- Oct 4, 2013
Starting to sound like a plan there Atlas Commando...!
A Honda 750 only did 112? Wow, now I'm not so disappointed that a modded Continental GT 500 single only managed 98 and change. I had no idea that the salt surface required so much more power than pavement to reach the same speed. Interesting!!!If I mount an assault on the salt, I would work for head porting, assuming the rules would still call me "Production". I may be wrong but it appears my stock framed stock engine Combat would run in PC 'Production Classic'. The 2017 record is held by a Honda 750 at a shade over 112 mph. I think I could do that at sea level on pavement. Up at Bonneville, hmmmm. I'm going to try and find out if I'm allowed to have head work done, plus megaphone exhausts, plus an electronic ignition. I might have to get one of my 120 lb grandsons to ride for me.......
SteveA: this oil ... https://www.opieoils.co.uk/p-807-mo...vanced-four-stroke-motorcycle-engine-oil.aspx
Is it suitable for normal road use, ie changes at 1.5k or 2k miles not just for one day at the races?
You don't need to send Motul 7100 20w50. It is already on the way. JimArguably it is more suitable for road use than the use I put it too, see Jim's comment about coping with the temperature!
I will say it again, cannot easily get Mobil 1 V Twin in the UK or France. If I could I would use it. I have very little interest in buying by the 'quart'. I need 5 litres for a oil change every 2 race meetings plus top ups.
In France the easiest 'V Twin' oil to get is Motul 7100 20w50, odd thing is it only says V Twin in the small print on the back, but to be fair the illustration on the front looks like a V Twin! This is a different oil to the one Jim is testing. Cost of sending some by post from France will be silly, but I will look at it once I have translated 4oz into ml and found a suitable bottle!.
Yes it is.Interesting that at a controlled temp., the Vtwin lasts 40-60% longer than the 300v and the XPR, but fails at a lighter pressure.
That Ravenol looks pretty darned good. Is it made for flat tappets?
I would not try to compare the spring rate to the tester pressure.OK, that makes sense.
With the head work that you did on my FA, with your spring sets, lightened rockers, etc and with the 312a, what do you think a reasonable comparable max load pressure on the followers would be to your test rig?
In the past my best experiences have been with using Mobil 1 V-twin.Jim, with all the work that you are doing, I'm wondering if you have any correlation in mind between the findings in your tests and the actual performance of an oil in the engine. You have mentioned some oils that you have found through experience that do not hold up well in the Norton and others that do.
I guess what I'm trying to determine is what is a "baseline" oil that works fine based on your experience with the engines themselves. And, with that, where does that oil lie on the test scale? If that oil works satisfactorily in the engine, there would be no compelling reason to use "better" (more expensive) oil for the same purpose. IOW, any oil that measured at/above "X" in the test would be suitable. Any thought as to what a suitable value for X based on your testing might be?