J1MS wrote:
I think you will find it very relevent as its an air cooled barrel like Lambrettas and a PE 250 piston and Castor based oils still offer some of the best protection for 2 Strokes Plus Gordon Jennings was educating Suzuki back then, and I for one still run one of my scoots on a PE250 piston!
Note..i didnt say it wasnt relevant...i said it wasnt agood idea for a modern fully synthetic oil to run at 6.25%
The part i find most interesting from his article is the part where he alters the jetting to create air/fuel ratio parity.
Because if you run 3% mix...97% of the remaining liquid mix is fuel....and if you change to 5% mix...you decrease fuel to 95%. He alters the jets to compensate for this...to creat parity....so presumably he upjets?
My 205 Suzuki dosnt make more than 15 hp that runs at 25-1 my Quick TS makes about double that, running at 20-1, my other TS is Standard (untuned) just blended and some nice bits bolted to it, that makes around 22 bhp that running at 25-1, but If I Was running somthing exotic I would put in whatever produced the most power as we spend thousands building them and then usually guess what ratio of what ever oil will do, having never tried anything else, at any other ratio. One of the best oils I used was Belray+ at 20-1 very clean burning and on that scooter it produced the most power. But at 16-1 ratio it lost power.but it is amazing how long the oil from a previous mix can remain in the engine probably even more so with synthetic oils as its designed to cling to hot metal. and that was the main point I was trying to get over perhaps Al at Diablo could/might want to do a test like this with the modern oils, might surprise a few people with the results, cus I havnt heard of anyone else doing it yet. Readspeeds mentioned somthing last year about an oil he was testing maybe hes doing this.
I would like to do this test on my machine when I have finished my new engine, would be very interesting, I will give Al a ring and see if he is interested, maybe sticky also ???, I have a dyno run saved on Al's dyno so we could start with that, and retune the new motor and go from there. I know what you mean about the possiblity of the old oil mix "sticking" to the internals and you would need to have a clean barrel between each run, the problem is getting the barrel etc. clean to do a run, difficult with out stripping it off and cleaning it physically.
Maybe do the testing over a number of weeks changing to the new mix /ratio immediately after the dyno runs giving you a week on the new mix / ratio before it's dyno'd again.
corrado wrote:Maybe do the testing over a number of weeks changing to the new mix /ratio immediately after the dyno runs giving you a week on the new mix / ratio before it's dyno'd again.
Yeah could be a good idea, will try to arrange it when I get the engine finished, got a few mods to make
