Reply by fivecodys

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Posted on Jet DC1100 Transformation ***COMPLETED***

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1425 posts in 2024 days

#1 posted 01-30-2018 08:44 PM

Nice setup. A couple of suggestions. As mentioned above the blower and SDD are spinning in opposite directions. This causes turbulence, noise and reduced efficiency. Someone in the Thein forum bent some plastic I believe, that was so tight it was a friction fit, down the throat of the SDD. This acted as an air straightener.

It quieted the system and improved airflow. I had the same situation with an old Oneida cyclone, where I made a X out of flat duct material and taped it to the vortex (center tube). It was noticeably quieter and I measured ~ 8% airflow improvement. The other suggestion is on your output, the less restriction the better. Necking down the output to 4” limits the input flow to the same amount, so going bigger will be better. Putting a 5 to 6” adapter right at the blower output and simply use cheap big box 6” duct to the outside wall. Going to 4” and having the sharp bends in flex hose is limiting your overall system performance.

Hope this helps and keep us posted on your progress!


- Carl10

Thank you Carl for the comments.

I wondered about the size of the exhaust ducting. My thought was that even though it was smaller that the 5” inlet, the absence of back flow pressure from pushing the air through a filter (bag) would kind of balance it all out. I am not happy with the elbow right at the blower but I am very limited due to the garage door track being right in the way. I did use 5” elbows to make the turn as smooth as I could but I know it’s not ideal.
I could use 5” flex hose and run directly from the blower to the vent but I will have the same 4” choke as I exit the building. If I did use the flex hose it would be a much smoother path but then there is the ripples inside the hose, so…....

I think I need an aspirin now! :)

I am interested in the baffle you made. This thing really howls when I turn it on. I have only ran it for a few seconds since I do not have the duct work hooked up yet but it is loud.

I really need to come up with a way to measure all of this so I can get the most out of this set up.

Thank you again for your comments!

-- When you leave your shop for the night, make sure you can always count to 10.

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