Just wondering. I've always used premium, but of course you should always put the lowest octane you can in that will not cause pinging or knocking. Has anyone used 85 out here and had their engines knock? Bike intakes being what they are I don't know what the differences would be to a car combustion-efficiency-wise, but if people are getting away with 85 I may start running it to get a bit more power.
try not to, i usally use like 91 little more expensive but when a bike fills up its only like what maybe a $1 more.
If guns kill people then i can blame my pencil for mis-spelled words!!!! (Larry the cable guy)
Right but what I'm saying is, higher octane fuel actually results in less power since it inhibits combustion to prevent knocking (burns slower). Don't confuse high octane with the race gas, it's not the same stuff.Other than a higher octane rating there isn't a difference in quality of gas with 85 or 87, so if people are getting away with it at Denver altitudes I'd like to know... At sea level I'd still run premium, but up here I think it may actually be hurting our performance...
If no one has tried it I guess I can give it a go for a couple tanks and see, but my bike is so freakin loud that hearing a knock could be almost impossible...
I've been thinking about that same thing, Ralph, but I doubt I'd go as low as 85 octane for my first experiment, I'd probably try 87 first. Also, since my bike is a track-only machine, it's not easy to hear the engine over screaming exhaust at 10-14k rpm.
I'd be interested in hearing your results if you decide to experiment.
Alex
MRA #68
http://www.3dstickfight.com/racing/
Racing Performance Services, Racer Supply Co., Morse Racing Products
”Security is mostly a superstition. It does not exist in nature nor do the children of humankind as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure, or nothing."
-- Helen Keller
i put 85 in my 91 dr 350. works just fine. it just depends on what your bike manufacturer suggests....
Do you have any engine mods? Generally track-only bikes need better gas because of raised compression, etc... Street machines can probably get away with it. You're not running race gas?
I will probably just go straight to 85. It's not like I have a computer that needs to adjust or anything, and if it doesn't work out I can just dump it into my 4runner anyway...
I only run on 85. Haven't noticed anything funny yet. Of course, I've heard of people running <80 octane in the Rotax single in other countries successfully.
Not a shred of evidence exists in favor of the idea that life is serious.
Nope, no engine mods and running pump gas. I believe that my skills are the current limiting factor to my racing, not the power of my bike.
And, no offense, but I doubt a DR350 or Dysco's GS are making the 12.0:1 compression of my F4i, which is where my hesitancy to use 85 octane comes from.
Edit: From looking at Google, it appears the DR is making about 9.5:1 and the GS 10.3:1
Alex
MRA #68
http://www.3dstickfight.com/racing/
Racing Performance Services, Racer Supply Co., Morse Racing Products
”Security is mostly a superstition. It does not exist in nature nor do the children of humankind as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure, or nothing."
-- Helen Keller
Probably all true yakuza. 12:1? Wow that's high. My superhawk is 9.4:1 so I think I should be ok. I won't be racing this bike but would like a little more kick out of it, for no other reason than it would be entertaining. Some day I'll put a tank of race fuel in there for the "pour in 6-8hp gain" people are reporting, just to see what it's like.Or just go ride a TL.
My bike's probably the crappiest one here, so I would be more than willing to try it for a while and see. Just gotta fix the carb first.
Yeah it's not a good test if you leak all the gas out!
I'm almost through this tank so I'll be trying it soon...
When i had my 96 cbr 600f3 i always ran 85 and i had an after market yoshimura and dyno jet w/ k&n filter. I had no problems getting full performance out of that bike . 100 mph was a constant read on my speedo and never heard pinging or poping.
I've been running 85 octane for over 3000 miles on the busa with no problems. The mechanics at Fay Meyers recommended it because the 99's have very fine screens in the fuel pump and injectors that can get clogged with the additives in the higher grades.
I ran the mid grade in my Superhawk for about 7000 miles and it did just fine.
Well, after 3 tanks all I gotta say is .. wow! Hell it even wheelies easier (hoopty - I have witnesses!
I give it 4 out of 5 bananas.
TC, Ron, Chad, and a whole lotta pissed off soccer moms...Originally Posted by Hoopty
Suuuure Ralph, who is the witness?Hell it even wheelies easier (hoopty - I have witnesses!
Could just be I'm getting over my fear of looping it too and actually doing it right now, but it does have an extra "kick" with the 8five-o in there which definitely isn't hurting my cause.
It sure suprized meTC, Ron, Chad, and a whole lotta pissed off soccer moms...Suuuure Ralph, who is the witness?Hell it even wheelies easier (hoopty - I have witnesses!
Could just be I'm getting over my fear of looping it too and actually doing it right now, but it does have an extra "kick" with the 8five-o in there which definitely isn't hurting my cause.
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