3D printing velocity stacks ..

Fuel tanks, fuel pumps, carburetors etc.
Post Reply
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

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.
Attachments
16E4F7B5-480C-428F-8E58-189B34149D81.jpeg
16E4F7B5-480C-428F-8E58-189B34149D81.jpeg (3.17 MiB) Viewed 4826 times
4B0CFCD2-684E-4D4F-A6DE-5874C3CC4DA2.jpeg
4B0CFCD2-684E-4D4F-A6DE-5874C3CC4DA2.jpeg (3.31 MiB) Viewed 4826 times
891AFCBE-F282-4C93-A421-00EDEF143B90.jpeg
891AFCBE-F282-4C93-A421-00EDEF143B90.jpeg (3.09 MiB) Viewed 4826 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

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
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

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
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

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
FFEEDE79-99DA-4EF1-B5F5-6E0ABDDC58DD.jpeg (3.07 MiB) Viewed 4811 times
42669214-64FA-429E-9712-C192D46B25C9.jpeg
42669214-64FA-429E-9712-C192D46B25C9.jpeg (2.95 MiB) Viewed 4811 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

Re: 3D printing velocity stacks ..

Post by Bingo »

Here is a flow simulation .gif from Solidworks.
Attachments
C42ECEE3-7DED-439C-B9F3-2D5D22D6507C.gif
C42ECEE3-7DED-439C-B9F3-2D5D22D6507C.gif (9.42 MiB) Viewed 4808 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

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
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

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
Top
jerry_hoback
Posts: 66
Joined: Tue Nov 17, 2020 12:16 am
Location: indiana USA
Contact:
Contact jerry_hoback

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
92 Sovereign #655170, 185000 miles
94 xj6 #698800, 157000 miles
04 xj8 #G31309, 75000 miles
90 xjs #166230, 62000 miles
64 3.4S #1B1644DN, about 75000 miles
01 Dodge 2500 diesel, #804385, 111000 miles, bought new
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

Re: 3D printing velocity stacks ..

Post by Bingo »

Should look like the screen in this pic


http://www.pjmotorsports.com/images/bv_img1371.jpg
Attachments
DD99D435-2268-443E-AD79-D516D9AF0D52.jpeg
DD99D435-2268-443E-AD79-D516D9AF0D52.jpeg (62.67 KiB) Viewed 4787 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
Top
Bingo
Posts: 76
Joined: Sat Sep 05, 2020 12:44 pm
Location: Maryland, USA
Contact:
Contact Bingo

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 4786 times
3D1F0B32-7B45-4533-8521-FB39A4799F23.gif
3D1F0B32-7B45-4533-8521-FB39A4799F23.gif (9.74 MiB) Viewed 4786 times
1964 S Type, 4spd, OD
2016 F Type, 6spd, convertible
1988 M6, 5spd
Top
Post Reply

Last 100 Members Who Visited This Topic. Total 162 visits

User avatar cass3958 (18), Norton (3), User avatar jaguar&mg (2), vaultsman (1), minimeadow (16), Treetrimmer (16), User avatar John Quilter (15), Rogerisleofman (11), User avatar NigelW (5), Bingo (47), User avatar Glyn Ruck (22), User avatar Tom Hoffman (1), Robbo911 (3), jerry_hoback (2)

Return to “Fuel system”

Who is online

Users browsing this forum: No registered users and 3 guests