Ive been seeing quite a few of these on videos ive been watching..

Mostly on SR20, 2JZ, RB motors and some Rotaries.

what is the benefit of putting a velocity stack on the turbo?

 

it allows the air to enter the turbo w/o restrictions...aka it removes the turbulence by slowly increasing the air's velocity as it enters the turbo....theoritically making it take in a better intake charge

 

They really do help a lot ive heard, its just like opening up the hole on the turbo by a bunch-- I just made an airbox and put the velocity stack in it with a pipe running to the turbo, its not done yet but it will be tuesday. I dont have a camera so I cant take pics. I do have a extra velocity stack though cause it was a set of 2 I got. 2.5" small side, and it flares out to 4.5". Im gonna make a thread soon I was trying to get like $20 for it if youre interested, its aluminum btw.

 

here it is: https://honda-tech.com/zerothread?id=1788910

 

i was thinking about the BPI stack it shows wonderful gains in the all motor forum and i was curious on how it would perform with a Turbo application

 

yeah I was looking at that one too, im sure it would help a lot