Oil Pressure Tests
Stock (or Standard) Compared to Spin-On Oil Filters
Kawasaki Concours
Dan Bergmen May 22, 2005
Prior to the installation of the Spin-On Oil Filter Adaptor Kit on my
Concours, I ran significant oil pressure tests with the stock (or
standard) paper cartridge oil filter apparatus. I ran these tests both
hot and cold, low speed and high speed (to redline many, many times).
Test Conditions:
- Ambient air temperatures during the tests ranged from 65-75 degrees F.
- Oil in test bike is 10W-40 Mobile One MX4T motorcycle
Synthetic-recently changed.
- Oil Filter is stock Kawasaki (PN-16099-003)-recently changed.
- Test ride ~ 30 miles in length.
Test Apparatus:
- Plug, Main Gallary, Kawasaki PN-92066-1096 (modified by drilling and
tapping to accept 1/8-27 tapered pipe fittings).
- 24 inch section of high pressure flexible oil tubing.
- 0-160 psi Marsh 2 3/4" diameter dial-type pressure gauge
- 2003 Concours with 26,000 miles on the odometer.
Operational Tests and Test Results:
At cold startup the oil pressure started at 20 PSI at 1,000 rpm idle
speed. It would quickly rise to 50 PSI as I slowly raised the rpm to
about 2,000 rpm. The relief valve opened at that point and the oil
pressure would not rise above 50 PSI.
Once on the road, pressures began to decrease as engine temperature
increased. At full operating temperature (15 mile ride to turn around
point) the numbers were quite different (engine rpm change rate same as
cold startup above):
> 7 PSI at 1,000 rpm idle speed.
> 17 PSI at 2,000 rpm.
> 30 PSI at 3,000 rpm.
> 40 PSI at 4,000 rpm. Relief valve opens here and it is 40 PSI from
here to redline.
Several runs were made to redline with continuous monitoring of oil
pressure. There was no adverse fluctuations or unusual changes in
monitored oil pressures during these runs.
After this test, I removed the stock (or standard) oil filter apparatus
and installed the first prototype Spin-On Oil Filter Adaptor Kit with a
Bosch 3323 Spin-On Oil Filter.
All tests were re-run exactly as above with exactly the same results.
Several spin-on oil filters were tested and all showed the exact same
results.
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