What oil for racing Yamaha "2008" R6

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937
Location
Colorado, USA
Yes agree with “Twist of the Wrist II”, if you have one book on riding technique and psychology of riding, this is it. Still don’t agree with anything about the 10w30 mantra that is being repeated.
 
Messages
26,445
Location
PNW
Still don’t agree with anything about the 10w30 mantra that is being repeated.
Come on ... didn't you know that engine tribology is firmly based on how a 59K lb granite ball floats on KV20 of 1 cSt water, and that is a solid way to chose a motor oil for racing.
 
Messages
937
Location
Colorado, USA
Come on ... didn't you know that engine tribology is firmly based on how a 59K lb granite ball floats on KV20 of 1 cSt water, and that is a solid way to chose a motor oil for racing.
I am sure someone has stood there pushing by hand @16,000 RPM for minutes at a time and it did just fine....... Next, have 20 drinking buddies whiz on that pedestal and I bet the rock will spin. With respect, I get the principle being shared however still don’t agree with the 10w30...
 
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Messages
5,626
Location
the canyons
Come on ... didn't you know that engine tribology is firmly based on how a 59K lb granite ball floats on KV20 of 1 cSt water, and that is a solid way to chose a motor oil for racing.

Just imagine if there were some Pert Plus dumped into that water. It would be the 540RAT holy grail...
 
Messages
26,445
Location
PNW
I am sure someone has stood there pushing by hand @16,000 RPM for minutes at a time and it did just fine.......
LoL .... especially when the water supply pressure feeding the oil between the rock and it's "bearing" has to be in the 1000s of PSI. That ball of granite doesn't represent in any way how hydrodynamic lubrication happens. That 59K lb ball will still float if sitting still.
 
i do not like any of the castrol products (with one exception)

do you have an oil sponsor? you may want to look into that.

i dont like 10w50s either...requires too much vii's

6x20min is 120min or 2hrs...at 100mph thats 200mi ... that is all the more your oil has to hold up for. but it needs to do an fantastic job for the entire 200mi.

your summer temps are barely warmer than my winter temps...last week it was 79F here. today to be a balmy 69-70F out.

You must be having a hot spell. Here are the average temps for Cedar Creek, Texas. :)

96CD4000-D044-4CD0-87CC-771728095D48.png
 
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Hi All.

I dont know if there is somebody on the forum with a lot of knowledge in road racing motorcycles? Im kinda new with this and shall give a little explanation of what we plan to do.

We race a Yamaha R6 out of 2008, with extended radiator for better water cooling.

This are 6 sessions, of 20 minutes every 2 hours, so it will cool down, and then go to plus minus 16000 RPM ( programmed ECU )

I think, this will ask for a special oil, and im looking for advice in this.

Mostly, we race in summer time, outside temperature +32 celcius ( 89,6 Fahrenheit )

In the manual, it states: API SG or higher, JASO MA .

When i look at the SEA diagram, the 10w-50 will go to the highest (outside) temperature, makes that the best choice?

Here in The Netherlands, this oil is common used:

Castrol Power1 Racing 4T 10W50

I hope everybody with the knowledge can give his opinion , that will help me with my choice for a great oil :)




View attachment 39276




Engine type:4 cylinders, 4-stroke, Inline
Displacement:599 cc (36.6 cubic inches)
Bore × stroke:67 mm × 42.5 mm (oversquare - shortstroke)
Cooling system:Water cooled
Power:124.68 HP (91.7 kW) @ 14500 rpm (Ram-air)
Torque:69.1 Nm (7.05 kg-m) @ 11000 rpm (Ram-air)
Valve train:DOHC, variable
Valves per cylinder:4
Sparks per cylinder:1
Fuel supply system:Fuel injection
Ignition type:Digital CDI
Funnel diameter:38 mm
Compression:13.1:1
Engine mounting:Transverse
Lubrication system:Wet sump
Gear box:Manual 6-speed
Clutch:Wet, slipper, cable operated
Final drive:Chain
Spark plug pipe type:NGK, CR9EK
Motor oil:Synthetic, 20W/40
Hello Zilk. Do your or your friends have an idea of what the oil temperature is in the sump. ( not the temp of the cooling water). I’m thinking that at 16,000 rpm it must be 250 F or more. Any ideas? Snag
 
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