|
|
Post by chrstnsnjr on Apr 22, 2007 22:06:16 GMT -5
Hey, what gas do you guys put in your Ruckus. A friend of mine (not a ruckus owner) suggested I use super unleaded. Is that a good idea?
Also, I just ordered some 49rr stickers from that guy on ebay. He lists the silver and black ones, but he does have some red and silver ones for black frames. If you buy the silver and black, just email him ASAP and let him know that you want the red and silver, he will do it. Thats what I did. Just an idea for anyone interested.
|
|
|
|
Post by Kami no Chiizu on Apr 22, 2007 22:47:06 GMT -5
Run 87 octane. Running high test has the potential to actually make your Ruckus run worse. Unless you install the big bore piston, there is no reason to run a higher octane.
Plus, it costs more.
|
|
|
|
Post by jedisabre7 on Apr 22, 2007 23:26:01 GMT -5
why is that?
|
|
|
|
Post by Kami no Chiizu on Apr 23, 2007 0:27:13 GMT -5
It's been covered on this forum, several times in the past... Basically, higher octanes are burn at a higher temperature. So your Ruckus might not be burning the gas easily. Thus the dip in performance. Higher compression engines, such as turbocharged engines, or even the Chanito Big Bore, need higher octane to prevent engine knocking. Which can be caused by the lower octanes, which burn at a lower temperature, getting hot really quick due to the higher compression, and exploding. Since a stock Ruckus doesn't need it, it's not built to burn the gas at the higher temperature. Or something like that. I'm sure someone'll correct me if I'm leading you off a cliff or something.  |
|
|
|
Post by I Heard A Rukus on Apr 23, 2007 0:27:35 GMT -5
Run 87 octane. Running high test has the potential to actually make your Ruckus run worse. Unless you install the big bore piston, there is no reason to run a higher octane. Plus, it costs more. He's right. I've run about 7 different types/blends/octanes through my bikes and with stock 87 is best. With a CDI or Big Bore 91 is MINIMUM!! KP |
|
|
|
Post by Dandy Dan on Apr 23, 2007 8:56:01 GMT -5
Yup KP knows ;D
The higher the octane the less potential energy is contained in the gasoline because you have less gas per gallon and more additives that don't burn like gas. Essentially, you want to run the lowest octane you can get away with so your engine has an easier time burning the fuel and so you can get the most energy out of it. High performance engines require high octane gas because the high compression ratio's etc require high octane gas to avoid early detonation but the high octane gas isn't the reason why these's cars a fast. Don't get suckered in to the mis-leading advertising by oil companies looking to make another buck.
|
|
|
|
Post by bigskybassguy on May 17, 2007 16:38:23 GMT -5
Our cheap gas here is 85.5 octane. I've not tried it yet. What are the signs in a Ruck that 85.5 isn't potent enough... pinging, like in a car? Or, not being able to exceed 25 mph?
|
|
|
|
Post by chanito on May 17, 2007 19:09:06 GMT -5
 Spotting pinging on a one cylinder engine is kind of tough, but it will make the engine overheat, so if the overheat lamp cames on and you can only ride very slow, you went to low on octane, but if my memory is still working right, the ruckus/metro motor is designed for 84 octane gas  So no lower than that 
|
|
|
|
Post by azbrandon on May 18, 2007 12:27:40 GMT -5
Our cheap gas here is 85.5 octane. I've not tried it yet. What are the signs in a Ruck that 85.5 isn't potent enough... pinging, like in a car? Or, not being able to exceed 25 mph? Engine knock and misfires. Bottom line is that the whole point is to have an appropriate octane for the peak cylinder pressure. High performance engines have very high compression ratios, thus the peak cylinder pressures are higher. I believe stock is 10.5:1 and the big bore is 12.5:1 for example, so the big bore's higher compression ratio results in higher cylinder pressures when given equal ignition timing. The other major factor in peak cylinder pressure is how much air goes into the engine. Obviously the more air that goes in there, the higher the peak cylinder pressure. This is why turbocharged & supercharged engines need high octane gas even if they have a 9:1 CR - the turbine is forcing in lots of extra air. I'm guessing you live somewhere at 4000 or 5000 feet elevation if they sell 85 octane gas at the pump. At 5000 feet elevation, there's only about 83% as much air in the atmosphere as at sea level. Here's a table to give you an idea of standard air density at various elevations: www.uigi.com/Atmos_pressure.htmlAs such, since there's only 83% as much air available, your peak cylinder pressure even at wide open throttle is going to be much less than if you were at sea level, thus you actually want the lower octane gas in order to maintain peak engine operation and fuel ignitability. |
|
|
|
Post by Dandy Dan on May 18, 2007 12:30:14 GMT -5
The stock compression ratio is 11.9:1 but yeah great write up! That's easy to read and understand and it makes a lot of sense. Thanks for sharing your knowledge |
|
|
|
Post by chanito on May 18, 2007 18:23:24 GMT -5
|
|
Nice info