[ace.cafe]

It is best practice to end the pipe at least the distance of one pipe diameter from the end wall of the airbox.

I think length adjustments of about 3mm at a time is good for fine tuning.

[Taurim]

I will have to measure that but I'm afraid there is not a lot of room left.
But I will try to make it as long as possible with this constraint !

[Arschloch]

I will have to measure that but I'm afraid there is not a lot of room left.
But I will try to make it as long as possible with this constraint !

That´s about the length I´ve got now in mine.....feels good.  

[Arschloch]

I've ordered a 1m long 45mm diameter aluminum tube to experiment a little more

You could cut 0.5m and send me half, I´m out of stacks and i did have to weld a piece on my stack to extend it and it´s not very smooth inside.

[Taurim]

It would cost more in transport than in tube ? But if you really need it tell me.
I did not received it yet though.

I use aluminum adhesive tape to join the tubes. It is strong enough for the job.

[Arschloch]

It would cost more in transport than in tube ? But if you really need it tell me.
I did not received it yet though.

I use aluminum adhesive tape to join the tubes. It is strong enough for the job.

Ya, I've found a tube, hopefully i find the tools to make the bellmouth.

[Taurim]

I have not received it yet 

What kind of tool did you use to make the bell mouth ?

[Arschloch]

I have not received it yet 

What kind of tool did you use to make the bell mouth ?

The batch from which you recieved the last one was made in a press with a die. Since I need now only one or two, it´s going to be this method.

https://youtu.be/cgnB4bmodv4

[Taurim]

It looks quite risky 

[Arschloch]

It looks quite risky 

It doesn't look risky, it looks crap. I've never done it this way, it probably it won't work with the dimensions i want and I do something different. 

[ace.cafe]

It doesn't look risky, it looks crap. I've never done it this way, it probably it won't work with the dimensions i want and I do something different. 

3D print.

[Guaire]

3D print.

Velocity stack, 40mm length and 3D print it?!

[Taurim]

You can even print an adjustable velocity stack 

[ace.cafe]

Velocity stack, 40mm length and 3D print it?!

Print the flare with a base that you can sleeve on to the pipe you want to use, and cut the pipe for various lengths to try with the same flare on the end.
Make one flare and use it on any pipe length you want to cut. Instead of making a whole new stack for every length you want to try.

[Arschloch]

Print the flare with a base that you can sleeve on to the pipe you want to use, and cut the pipe for various lengths to try with the same flare on the end.
Make one flare and use it on any pipe length you want to cut. Instead of making a whole new stack for every length you want to try.

...my thinking, exactly.