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Old 12-22-2009, 09:59 PM   #1
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Default Golf *****, hot redheads, and Rob's fourth Metro...

... got me to do some Googling.

Name:  dimpledvalves.jpg
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Old 12-22-2009, 10:12 PM   #2
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The exact same reason golf ***** have dimples. They need to be hexagonal!
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Old 12-22-2009, 10:20 PM   #3
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are these intake and exhaust or just one or the other from what you have seen?
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Old 12-22-2009, 10:31 PM   #4
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Interesting...




Where's the redheads?
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Old 12-22-2009, 10:37 PM   #5
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Old 12-22-2009, 10:42 PM   #6
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In real world, I wonder if the dimples just end up trapping carbon and getting crusty?
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Old 12-22-2009, 10:59 PM   #7
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I first pondered the idea of having dimpled ports when I was in highschool, I never thought of doing it to the valves.
I was thinking strictly from a flow standpoint, but Id imagine dimpling the valves ma have some other implications
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Old 12-22-2009, 11:06 PM   #8
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Quote:
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In real world, I wonder if the dimples just end up trapping carbon and getting crusty?
+1
First thought I had when I saw them too.
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Old 12-22-2009, 11:17 PM   #9
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Quote:
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In real world, I wonder if the dimples just end up trapping carbon and getting crusty?
probably, curious about possible gains though, can't imagine it would be much
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Old 12-23-2009, 12:11 AM   #10
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if there isn't developed, laminar flow at the back of the valve, they'd do nothing.

if flow is interrupted by, say, a shaft and forced around a corner, it's probably no longer laminar at the boundary layer.

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Old 12-23-2009, 12:11 AM   #11
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better fuel economy according to mythbusters....
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Old 12-23-2009, 11:37 AM   #12
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Quote:
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better fuel economy according to mythbusters....
on the outside of a car....?
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Old 12-23-2009, 11:41 AM   #13
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I refuse to debate the topic until more red head evidence is introduced.
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Old 12-23-2009, 11:56 AM   #14
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Old 12-23-2009, 12:13 PM   #15
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Redhead?
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Old 12-23-2009, 12:58 PM   #16
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I dated a girl with a red head.. No hair, just a red head. Burnt up in a trailer fire.
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Old 12-23-2009, 01:20 PM   #17
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Quote:
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I dated a girl with a red head.. No hair, just a red head. Burnt up in a trailer fire.
no.
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Old 12-23-2009, 01:22 PM   #18
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Old 12-23-2009, 01:48 PM   #19
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yes.
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Old 12-23-2009, 03:01 PM   #20
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If regular valves carbon up, let's give it something better to grip onto.

And Y8s is an acoustical engineer, so I agree with him about the laminar flow.
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