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KWT Particle Separators Specs and Test Data

KWT Filter Testing
Per ISO 5011 Standard & Beyond
This is a brief description of the KWT Filter testing per ISO 5011 standard. Testing was completed at the KWT facility, San Diego in Bay 1 adjacent to Bay 2 where satellite manufacturing and testing is done.
In order to accurately test per ISO 5011 standard it should be noted that our product requires vehicle motion to cycle dirt to the sight glass. In a lab environment no vehicle motion exists, so the filter must be vibrated to extract the dirt from the dirt collection chamber down to the sight glass where it can be accurately weighed against particles passed. If this is not done it will lead to highly inaccurate results.

Testing was performed at various engine speeds, media types (ISO 5011 Course, Glamis Sand, Talc, and heavier media encountered in a trailing position under race conditions. Two filter types exist, normally aspirated and turbo. Particle separators in general will not filter at the same efficiency over variations in RPM, particle size and humidity. For example, a humid environment will add weight to the dirt particles which has the effect of higher efficiency for a particle separator. Testing was performed in a lab-controlled temperature and humidity environment to ISO 5011 standards.
The KWT Particle Separator is particularly difficult to test since removal of all dirt from the dirt collection chamber is reliant upon vehicle motion which doesn’t exist in the lab. It is this reason the KWT filter is placed atop a vibratory plate to speed up the process of dirt removal from the sight glass post test for accurate measurement of dirt captured.
Test Results Summary
Test Set-Up
The test set-up is shown below. It consists of a KWT Particle Separator, downstream filter, RZR Filter Box (Used For Pressure Testing Only), RZR Filter (Used For Pressure Testing Only), Fan A, Fan B, Flow Probe, Pressure Probe and ancillary equipment.
Test Details

Efficiency: The KWT Particle Separator removes between 90% up to 98% of dirt ingested depending on engine speed and particulate size. Dirt types tested were ISO 12103-1 A4 Coarse Test Dust, Glamis Sand, and Dirt encountered during a trailing position in a race at engine speeds of ~100CFM up to 270CFM. Again, lab testing the KWT Particle Separator REQUIRES normal vehicle motion to cycle dirt to the sight glass.

Capacity: The KWT Particle Separator has approximately 30 cubic inches of dirt collection capacity. The capacity is enough for weeks of riding. In a recent video (Shown on KWTfilters.com) shot by a race team who uses the KWT Particle Separator, 10 races and 2 tune sessions were put on the filter before opening the sight glass. The dirt collection chamber was still not full and had plenty of capacity for more race sessions.

Restriction: The KWT Particle Separator backpressure testing was completed with a full RZR airbox, RZR Filter and all necessary flex hose. The added pressure restriction at 100 CFM was -.031psi (.81In H20) and at 270 CFM, -.197psi (5.46In H20). Dyno testing of the KWT Particle Separator on a 2019 Can Am Maverick Turbo (Below Photo) revealed negligible power loss on the Dyno results nor user feedback during street testing.