.
Anymore I could not image going the hand porting route ever again. They go straight from the box to the porter.
Last edited by d7cook; 10/23/14 11:29 AM.
|
|
|
Re: The best CNC head porting shop???
[Re: 1320Dart]
#1689156
10/23/14 12:22 PM
10/23/14 12:22 PM
|
Joined: Jan 2003
Posts: 13,363
Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,363
Marion, South Carolina [><]
|
Quote:
Quote:
For a hemi I used Modern Cylinder Head (they cnc'd mine). FHO does really good work too. Barton does good work, but I'm not sure if they CNC them or not.
My Indy wedge heads I sent to Dwayne Porter. He does them by hand and does great work.
I know Modern also CNC's pretty much any wedge head too and I've always heard good things about the results.
Still don't understand why some people just have to have their heads done on a CNC machine. A GOOD head porter that does them by hand is just as good. The CNC program used is no better than the hand ported head that was digitized to make it anyway.
I'm a machinist and programmer for over 20 years now( aerospace and medical/ not engine ).
The positional accuracy and repeat-ability from a CNC is EXTREMELY hard to beat. I can see someone going in after the CNC and doing some minor touch ups only. 
That's true, but a good hand porter will make sure every port is as close as possible. Having heads CNC'd is cheaper sometimes, depending on who you go to, that's the only real plus to me.
My point is about the people who immediately cross a porting business off their list to potentially do business with simply b/c they don't CNC them.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
|
|
|
Re: The best CNC head porting shop???
[Re: an8sec70cuda]
#1689157
10/23/14 12:56 PM
10/23/14 12:56 PM
|
Joined: May 2014
Posts: 503
Idaho
1320Dart
OP
mopar
|
OP
mopar
Joined: May 2014
Posts: 503
Idaho
|
(My point is about the people who immediately cross a porting business off their list to potentially do business with simply b/c they don't CNC them.)
I see your point
Greg ----------------------------------------------------------------- Cost is irrelevant, making memories is far more valuable! 
|
|
|
Re: The best CNC head porting shop???
[Re: 1320Dart]
#1689158
10/23/14 02:39 PM
10/23/14 02:39 PM
|
Joined: Jan 2003
Posts: 19,363
Las Vegas
Al_Alguire
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 19,363
Las Vegas
|
IMO a god head porter can get the most out of any individual head IMO. As pointed out where do you think the original port design for the CNC was digitized from?? CNC work is fine for mass produced stuff. But ask how many with CNC'ed Indy or b1 stuff have epoxy in them due to core differentiations? One size fits all is rarely what I am looking for in life, just saying.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
|
|
|
Re: The best CNC head porting shop???
[Re: 1320Dart]
#1689159
10/23/14 02:45 PM
10/23/14 02:45 PM
|
Joined: May 2014
Posts: 503
Idaho
1320Dart
OP
mopar
|
OP
mopar
Joined: May 2014
Posts: 503
Idaho
|
Don't get me wrong here. I'm not trying to take anything away from the guys that port heads by hand. That's true art and patients. I feel that we need to be using technology to our advantage. Stop being afraid of it. Technology helps make power. I feel there is a lot of power to be found yet.
Greg ----------------------------------------------------------------- Cost is irrelevant, making memories is far more valuable!
|
|
|
Re: The best CNC head porting shop???
[Re: Al_Alguire]
#1689160
10/23/14 02:49 PM
10/23/14 02:49 PM
|
Joined: May 2014
Posts: 503
Idaho
1320Dart
OP
mopar
|
OP
mopar
Joined: May 2014
Posts: 503
Idaho
|
Quote:
IMO a god head porter can get the most out of any individual head IMO. As pointed out where do you think the original port design for the CNC was digitized from?? CNC work is fine for mass produced stuff. But ask how many with CNC'ed Indy or b1 stuff have epoxy in them due to core differentiations? One size fits all is rarely what I am looking for in life, just saying.
True. But with the designing and CAD software's out there, custom CNC porting per an individual head is certainly doable.
Greg ----------------------------------------------------------------- Cost is irrelevant, making memories is far more valuable!
|
|
|
Re: The best CNC head porting shop???
[Re: 1320Dart]
#1689161
10/23/14 02:52 PM
10/23/14 02:52 PM
|
Joined: Jan 2003
Posts: 19,363
Las Vegas
Al_Alguire
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 19,363
Las Vegas
|
Unfortunately castings are not all created the same. As I say CNC work is great on a large scale. Makes those cookie cutter crate motors a breeze for repeatability. I agree at the very least have the heads worked over by a true professional after the CNC work. My Predators are a good example. OK from CNC work better after a Pro got ahold of them.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
|
|
|
Re: The best CNC head porting shop???
[Re: 1320Dart]
#1689162
10/23/14 02:57 PM
10/23/14 02:57 PM
|
Joined: Aug 2013
Posts: 369
Indy
496 A-body
enthusiast
|
enthusiast
Joined: Aug 2013
Posts: 369
Indy
|
Quote:
Quote:
IMO a god head porter can get the most out of any individual head IMO. As pointed out where do you think the original port design for the CNC was digitized from?? CNC work is fine for mass produced stuff. But ask how many with CNC'ed Indy or b1 stuff have epoxy in them due to core differentiations? One size fits all is rarely what I am looking for in life, just saying.
True. But with the designing and CAD software's out there, custom CNC porting per an individual head is certainly doable.
The guy I use does hand porting and also does aluminum head repair. Last time I went there he had CNC'd B1s to repair, core shift was bad enough that that the CNC program broke through in a spot. Wouldn't have happened if a competent hand porter did the port work.
|
|
|
Re: The best CNC head porting shop???
[Re: 496 A-body]
#1689163
10/23/14 03:23 PM
10/23/14 03:23 PM
|
Joined: May 2014
Posts: 503
Idaho
1320Dart
OP
mopar
|
OP
mopar
Joined: May 2014
Posts: 503
Idaho
|
I've heard several times of the guys that port by hand breaking thru as well.
The guys that CNC port heads should have equipment at their facility that can sonic check or x-ray heads prior to machining as an extra precaution.
Greg ----------------------------------------------------------------- Cost is irrelevant, making memories is far more valuable!
|
|
|
Re: The best CNC head porting shop???
[Re: 1320Dart]
#1689164
10/23/14 04:02 PM
10/23/14 04:02 PM
|
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
|
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
|
Quote:
I've heard several times of the guys that port by hand breaking thru as well.
The guys that CNC port heads should have equipment at their facility that can sonic check or x-ray heads prior to machining as an extra precaution.
Based on some spots where the rocker shaft hold-down bolt threads are showing through on my CNC-ported heads, I'd say don't bet on it.
Sh!t happens, either when grinding by hand or w/ a CNC program on a casting w/ more core shift than anticipated.
Don't forget that just because a port design is available in CNC doesn't mean it's a GOOD port design, only a more easily repeatable one.
|
|
|
Re: The best CNC head porting shop???
[Re: Monte_Smith]
#1689166
10/23/14 04:18 PM
10/23/14 04:18 PM
|
Joined: Nov 2003
Posts: 5,160
Texas
dannysbee
master
|
master
Joined: Nov 2003
Posts: 5,160
Texas
|
Cnc heads are only as good as the set of hand ported heads that are digitized for the programming of the cnc machine.
Getting old just means you were smarter than some and luckier than others.
|
|
|
Re: The best CNC head porting shop???
[Re: Monte_Smith]
#1689167
10/23/14 04:22 PM
10/23/14 04:22 PM
|
Joined: Feb 2005
Posts: 20,174
PA.
pittsburghracer
"Little"John
|
"Little"John
Joined: Feb 2005
Posts: 20,174
PA.
|
Hand porting and porters is becoming a "lost art". CNC programers copy and use a hand ported head as a blueprint good or bad. I reworked a set of AFR cnc'd chevy heads that weren't worth crap and WAY off their advertized flow numbers. Hand porting is NOT easy work.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
|
|
|
|
|
