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Dodge Competition and Performance General Dodge Competition and Performance Discussion |
04-11-2017, 09:28 PM
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#21
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Name: Drasko
Title: Too Much Time
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Location: Edgerton, Kansas
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Quote:
Originally Posted by biggy238
I like his opening statement
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As great as that rendering might look, everyone forgets that were not flowing air into every port at the same time. Intake valves are opening one at a time so the water hose theory doesn't apply as much to what were doing.
Essentially you have a constant flow of air, but only at the rate of what one of your six intake valves will allow so even flow to all six intake ports is a moot test in my drop out mechanical engineering mind.
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04-12-2017, 07:30 AM
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#22
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Name: biggy238
Title: Too Much Time
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Location: Just North of Wrong
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Quote:
Originally Posted by Drasko
As great as that rendering might look, everyone forgets that were not flowing air into every port at the same time. Intake valves are opening one at a time so the water hose theory doesn't apply as much to what were doing.
Essentially you have a constant flow of air, but only at the rate of what one of your six intake valves will allow so even flow to all six intake ports is a moot test in my drop out mechanical engineering mind.
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I understand your point, but when is the last time you adjusted the valves?
I'm sure that model was for that component only, and not the system it functions as a part of. I'm not even sure where he got the image from.
I'm certain a dynamic model would show compression and decompression of the air charge causing turbulence and waves.
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04-12-2017, 08:00 AM
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#23
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Name: CorneliusRox
Title: Seasoned Rookie
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Quote:
Originally Posted by Drasko
As great as that rendering might look, everyone forgets that were not flowing air into every port at the same time. Intake valves are opening one at a time so the water hose theory doesn't apply as much to what were doing.
Essentially you have a constant flow of air, but only at the rate of what one of your six intake valves will allow so even flow to all six intake ports is a moot test in my drop out mechanical engineering mind.
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I agree.
Also you can notice that there's far less traces going to the first cylinder than the last.
Quote:
Originally Posted by biggy238
I'm certain a dynamic model would show compression and decompression of the air charge causing turbulence and waves.
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You'd be surprised. A dynamic model still only starts at the inlet and runs to the outlets. Then you can close off ends and run it again. I don't know of any softwares that will let you run through the pulses dynamically. Or any computer that could handle that level of processing on the fly either.
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04-12-2017, 08:45 AM
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#24
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Name: biggy238
Title: Too Much Time
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It works that way in my head then. 😁
I wish I had a head and vehicle to do testing with now.
I wonder if JSP has data on this.
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04-12-2017, 09:07 AM
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#25
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Name: cetanefreek
Title: Too Much Time
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I may have a good testbed for this, my friend built an engine dyno, my engine is on it dialing it in. It already has a sheet metal intake manifold.
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04-12-2017, 02:20 PM
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#26
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Name: biggy238
Title: Too Much Time
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What would be best for measuring port velocity? I saw a photo of small tubes that insert in the air stream. I would think that venturis on each runner would be the most accurate, but difficult to assemble
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__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
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04-12-2017, 03:15 PM
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#27
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Name: cumminsman315
Title: Too Much Time
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Join Date: May 2009
Location: Missouri
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Quote:
Originally Posted by biggy238
What would be best for measuring port velocity? I saw a photo of small tubes that insert in the air stream. I would think that venturis on each runner would be the most accurate, but difficult to assemble
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That would be a pitot tube, that's how you measure velocity on a flow bench
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01 24v
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04-12-2017, 10:04 PM
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#28
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Name: Drasko
Title: Too Much Time
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Location: Edgerton, Kansas
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Quote:
Originally Posted by biggy238
I understand your point, but when is the last time you adjusted the valves?
I'm sure that model was for that component only, and not the system it functions as a part of. I'm not even sure where he got the image from.
I'm certain a dynamic model would show compression and decompression of the air charge causing turbulence and waves.
Sent from my XT1575 using Tapatalk
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It was a simplified point i was attempting to make. I did reread my post and i see how it actually reads now. Lol
I was trying to talk about just the one port flow being more important than the overall flow through that manifold. As long as you always have positive pressure, that manifold, although it shows bad flow to #6 won't actually be as bad as displayed due to basically feeding the front half, then bank half of the intake ports at a time
I will say that a front feed manifold might have some slight turbulence as 124 close and air forces itself back to 356 but probably not enough for us to worry about. This would be solved by a feed point between 3/4 on the plenum or log.
Drasko
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2018 ram 3500sw daily tow pig
1994 rclb 4x4 ram 2500 new drag truck
GONE 99 F250 SD 2wd reg cab longbed FUMMINS!!!!!
96 2500 ECLB 4x4 auto beater slow truck
96 3500 ECLBSW4x4 being rebuilt
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