David Vizard - Which to prioritize - PORT FLOW or PORT VELOCITY?
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To me your not comprehending the point of this thread.
That chart looks like if from the Pipe Max software, and pretty sure most of the equation are too.
Go ahead, check it out see if its up to your standards.
Again I'm not making a case for these charts and equation, I'm not trying to prove them correct or not, wasn't the point of the thread.
Newbomb Turk
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Great so where's the scientific testing to back it up.
Heres a start on him
PipeMax Creator Larry Meaux on Race Engine Head Porting
"Larry Meaux has been quietly porting heads and building championship winning race engines for more than three decades. A long list of winning customers is testament to his porting and engine design skills. He is passionate about race engine performance and leaves no stone unturned when investigating and testing new theories. In this interview he has devoted considerable time to answering our questions and sharing valuable knowledge that will help other racers and engine builders. Be sure to read the entire interview. It's long, but Larry shares some great porting tips that you can apply at home. In our opinion any engine you might contemplate should be modeled in his PipeMax program to determine optimum lengths and cross sections for intake and exhaust flow paths. Get a copy of PipeMax and join the forum on Larry's web site www.maxracesoftware.com for some eye opening information on race engine performance. Larry's years of experience have made him a valuable resource for engine builders seeking to optimize power and torque in racing engines. Now he's willing to share it with you."
PipeMax Creator Larry Meaux on Race Engine Head Porting - Hot Rod Engine Tech
Newbomb Turk
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Newbomb Turk
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I know who Larry is.
Can you tell me what size fuel droplet was found to best follow the intake tract air flow? Here's a hint its in the microns.
What sort of compression ratios is he running in his engine?
Hum I wonder how rod ratio and piston motion affect velocity
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Now there's a great question!
It doesn't because my flow bench tells me air flow demand is constant and so is velocity (sarcasm)......
Tell us about the amazing droplet size you were able to conjure up in you highly trick out engine? tell us how you engineered it to the nth degree? must be an amazing journey we all can learn from.
what causes port velocity to drop off or possibly reverse
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It doesn't, that chart clearly shows there's no such thing as reversion.
Newbomb Turk
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Anyone?
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No need. Too many variables to accurately predict combustion outcomes with a simple simulation program.
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They're currently feverishly scanning DV's books to find mention of these points....
1. This thread was in opposition of what DV was saying.
2. Your the one on here being super judgmental, not DV, telling everyone that they need to up their game and build engines like the 1%'er that do highly develop R&D for the perfect combo. Which I'm pretty sure your not living up to the same expectation you judge everyone else by.
Newbomb Turk
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Maybe you should call him and tell him how fucked is he is. I’m sure he would appreciate it.
So being an unhelpful dick.
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No one said he was fucked you did. All I'm pointing out is those numbers do not account for all the variables in a running engine. If you want to use them go right ahead.
True
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