3D printing velocity stacks ..

Fuel tanks, fuel pumps, carburetors etc.
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Bingo
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3D printing velocity stacks ..

Post by Bingo »

As an experiment I am printing velocity stacks for my HD6 SUs.
Experimenting with dimples to affect the flow..

Flange width : 2.75”
Carb side 1 1/2”
Horn length 5 1/4”

I have metal mesh filters.

No idea as to how to honestly measure the difference in the stock plum/cleaner setup.

Pictures are of an older version..flange upside down, and smooth horn.

Pictures of the correct flange and dimples on the inside of the horn coming.
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16E4F7B5-480C-428F-8E58-189B34149D81.jpeg
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4B0CFCD2-684E-4D4F-A6DE-5874C3CC4DA2.jpeg
4B0CFCD2-684E-4D4F-A6DE-5874C3CC4DA2.jpeg (3.31 MiB) Viewed 1423 times
891AFCBE-F282-4C93-A421-00EDEF143B90.jpeg
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1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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Bingo
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Re: 3D printing velocity stacks ..

Post by Bingo »

Resin is good up to 350F.
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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Bingo
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Re: 3D printing velocity stacks ..

Post by Bingo »

file:///var/mobile/Library/SMS/Attachments/61/01/CE6E7A75-76FB-4396-BB5F-C43CED5BA271/IMG_9111.MOV

A video of the post prep .
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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Bingo
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Re: 3D printing velocity stacks ..

Post by Bingo »

Final prototype..
Correct flange
Dimples for flow.

Will paint outside surface gray aluminum
Metal mesh screens on order.
Attachments
FFEEDE79-99DA-4EF1-B5F5-6E0ABDDC58DD.jpeg
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42669214-64FA-429E-9712-C192D46B25C9.jpeg
42669214-64FA-429E-9712-C192D46B25C9.jpeg (2.95 MiB) Viewed 1408 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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Bingo
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Re: 3D printing velocity stacks ..

Post by Bingo »

Here is a flow simulation .gif from Solidworks.
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C42ECEE3-7DED-439C-B9F3-2D5D22D6507C.gif
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1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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Bingo
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Re: 3D printing velocity stacks ..

Post by Bingo »

I need to run the simulation with th3 dimples.
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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Bingo
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Re: 3D printing velocity stacks ..

Post by Bingo »

Solidworks shows the effect of the bend is significant. The bend is is less of a degree than the stock plenum. I will look at what a 1 1/2” straight stack flow looks like. Their are advantages to a taller stack .. a positive effect on top end performance.
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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jerry_hoback
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Re: 3D printing velocity stacks ..

Post by jerry_hoback »

Thats very interesting. What do the filter screens look like?
Jerry
66 3.8s #77903, 66000 miles
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Bingo
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Re: 3D printing velocity stacks ..

Post by Bingo »

Should look like the screen in this pic


http://www.pjmotorsports.com/images/bv_img1371.jpg
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DD99D435-2268-443E-AD79-D516D9AF0D52.jpeg
DD99D435-2268-443E-AD79-D516D9AF0D52.jpeg (62.67 KiB) Viewed 1384 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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Bingo
Posts: 76
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Re: 3D printing velocity stacks ..

Post by Bingo »

1st model is horn with smooth sides. More turbulence and has areas of high flows

2nd model is horn with dimples. Uniform flow over a greater area in the carb inlet.
Attachments
455F42DD-7B46-45A0-A9C0-E79467137392.jpeg
455F42DD-7B46-45A0-A9C0-E79467137392.jpeg (47.72 KiB) Viewed 1383 times
3D1F0B32-7B45-4533-8521-FB39A4799F23.gif
3D1F0B32-7B45-4533-8521-FB39A4799F23.gif (9.74 MiB) Viewed 1383 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
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