The testing machine is now thoroughly tested and all steps are PLC controlled so everything is accurate and repeatable.
Today was the first full day of running the long testing procedure and I like the results I am getting.
The testing is done with a set load at 220 degrees for the first 30 minutes. This stresses the oil under high shear conditions and gives a good indication of the heat produced by friction.
Then the temp is raised to 320 degrees and the load is increased until a scar is produced on the follower. The test stops at this point and data is collected.
The red trace is follower pressure.
The black trace is follower temperature. The difference between the follower temp and the target oil temp is a good indication of heat from friction.
The green trace is friction.
The violet trace is cooling fan cycles. When it is high, the fan is on and it shows oil temp. When it is low then the oil is at the target temperature.
For use in a moderately tuned street performance Norton I would suggest a minimum load capacity of 150 lbs. Low friction is a plus, particularly in warm climates.
I have added one more sensor reading to replace cooling fan duty. This is a calculated number for heat from friction.
Less than 1 would be insignificant heat and friction -very good as long as this does not go along with a load rating that is too low.
~1 to 5 would be a good range in an air cooled motor.
10 would be severe heat.
Here are the first 7 tests done, in no particular order.
__________________________________________________________
Redline_20W60_Motorcycle
119 lbs load
No data for heat from high pressure shear
.017 heat from friction
Very low friction
OK for wet clutch use
__________________________________________________________
Motul_300V_20W60_Le Mans
126 lbs load
No data for heat from high pressure shear
.008 heat from friction
Very low friction
Not OK for wet clutch use
__________________________________________________________
Mobil_1_V-Twin_20W50
178 lbs load
2.48 heat from high pressure shear
.286 heat from friction
Medium/Low friction
Proven to work well in moderately high performance Nortons
OK for wet clutches
__________________________________________________________
MPT_20W60_Motorcycle
216 lbs load
1.47 heat from high pressure shear
.01 heat from friction
Very low friction
OK for non-metallic wet clutches
Low friction and good load capacity make this a good choice for a Norton
__________________________________________________________
Royal_Purple_XPR_20W50
137 lbs load
No data for heat from high pressure shear
.036 heat from friction
Very low friction
Not OK for wet clutches
The load capacity is too low at high temps to recommend it for a Norton.
_________________________________________________________
Amzoil_20W50_Motorcycle
132 lbs load
No data for heat from high pressure shear
1.08 heat from friction
low friction
Medium/low heat from friction
OK for wet clutch
The load capacity at high temp is to low for a Norton
__________________________________________________________
Castrol_GTX_20W50_API-SN
257 lbs load
3.97 heat from high pressure shear
7.87 heat from friction
High heat from friction make this oil best used in a Norton in cool climates.
More coming up soon.