Velocity Stacks - What they do and how to make them... a.k.a. Air horns, ram pipes, air trumpets....

What hand brake set up do you use on your mini? Good fun! Thanks

Is Fuell economy much worse???

Would you do a tutorial on how to setup the cfd tests in simscale?

Its easier to make air filters . Common practice on F2 sidecars . Common OEM filters produce less than 25 mm drop across them . Most filter mediums are commonly available . Stainless steel mesh is pretty cheap as is aluminium if you don't have a lathe for spinning or a 3D printer and your happy with your existing stacks . The radius of the inlet is more important than any other part of the design .

Great info here

more m edeling is heck cool

by the way what was the program for the flow simulation?

Hi! i´d like to ask you if what you have in your print bed is kapton tape. And if it is, did it give you a good resault? with wich materials?
I´ve been thinking on giving it a try.

Cool channel!

hell yeah more modelling

I e made some velocity stacks for motorcycles na Frye funny thing is I always beat the stock stacks by at least 8-10hp. I’m not sure why I get a consistent range above stock but when compared to another version that was almost 300 bucks, I beat those as well hands down. I’ve noticed most people use a rounded trumpet end but line are pretty sharp. Maybe it allow the air to be cut and sucked in faster. Anyways, multiple dyno pulls back to back and mine stay above the 8-10 HP gain from stock. Stacks are so much fun to design. It’s amazing how radical you can make the design and get the exact same performance from.

Hell yeah - more modelling.

Hell Yeah! More Modeling!

Hell yeah! More modelling

What 3d printer do you use? I know it's an ender 3 but any particular model?

OOh Hell Yeah More Modelling

This is probably gonna be a very stupid question, but how would swirls in the velocity Stack ( like rifling in a gun barrel) affect air flow?

Ps: I know nothing very little about engineering.

I'm doing similar things as you with my printer. I also have a CNC mill. I use both. Recently brought a Bambu Lab CX1 and I can't recommend it highly enough. Its been 100% hassle free, just plug and play.

How did you ste up the simscale? I've been trying get mine to work all day. What's your boundary conditions?

No dyno comparison???

Do you have the file for those? I use fireblade throttles as well, and dont have the stacks for it

Good video. I like cars. I like 3d printing. I like modeling. Was going to make my own velocity stacks, too. Good to know about ASA as I've just started printing with it and I'm liking it

The conanda effect makes air follw any curve so if you blow air on your table with hair dryer and it edge is rounded the air will flow down!
So on a V stack that curve grabs alot more air and smoothly !

Dude you a great driver, like a stunt driver

I would of thought a dyno would tell you if there was an improovement,stack verses no stacks. I like many ,would be interested in the results.

useless information, no dynotest results, no flow bench results..

Mad rally cross skills mate, cheers!

Very nice, I have an ender 3 also, could you share the settings you use for printing ASA?

Hell yeah, more modeling

Hell Yea, More Modeling

If you really want to learn about individual runner intakes, you really should get some motorcycle tuning publications.
At present, your 're-inventing the wheel' from stuff that's been out since 1940's (P.E.Irving, Tuning for speed, 1948)
David Vizard has been publishing articles since late 1960's plus has many tuning books that apply to any four stroke engine
There are plenty of formula to calculate tuned intake length rather than just guessing +/-10mm.
You need valve events to use formula though (intake open/close, exhaust open/close)
It's also well known that a taper will spread the effect of a tuned length over a wider RPM range so making tuned length less critical to mm changes

how did you do te simulation? I have my own 3D model of velocity stacks and I can't figure out how to do a flow simulation on simscale

Hell yeah..more modeling!!

Great video!!!!!!!!

Hello, I bought some velocity stacks for my motorcycle but I didnt know when buying them that they fit over the throttle bodies instead of sitting flush with the throttle bodies. This is now creating a lip for the air when transferring from the velocity stack to the throttle bodies. How bad is this? Should i get some new ones that do sit flush with the throttle bodies? Thanks!

NO they don’t! Dyno testing proves they don’t do a dang thing

Hell yeah, more modeling. But maybe in a separate (linked) vid

Doubt they make a difference with the filters overtop as the air is diffused within it but maybe

Hell yea more modeling

Hi, great videos. I have a question.
Is the intake runner length more important than velocity stacks? Or are both combined a better option?
Bowlings intake runner calculator says i need a runner length of aroun 13.75 inches.
Thanks

Hell yeah love this stuff old trackrscer

HELL Yeah!s

maximum CFM is afforded by an elliptical bellmouth. the ellipse is the most aerodynamic shape for this purpose. a simpe radius is not as affective at eliminating vena contracta.

basic principles such as these do not warrant internet time, or bandwidth, or video. lets get down to the nitty gritty and have a proper technical discusssion. this beginner-level bullshit is simply a waste of everyones time.

Ugh. Another useless clickbait arrow in the thumbnail. Instant downvote,

@MakingforMotorsport Did you ever make the video about explaining how pulse tuning works?

What temp did you print the apolo x at.
Is your ender 3 modified.
Thanks in advance

Bro, I have a HUGE armoured car heist planned and I need someone with your driving skills, get a hold of me I got a million dollars with your name on it.

Just kidding... But you're driving skills are top notch just like your videos. I always enjoy them, thank you for taking the time to share your knowledge and expertise with us.

Know you are a blessing.