More mental sparking to read this Corona Ignition system, with plasma jets instead of a spark.
http://www.federalmogul.com/en-US/Media ... _62013.pdf
http://www.federalmogul.com/en-US/Media ... _62013.pdf
acotrel said:Are you using Mikuni needles in Amal carbs ? And have you ever needed to use recessed needle jets ?
acotrel said:Are you using Mikuni needles in Amal carbs ? And have you ever needed to use recessed needle jets ?
Yep, but I bet he doesn't count his carbs, , he is one immaginative innovative & industrious son of a gun though!Snorton74 said:acotrel said:Are you using Mikuni needles in Amal carbs ? And have you ever needed to use recessed needle jets ?
The only carbs Jim uses comes in his food.
motorson said:Jim, where do you get that stuff when you are out on the road? Is 110 octane necessary for your bike? You and I talked about non-ethanol fuel down a Barber last year and you mentioned what else they put in the fuel instead of the alcohol. Stuff like benzene or ???. I still run it just because it has more BTUs per gallon than ethanol fuel and wont mess up my lined tank. Any way, maybe I missed something that has already been said in this thread but how much octane is everyone needing and/or getting away with? (I use 93 octane non-ethanol with good results.)
tricatcent said:This whole thread is really interesting, like all of the ones that Jim starts. What I would like to know from Jim is by how much his timing figures would deviate from fixed ignition timing? Especially once above about 3000 RPM. How many more degrees of advance would occur at higher levels of RPM?
I am very used to the idea that most motorcycle engines will run very well if once above about 2000-3000 RPM the timing is fixed at a certain figure. For my Norton 850 that is standard apart from running a single 38mm Amal carb I have been using 28 degrees. For Triumphs I have always used 38 degrees.
On the Norton I have a Lucas Rita ignition that is supposed to have a curve that suits the Norton quite well. On the Truimphs I have, I mainly use Boyers, the advance curve they have does seem to take a bit of the snap out of the engines, but it does reduce the tendency towards detonation. I have run Triumphs also with fixed magnetos, and mags with a centrifugal advance. There seems to be very little difference in operation really as most of the time once you are riding the mag is at full advance anyway
comnoz said:Who knows what is in it. Non-alcohol fuels use other light end products to raise the octane that may or may not be better than alcohol. Jim
pete.v said:comnoz said:Who knows what is in it. Non-alcohol fuels use other light end products to raise the octane that may or may not be better than alcohol. Jim
This is interesting. There is a 90 grade no ethenol fuel down the road from me and I wonder if it is better or worse than 93 grade ethanol blend. I ran a tankful of the puregas 90 a while back and it seemed fine but over a long time who know what it will do. And It's not inexpensive either.
I have been mixing a 50/50 blend of 110 leaded and 93 ethanol for 6 years. I feel this may be a bit overkill and not really needed. I think I'm ready to ween the bike off this blend.