Finding flowrate: Not sure if I'm reading my numbers correctly

Project Support
1

Hi all, I am trying to design a “velocity stack” that would improve flow into a carburetor.

Here is the baseline (carburetor intake shaft, and a pancake filter) :

Here is a standard design that is proven (on physical flow benches) to provide higher flowrates:

And here is my design:

I did a couple runs of each and mostly with these settings:

Inlet

baseline-1
baseline-11000×581 84.3 KB

Outlet - this is the flowrate for an HS4 Carb

baseline-2
baseline-21000×612 89.2 KB

I’m using the cutting plane to find the numbers, and I’m just looking at the m3/s flowrate as the result.

baseline-3
baseline-31000×591 96.8 KB

Using that number, the “stubstack_standard” provides an 13.6% increase in flow (should be around 5% on a flow bench), and with my design getting 82% increase in flow over the baseline. Which is too good to be true. I must be doing something wrong.

Thanks in advance for any feedback. I’m a total noob and never studied this; I don’t even know what e-2, e-3, etc means. I just hope with some accurate numbers, I can get more power out of my cars.

2

Hi this is Fillia, there are multiple runs inside your project, are you referring to Run 4?

3

Hi Fillia, I should’ve specified. But I think I used Run5 for those screencaps.
A lot of the runs are quite similar, just trying different parameters to get consistent numbers across the three models.
Thanks
Marco