BusyLittleShop

Nothing but the fact that this thread is on auto pilot and the captain has retired to the bar for a drink...

Unless you got calibrated eye balls good for thousands of an inch or not... the only way to record lobe wear is with a micrometer...

I attended a $200 2 day Tony Foale seminar and that program was one of the benefits... http://www.tonyfoale.com/ The name Brian Sharp doesn't not ring a bell...

Copied and saved... thanks to everyone for fixing the dip in the power band... when will Honda ever learn to quit messy up the V4s naturally linear flow of power??? first it was the silly VTEC... next it was this dip in the Veefalos's power band... mercy for the VFR riders... they ain't beginners...

Quote Mobil 1 15 50 synthetic oil... At 40ºC / 104ºF viscosity = 125 At 100ºC / 212ºF viscosity = 17.4 Quote Mobil 1 10W 30 synthetic oil... At 40ºC / 104ºF viscosity = 62 At 100ºC / 212ºF viscosity = 10 As you can see the viscosity of 125 is too thick to lubricate your engine properly during warm up and the viscosity of 17.4 builds up too much pressure during operating temps... a better choice would be the 10W 30 because now during start up the viscosity is 62 still too thick to lubricate your engine properly but lesser than the viscosity of 125... but heres the important part at operating temps you have the desired viscosity of 10... a viscosity of 10 flows more than the viscosity of 17.4 so you're more at the target of the engineers 10psi per 1,000 rpm... if we agree that flow lubricates your engine and not pressure than the 10 30 makes more sense... I understand if you can't bring yourself to trust 10 30... but... Oils are chosen by the manufacturer to give the right thickness at the normal operating temperature of the engine at the oil temperature of 100C or 212 F the boiling point of water... I think we agree that most motorcycle designers thermostat their water cooled engines to run at 212ºF water temperature with an oil thickness of the viscosity of 10. This is the real world viscosity of the oil... not the same weight listed in the manual or advertised on the oil can... we should learn the difference between those numbers as they are confusing... I want to talk about oil thickness at start up and operating temps as listed by the oil company themselves and not oil can labeling... I know this is a very difficult topic to comprehend... Everybody including good mechanic friends think they understand engine oils... but most of what I hear about viscosity is the opposite of the truth... I hear all the time that a 0 30 has a viscosity of 0 at room temp and a viscosity of 30 at operating temp but this is the opposite of the truth... fact is a 0 30 weight oil has a viscosity of 10 at operating temp (212ºF) and a viscosity of 56 at room temp... A viscosity of 56 is too thick to lubricate our engines properly... it builds pressure at the expense of flow... The confusion occurs because people think in terms of the oil thinning when it gets hot... They think this thinning with heat is the problem with motor oil... It would be more correct to think that oil thickens when it cools to room temperature and I believe THIS is the problem. If we believe that 90 percent of engine wear occurs at startup before warm up and if we are interested in engine longevity I think we should concentrate our attention at reducing engine wear at startup... In a perfect world we would have an oil viscosity of 10 at start up and a oil viscosity of 10 at operating temps but so far no oil meets that requirement...

Mercy Bailey... do you know what the viscosity of Mobil 1 15 50 is at 104ºF start up and 212ºF operating temps???

Thanks... Just for Uncle Stan I machined custom rear sets for the 5th Gen and I wouldn't be interested in duplicating the hand made effort for anything less than $800... What I mean about engineering 7075 T6 is due to the alloys weight to strength ratio a designer can machine a part thinner than 6061 T6 alloy and end up with the same strength...