 Porting a type 4 head, Not much of a short side |
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| Shivers |
 Sep 9 2024, 08:42 AM
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#1
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Senior Member  Group: Members Posts: 3,335 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California  |
I moved this from the Paddock, thought I put it here. Because the port is almost straight, with little long side short side turns, with what there is , do you find it necessary to slow the flow down on the “short side” to get good flow out of the valve. I was reading about something mepstein posted a picture of. Small divots, like a golf ball. So I’m going to do that on the long side, just wondering if there is any reason not to also do it on the short side. Thanks guy’s smile.gif
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| live free & drive |
Sep 10 2024, 09:59 PM
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#2
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Member Group: Members Posts: 212 Joined: 29-June 16 From: New Hampshire Member No.: 20,159 Region Association: None 
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This video explains more clearly about how dimples effect airflow in a cylinder (tube) - about halfway through the video:
https://www.youtube.com/watch?v=KzXcglAhxps |
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| Shivers |
Sep 10 2024, 10:06 PM
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#3
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Senior Member Group: Members Posts: 3,335 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
QUOTE(live free & drive @ Sep 10 2024, 08:59 PM)  This video explains more clearly about how dimples effect airflow in a cylinder (tube) - about halfway through the video: https://www.youtube.com/watch?v=KzXcglAhxps Thank you, I'll watch it tomorrow. I'm better in the morning (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/sad.gif) |
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Posts in this topic
Shivers Porting a type 4 head Sep 9 2024, 08:42 AM
Superhawk996 FWIW the intake port isn’t the bottleneck to flo... Sep 9 2024, 11:07 AM
Shivers
FWIW the intake port isn’t the bottleneck to fl... Sep 9 2024, 12:21 PM Superhawk996
Thanks for the pictures, so far not seeing any s... Sep 9 2024, 12:52 PM Shivers
Thanks for the pictures, so far not seeing any ... Sep 9 2024, 01:28 PM burton73 @Shivers
Just so you can see the HAM RAT head on ... Sep 9 2024, 11:29 AM rfinegan Here is a pic 2.0 Porsche heads for my intake. Not... Sep 9 2024, 11:43 AM rfinegan @burton73 can you post a pick or 2 of the chamber... Sep 9 2024, 12:14 PM burton73
[b]@[url=http://www.914world.com/bbs2/index.php?s... Sep 9 2024, 06:05 PM 914werke Bob do you have pics of the exhaust? Sep 9 2024, 12:17 PM Superhawk996 Take a look at this thread and exhaust port cutawa... Sep 9 2024, 12:36 PM Shivers
Take a look at this thread and exhaust port cutaw... Sep 9 2024, 01:45 PM Shivers Why golf balls are dimpled. ... Sep 9 2024, 03:57 PM Shivers Calabria says the optimal surface coverage with di... Sep 9 2024, 04:09 PM Shivers @burton73
Thanks Bob :) Sep 10 2024, 08:23 AM Shivers It tells me that someone that knows a heck of a lo... Sep 10 2024, 01:57 PM infraredcalvin If I’m understanding correctly, there is a short... Sep 10 2024, 07:37 PM Shivers
If I’m understanding correctly, there is a shor... Sep 10 2024, 09:21 PM Shivers
This video explains more clearly about how dimple... Sep 11 2024, 08:20 AM technicalninja
This video explains more clearly about how dimple... Sep 11 2024, 08:00 AM technicalninja I'd always wondered IF the dimples would help ... Sep 11 2024, 09:44 AM Shivers
I'd always wondered IF the dimples would help... Sep 11 2024, 12:22 PM nivekdodge take blowgun, place golf ball on top , in the air... Sep 11 2024, 11:47 AM burton73
take blowgun, place golf ball on top , in the air... Sep 11 2024, 12:35 PM Shivers
[quote name='nivekdodge' post='3166959' date='Sep... Sep 11 2024, 01:28 PM Shivers I was thinking about what that guy was saying abou... Sep 12 2024, 11:35 AM Superhawk996
Hmmmm
Better dimple those velocity stacks :poke... Sep 12 2024, 04:09 PM Shivers
Hmmmm
Better dimple those velocity stacks :pok... Sep 12 2024, 04:30 PM rfinegan @burton73
Thanks for the pics of the 2.0 chambers... Sep 12 2024, 04:22 PM Superhawk996 Caveat - these are the 2.0L AA Chinese head casti... Sep 13 2024, 05:41 PM |
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