The new Huskies with EFI seem to have several available options for tuning the fuel curve. It appears that +/- 20% delivered fuel load is no problem. Im thinking that high burn rate race fuels like Chevrons 111 would be a super fuel for these high CR (my manual claims my 2010 TXC 250 engine is 13.6:1) motors. The specific gravity of these fuels is slightly less than typical pump gas so the fuel load would need to be enriched slightly. 111 contains some lead so the CAT insert would need to go and I doubt that a PC V's little Audi/VW wideband O2 would last long, but....it has me thinking. Im guessing I will be the first to try this out?
Higher octane really can't hurt I guess. Just in the wallet. Lead will destroy the O2 and Cat, though.
I'd be more concerned with the distillation tables than the specific gravity – the droplet size is fixed with a fuel injector so changes in intake air temperature/cylinder head temperature and typical rpm range (for your riding style) will make some fuels better for your style and environment than others. Crispy throttle response in the cool of the morning might be a poor choice over detonation resistance in the sand and heat of the afternoon If the ignition curve was adjustable via software then you could tweak over the weak spots of your fav brand – but that’s not the case here. If you can get in with a few buddies and split up a few 5 gallon tins of different fuels. If your lucky his ride will like a different one then yours. The same can be done for different brands of pump fuel – except the season to season and batch to batch variance will drive you NUTS. I buy 150L at a time for my bike and use a fuel conditioner as soon as it’s pumped. This has been my observation from drag racing cars (race fuel) and putting my te510 where I want it on pump fuel. MAT
The O2 and CAT are removed from the bike, so Im not concerned about them. I spoke the the Chevron tech line rep about the 111 fuel. I was able to download the spec sheet for this fuel and it for sure has some lighter components in it. It is a race fuel for "street" engines so its not as if Im using Aviation fuel. I have purchased 10 gallons of it and will experiment with it once the bike has broken in.
112 I ran the blue 112 in my 310 with stock fuel settings. My plug was white as a ghost. I have richened since a will try it again. $75.00 for 10 gallons ouch.
I also run the Sunoco 112 super leaded with 4 gallons super pump. George @ Up-tite said Sunoco is the best so I do as the master said. I am gutted to without the 02/cat. 45.00 bucks for 5 gallons is steep but I don't run is every time. About every two or three tanks.
It appears throwing money at this is the only way to ensure no pinging (I'm guessing this is what you are after) and when you go beyond the octane level needed to stopping the dreaded detonation, nothing beneficial or detrimental will happen to your engine .... sort of like taking vitamins your body does not need ... it just goes out your exhaust...
Lead leaves a coating on the valve seats. It "IS" needed. So throwing money out the exhaust is what you do when you need to rebuild it and didn't have to. I listen to the Husky Guru, if he said its good, it's "GOOD".
lol... yep and lead lubs more then the valves on the top end I think... just too bad the cost is so high for this added protection ... and everyone can't get leaded gas for various reasons ...
I cant see a downside to the health of the bike buy using leaded race fuel. Its expensive, but so is your motor. Here in my town the Chevron 111 is almost 1/2 the price of Sunoco 112 ($5.90/ gal vs $9.20/gal)! Ive looked over both spec sheets for the fuels and they are so close I cant see one being "better" than the other. The Chevron actually has a higher final boiling point (by nearly 50 degrees) which might be very helpful in a motorcycle given the proximity of the fuel tank to some seriously hot items.
