View Poll Results: Get rid of CNC track lines on the intake runners?
Yes
21
23.08%
No
70
76.92%
Voters: 91. You may not vote on this poll
CNC track lines on intake runner
Originally Posted by Malihoochie
It was a comment made long ago. Many people don't realize that CNC machines have been around since the '70's. Technology marches along at a rapid clip. Many head gurus say the grooves left by the CNC causes a vortice, where the air getts trapped and in turn acts like a roller for the incoming air. And, to add to the mix, our top porter feels that a roughened surface (very rough) is probably better yet. Lasershops heads do look sweet tho'. Like they should be on a display for a brand of metal polish. So you think a "very rough" surface is even better than CNC marks? Is that what ur saying? So maybe I WILL be fine
Trust me, my heads are gonna be rougher than an old mans 5 o'clock shadow. 
Last edited by Xtnct00WS6; Apr 21, 2006 at 03:35 PM.
Malihoochie, Can you post pictures of Darts Wet Flow bench?
Here is a short description of it:
P.S. There wet flow bench is the most fantastic thing ever conceived for cylinder head R&D. I spent most of my time up there on that thing. Its the largest bench I have ever seen. When this thing fires up it sounds like a turbine engine spooling up. You think the pictures I had where mind blowing, think about actually watching the atomization plume as well as viewing and plotting the angular discharge of the mixture! Its simply mind blowing. I have asked Richard if I can take some pictures and video, he assures me that will not be a problem.
_________________
Darin Morgan
R&D-Cylinder Head Dept.
Reher-Morrison Racing Engines
Here is a short description of it:
P.S. There wet flow bench is the most fantastic thing ever conceived for cylinder head R&D. I spent most of my time up there on that thing. Its the largest bench I have ever seen. When this thing fires up it sounds like a turbine engine spooling up. You think the pictures I had where mind blowing, think about actually watching the atomization plume as well as viewing and plotting the angular discharge of the mixture! Its simply mind blowing. I have asked Richard if I can take some pictures and video, he assures me that will not be a problem.
_________________
Darin Morgan
R&D-Cylinder Head Dept.
Reher-Morrison Racing Engines
Originally Posted by gollum
Malihoochie, Can you post pictures of Darts Wet Flow bench?
Here is a short description of it:
P.S. There wet flow bench is the most fantastic thing ever conceived for cylinder head R&D. I spent most of my time up there on that thing. Its the largest bench I have ever seen. When this thing fires up it sounds like a turbine engine spooling up. You think the pictures I had where mind blowing, think about actually watching the atomization plume as well as viewing and plotting the angular discharge of the mixture! Its simply mind blowing. I have asked Richard if I can take some pictures and video, he assures me that will not be a problem.
Here is a short description of it:
P.S. There wet flow bench is the most fantastic thing ever conceived for cylinder head R&D. I spent most of my time up there on that thing. Its the largest bench I have ever seen. When this thing fires up it sounds like a turbine engine spooling up. You think the pictures I had where mind blowing, think about actually watching the atomization plume as well as viewing and plotting the angular discharge of the mixture! Its simply mind blowing. I have asked Richard if I can take some pictures and video, he assures me that will not be a problem.
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Originally Posted by Malihoochie
Jeff Smith from CarCraft was here last week for 3 days & is doing a big write up on wet flow.
By the way, about your comment about the vortice...
When you were referring to your top head porters and them saying that the "very rough" surface is probably better, are they talking about hand porting or cnc marks? Combination of both? Are they basically saying a "very rough" surface from something like a 40-50 grit sandpaper is even better than CNC marks?
Thanks
On The Tree
Joined: Sep 2005
Posts: 105
Likes: 0
From: Detroit - suburbs
Really rough - like hit with gravel rough. My own heads (old school small block) will be flowed very soon and the intakes were ported then "roughed" with a course carbide bit. A previous post on this site had some folks saying the blending on our LS1 heads looked crude or some such ... that was deliberate. Call it crazy, but ugly is fast!
Originally Posted by Gunnar@Patriot
Let us know when you are ready.
If you're going to get them reflowed, you might want to consider skuffing up the intakes on one head and keeping them as you have them on the other and seeing how they compare. As nice as they look now, I think u'll be holding back ur power potential with polished intake ports. I've done this w/ my heads and I *should* have results by tonight. We'll see though...
Registered User
Joined: Mar 2004
Posts: 199
Likes: 0
From: Austin, Texas
Originally Posted by Gunnar@Patriot
Pretty sure Port Pro's only hand port heads. Altering the material in the runner can change the flow of the cylinder head. If you do hand finish these, make sure as you stated before not to polish the runner. Keep in mind that any material you remove can change the flow of the head. We suggest that the heads remain the way we send them out unless the person doing the finishing has knowledge of porting. We have seen cases where "just cleaning them up" has reduced the flow on a set of heads.
Originally Posted by Xtnct00WS6
Lasershop,
If you're going to get them reflowed, you might want to consider skuffing up the intakes on one head and keeping them as you have them on the other and seeing how they compare. As nice as they look now, I think u'll be holding back ur power potential with polished intake ports. I've done this w/ my heads and I *should* have results by tonight. We'll see though...
If you're going to get them reflowed, you might want to consider skuffing up the intakes on one head and keeping them as you have them on the other and seeing how they compare. As nice as they look now, I think u'll be holding back ur power potential with polished intake ports. I've done this w/ my heads and I *should* have results by tonight. We'll see though...