05-29-2015, 10:45 PM | #533 | ||
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Have you been reading this thread?
Quote:
Quote:
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05-30-2015, 01:25 AM | #534 |
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05-30-2015, 01:35 AM | #535 | |
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Are you trolling? From the very post above yours:
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05-30-2015, 01:43 AM | #536 |
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The bellhorns serve a different purpose from these:
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05-30-2015, 02:16 AM | #537 |
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No, I haven't been following that closely.
But I was thinking more like this. Shark-skin surfaces for fluid-drag reduction in turbulent flow DOI: 10.1098/rsta.2010.0201 Of course, there are no scales here-- no trailing edges, so I'm not sure if it would work. @eric6 and @NotEric6, have you run any simulations?
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05-30-2015, 02:34 AM | #538 | |
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And yep, tooling costs are the issue. I think it's fairly easy to tweak your design for plastic upper plenum bits, but meh. |
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05-30-2015, 03:16 AM | #539 | |
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As its 4 in the morning and I don't feel like doing the math, I'm guessing about 100 rpm from one size to the next. |
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05-30-2015, 05:19 AM | #540 |
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@NotEric6 @nelsmar
Will you be in a position to tell me/us if this manifold will be ok to run without a tune? I appreciate it would not be optimal but for myself organising a tune takes time*. *It gets fitted locally then book a tune 350 kms away, organise the wallet, organise time off from my work, the wife's work, stay 2 or 3 nights, yadda yadda.
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05-30-2015, 06:24 AM | #541 |
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No I would really assume they would direct air flow. Let me enlighten you a little on air flow.
1. Everyone knows that if you have a rough surface it will cause turbulence, swirling and a bunch of other problems I am not going into I suggest researching port and polishing to get a better idea 2 Cylinder ports and intake ports are reshaped to enhance flow for obvious reasons once again do some research. 3 If you have a surface that is too slick air will tumble and not follow the port design resulting in hp loss Trust me I found out the hard way. I had to remove the heads and rough up the port and presto 20hp SO before you jump to trolling ask a question I'm not perfect only human and due to make a mistake from time to time but never a troll Good day sir |
05-30-2015, 07:25 AM | #542 |
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No worries
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05-30-2015, 07:45 AM | #543 |
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05-30-2015, 08:07 AM | #544 | |
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05-30-2015, 08:46 AM | #545 |
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Boundary layer is good. A little rough flows better than mirror polished.
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05-30-2015, 11:31 AM | #546 |
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Laminar flow usually flows better & with less resistance, then turbulent one. Though i don't know if that's the case here, who knows, maybe more turbulent air in intake might somehow help fuel dissipation in air, or not that applicable here with on-off pulsating flow depending on cylinder cycles and cams open/closed. Only experiments may tell, but my bet that mirror finish might be slightly better .. but will that be enough for extra work/costs?
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