Intake Manifold Porting Show ‘n Tell

[frnkeore]

Another thing I note about ported plenums, is that most of the dividers, come to a fairly sharp point.

I've studied aerodynamics a bit, and at subsonic velocity's, a full radius works better than a sharp leading edge. Is this just a case of the need for CSA out weighs turbulence?

[juuhanaa]

As far as radiuses, dry flow + wet flow = bigger picture.

[Lloyd klem]

Another thing I note about ported plenums, is that most of the dividers, come to a fairly sharp point.

I've studied aerodynamics a bit, and at subsonic velocity's, a full radius works better than a sharp leading edge. Is this just a case of the need for CSA out weighs turbulence?

Some instances you have 2 ports flow way different and you can make leading edge work to advantage..Run it and look at where fuel trails or coloring is and adjust from there.Everything I work on csa and overall shape is king.Everything else is way below that.

[brentry]

just want to understand all the things I see on a dyno.

What about things you see in sim.
Havnt you ever chased something on the dyno you saw in sim. I know guys that have and found that power. Didn't happen 1st try.

[ChopperScott]

AFR 4811PM…

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[Lloyd klem]

Cut m in half boys.

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[Lloyd klem]

Don't be afraid to do some testing and some of your own math on what long runner should have for more csa,taper etc.Most manifolds it should be pretty visible difference.You never learn if you don't try.

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[NXBOY]

Any Ford bigblock guys here?? We need more help with manifolds hen any of you all lol.

[NXBOY]

Any Ford bigblock guys here?? We need more help with manifolds hen any of you all lol.

[Lloyd klem]

Just finishing up manifold for 1300 hp 11 deg BBC dart heads.Guy got a little wild and cut some good gutters into walls and above port roof entrances.Had to resize runners and some epoxy work to fill his trenches.

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[mt-engines]

PROFILER HITMAN 2.600 carb

[Lloyd klem]

PROFILER HITMAN 2.600 carb

That has some area.Guessing that not for pickup pulling a camper.lol

[Joe-71]

BBFs are available. The High Riser before and after flow figures, RPM before and after flow figures. Joe-71

[1980RS]

Here's my Dart intake I 've messed around with a few times, it's never performed very well at the track. Even my Air Gap makes more power.

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[ChopperScott]

A lot of good info...

http://garage.grumpysperformance.com/in ... d-test.58/