Rember the intake port texture debates?

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lefty o
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Re: Rember the intake port texture debates?

Post by lefty o » Sun Jul 23, 2017 10:02 pm

Carnut1 wrote:Super secret!
curious to se the difference after your hamster gnawed on it for a while . :lol:

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Re: Rember the intake port texture debates?

Post by Bob Hollinshead » Sun Jul 23, 2017 10:24 pm

Carnut1 wrote:Resized_20170723_202312.jpegExperiment: bone stock '65 289 heads flow them. Install heavy burr finish removing least amount of material and leaving razor sharp stock edges, reflow.

That looks like it's been blasted with 24 grit media
Pro question poster.

Carnut1
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Re: Rember the intake port texture debates?

Post by Carnut1 » Mon Jul 24, 2017 6:29 pm

Resized_20170724_175458.jpeg
Quick rough surface flow experiment. Pink pen is stock flows, swirl and Pitot measurements. Black pen is roughed surface flows, swirl and Pitot measurements. Gain is much more than I would have expected. Input welcome. Thanks, Charlie
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Re: Rember the intake port texture debates?

Post by cspeier » Mon Jul 24, 2017 6:42 pm

I just dyno'd this burr marked Holley 300-110 this Saturday on a 380cid with my 205cc CNC heads.

Image

RevTheory
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Re: Rember the intake port texture debates?

Post by RevTheory » Mon Jul 24, 2017 6:57 pm

I'm liking it. Is there any benefit to going through the process inside the plenum of a dual-plane intake? I doubt if there's much you can get to, especially the lower side.

ijames
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Re: Rember the intake port texture debates?

Post by ijames » Mon Jul 24, 2017 7:04 pm

So who will be the first manufacturer to go to gravel casting instead of sand? #-o :lol:

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MadBill
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Re: Rember the intake port texture debates?

Post by MadBill » Mon Jul 24, 2017 7:10 pm

Good one! :lol:
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.

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Re: Rember the intake port texture debates?

Post by cjperformance » Mon Jul 24, 2017 7:34 pm

Good use for spare nuts and bolts, blast them thru the runners for that good chunky finish!
Craig.

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Re: Rember the intake port texture debates?

Post by Carnut1 » Mon Jul 24, 2017 8:11 pm

20170724_200820.jpg
Laugh if you like but I think I am on to something and on iron. Bring some muscle if you want to copy!
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Re: Rember the intake port texture debates?

Post by cspeier » Mon Jul 24, 2017 8:14 pm

I won't laugh. Burr mark makes power, end of story.

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Re: Rember the intake port texture debates?

Post by David Vizard » Mon Jul 24, 2017 9:25 pm

cspeier wrote:I won't laugh. Burr mark makes power, end of story.
Chad, Charlie,

Story is not over. Advice from you guys is powering my Windsor intake post. Go see and comment.
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Re: Rember the intake port texture debates?

Post by David Vizard » Mon Jul 24, 2017 9:28 pm

cspeier wrote:I just dyno'd this burr marked Holley 300-110 this Saturday on a 380cid with my 205cc CNC heads.

Image
I would love to do it this well Mr. Guru Speier!!!
David Vizard Small Group Performance Seminars - held about every 4 weeks. My shop or your shop. Contact seminar organizer at marvingvx@gmail.com for details.

pamotorman
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Re: Rember the intake port texture debates?

Post by pamotorman » Mon Jul 24, 2017 9:43 pm

what about using shot peen like the finish on some stock HP chevy rods

lefty o
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Re: Rember the intake port texture debates?

Post by lefty o » Mon Jul 24, 2017 10:07 pm

http://www.northerntool.com/images/prod ... 0x2000.jpg
id think one of these would work fairly well in the open areas. with a little practice.

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Re: Rember the intake port texture debates?

Post by cjperformance » Mon Jul 24, 2017 11:01 pm

It would be interesting to see the effect of a very course media blasting but tested in 2 seperate ports/runners , one blasted downstream and the other blasted upstrean which would tend to bur and pickup the metal in a different direction relative to air/fuel flow.
Craig.

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