running the free flowing 30 grade oil recommended in the manual...
Choosing a 30 over a 40 is smarter because it will:
1)increase HP at the rear wheel
2)quicken the throttle response coming out of the corners...
3)decrease over all operating temps...
4)increase the oil flow at the critical bearings...
I started with a $135 compact digital oil pressure gauge p/n P210 from
Auber Instruments with a 0-150 psi or 10 bar range...
http://www.auberins.com/
Installing Auber's senor was complicated because I wanted the to keep
the stock Honda sensor that signaled the red low oil pressure light on
the instrument cluster... I engineered this arrangement...
Different threads required multiple fittings... I starter with the
hole in the engine which are BSP threads... next came a BSP to NPT
adapter... which allowed a NTP Tee for the NTP Auber sensor... finally
I screwed the BSP Honda sensor into the NPT Tee threads which held but
leaked... so I sealed it up with a custom double O ring washer...
I machined a Double O Ring washer to insure against an oil leak...
It took 5 attempts to come up with the right angles and holes before
the Delrin Clamp Mod worked like I wanted...
The 5th Delrin Clamp was perfect...
Machined Delrin clamp installed to anchor the long and ponderous Auber
sensor to the bike...
Carbon Fiber plate was used to secure the Oil Press Gauge to the
instrument cluster...
All in all this mod consumed close to 30 day of labor but it was worth
it... Now I'm able to evaluate my oil viscosity...
I choose 5W30 because it gives the right flow at the normal operating
temperature of 212ºF of the engine and that would be the viscosity of
10 at operating temps... so that means for every 1000 rpms increase
Mr.RC45's oil pressure increases another 10 psi... a 30w flows more
oil at higher rpms which flows more oil between the critical bearings
which carries away more heat and I'm not wasting HP just pumping oil
through the blow off valve...
5w30 psi
1000 10
2000 20
3000 30
4000 40
5000 50
6000 60
7000 70
8000 80
9000 90
10000 99
11000 99 blow off by the pressure relief valve
0w40
1000 12
2000 24
3000 36
4000 48
5000 72
6000 84
7000 96
8000 99 blow off by the pressure relief valve
9000 99
10000 99
11000 99
15W50 psi
1000 15
2000 30
3000 45
4000 60
5000 75
6000 90
7000 99 blow off by the pressure relief valve
8000 99
9000 99
10000 99
11000 99
Quote Mobil 1 on the viscosity of their synthetic 5 30 weight oil:
Temperature ( F )....Viscosity Flow
212ºF..........................10 (operating)
104ºF..........................56 (start up)
32ºF..........................100 (estimate)
Mr.RC45 Oil Press Gauge shows the problem with oil... it doesn't want
to flow when its cold this is 5w30 at 112º resisting at 18 psi
The same 5w30 at 203F Oil is flowing 10 psi perfect
5w30 at 8000 rpms 82 Psi close enough to perfect...
Mobil 1 5W-30
