I own both the SRS Hurricane and the Motionhouse and one systems. The Motionhouse system is on my rig and SRS is in a box in the garage.
My general assessment is that motionhouse feels like “wind”, and the computer-fan based systems feel like small fans. For me, there’s no comparison in that respect.
I confirmed this again recently when I thought I had a Motionhouse HW problem (turns out the Acronis backup SW I installed was wreaking havoc on my entire system). During that problem time I used SRS as my backup wind system (I can’t live without wind anymore ). It was a real let down even at full power. Now that I uninstalled the backup SW, the Motionhouse system is backup and running.
Candidly, running Motionhouse at full speed is loud.
Do you know the model of fan / blower than Motion House uses? I emailed them and hopefully can get some info.
1.
The SRS Hurricane uses 140mm x 38mm BGear industrial fans which have a rated airflow of 308 CFM and pressure of 31.08 mmH2O at 70 dbA.
Although you can't really compare decibel levels between different companies' fans because they all measure their fan noise levels in different ways, different distances, etc., the airflow and pressure #s are usually able to be compared (as long as the company isn't lying).
That's where my question lies. I saw a video (Sim Racing Garage) that said the Motion House blowers are 4". I looked up 4" blower fans and they all seem to have an airflow rating of around 200 CFM. That's quite a bit less than the BGears' 300-ish CFM.
Also, because the fan in a 4" blower is going to be smaller than the BGears fans (4" blower: 90-100 mm VS BGears 140 mm), the smaller fans will have to spin at a higher speed to get the same airflow...higher speed for the same airflow = higher noise levels for the same airflow. Which means the 4" blowers will most likely be much louder than the BGears fans in order to move the same amount of air...and the BGears fans are already insanely loud (I've heard very similar fans before) to the point you can hear them from outside the house and it literally sounds dangerous. I'm wondering how these small 90 - 100 mm fans are providing higher airflow than those monster 140 mm fans...
2.
I read from someone that Motion House blower fans have much less "lag" than the "normal" types of fans when they spin up according to the car's speed. If I remember correctly, the comment stated both don't really have lag when they spin down (under braking) but the "normal" fans have lag when spinning up for the car's acceleration while the MH blower fans don't have this issue. Is this true or are they both about the same?
Additional thoughts:
- It would awesome if MH used 6" blower fans. That's more like a 140 mm fan. They're usually rated at 400 CFM but, because they're bigger, they can run at the same airflow levels of the 4" version but at lower RPMs which means lower noise levels.
- I haven't taken pressure into consideration, and maybe that's why MH chose 4" instead of 6" models. All things being equal, smaller fans - although louder for the same airflow VS larger fans (since they have to spin faster) - have higher pressure than larger fans.
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