extreem9 Posted July 6, 2007 Author Report Share Posted July 6, 2007 the way the octain thing is supposed to work is that the higher the octain rating the more resistant to detonation the fuel is. aka the harder it is to ignite, if your running to low of octain fuel in an engine that has either high compression which will compress the fuel more adding excess heat (like a diesel engine)making the fuel ignite prematurely or advanced timing which will cause the plugs to spark sooner that they normaly would causing the fuel to ignite sooner than you would like it to. both conditions will cause detonation or the act of your fuel burning before the optimum time it should. the answer is to run a fuel that is harder to ignite or that is not as flamable slowing down the initial ignition so the full burn will come on later to correct for these issues. when you use a lower octain fuel the higher compression will basicly pre heat the fuel making it easier to ignite which is why you need to run a higher octain fuel to compensate.. the downside to using higher octain fuels in engines that dont require there use is that since they are deigned to be harder to ignite your basicly retarding your timing. your not retarding your timing in the sense that if you do a +4 advance then use sub-octain fuel your back to 0 but rather that your slowing the burn on your fuel so it is firing later than it should with the correct octain fuel. if your bike was built to run on 100 octain fuel for optimum burn at whatever after tdc its set to fire then your causing your fuel to light after the fact if your running 110. think of it this way, it's a known fact that running low octain fuel in a banshee can cause detonation, how do you cure the problem? more octain to slow the burn. so why wouldnt it work the opposite way... imo yes you can hurt your preformance running too much octain but i still havent found the magic system that says " with this compression and this timing you should be running this octain fuel" it's pretty much as stated before, trial and error. the cheeper you get the more you start experimenting with lower octain mixes. i personaly use a 50/50 mix of 110 and 92 which in theory puts me at 101 but more like 99-100 in actuality. bike has +4 timing and 160 compression and runs great. 110 and 92 wouldn't that be mixing leaded with unleaded. That just sounds scary doesnt it? Quote Link to comment Share on other sites More sharing options...
ClimbAnyHill Posted July 6, 2007 Report Share Posted July 6, 2007 I think he's dead in the water, we'll see if he even shows up! Yeah he is, he'll be floating belly up :yelrotflmao: I forgot to say good luck man!!!!!! Quote Link to comment Share on other sites More sharing options...
DSSA Posted July 6, 2007 Report Share Posted July 6, 2007 Is it hurting any thing but runnin that 114 or am I losing any power? It's highly unlikely that you're hurting anything, but with 114 on your setup, I'd venture that you're not getting complete burn (IOW...losing a little bit of power). Quote Link to comment Share on other sites More sharing options...
extreem9 Posted July 6, 2007 Author Report Share Posted July 6, 2007 It's highly unlikely that you're hurting anything, but with 114 on your setup, I'd venture that you're not getting complete burn (IOW...losing a little bit of power). So I am thinkin that I may try doin a 101 unleaded with 114 leaded, anyone tried that yet. I mean mixing 50/50 leaded and unleaded? Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted July 6, 2007 Report Share Posted July 6, 2007 If you really want to run race gas that bad, just do 50/50 92 and 114. Quote Link to comment Share on other sites More sharing options...
swrbansheeboy Posted July 10, 2007 Report Share Posted July 10, 2007 110 and 92 wouldn't that be mixing leaded with unleaded. That just sounds scary doesnt it? not realy, leaded fuels were primarily used in older gas engines to soften the blow between the valves and seats in your engine. thats why you need to get hardened valve seats in any older engine to run unleaded fuel or the valves will knock. since 2 stroke motors dont have valves it doesnt realy matter if you run leaded or un-leaded fuel in them.... Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted July 11, 2007 Report Share Posted July 11, 2007 so, what happened? Quote Link to comment Share on other sites More sharing options...
shee4speed Posted July 11, 2007 Report Share Posted July 11, 2007 And the winner is???? Quote Link to comment Share on other sites More sharing options...
billybobby Posted July 11, 2007 Report Share Posted July 11, 2007 The only way you lose is if you break. I would say you win even with a really bad launch. I have ridden one of my buddy's and they are pretty sweet and by far the fastest 4X4. He has about a 200 yd paved driveway I rode it on they will wheelie with out pulling up or leaning back but that is from a slow roll or a stop. I'm not going to lie hell if was going to get a 4X that would be it. It is close to a 1,000 lb quad, they are not that fast. Your buddy is on his crack pipe when he is telling you he smoked those guys maybe for 50 feet. If you lose it was a choke on your part and you might have to retire as the guys who he beat should retire. Tear him up. Quote Link to comment Share on other sites More sharing options...
extreem9 Posted July 12, 2007 Author Report Share Posted July 12, 2007 I was goin to reply to this yesterday, but somtning was wrong with the server on the forum, I think. So I called his bi!@# as$ on Fri to ask when they were getting there and to see where they were camping. And he informs me that he has to work this whole weekend. F'in lame isnt it , I was soooooo pissed! So hopfully it will happen one of these weekends soon. He was probably just didnt want to lose his money! So I will keep you all posted on what the outcome is. Thank for all your replies! Quote Link to comment Share on other sites More sharing options...
RagunCajun Posted July 12, 2007 Report Share Posted July 12, 2007 He probably didnt want to lose his job. That's why he didnt go race. Quote Link to comment Share on other sites More sharing options...
MDS2106 Posted July 12, 2007 Report Share Posted July 12, 2007 (edited) At last years Clash of the Titans, the winner [a female] of the 4x4 drag race, ran a 5.04 in 300' on one of those modded 800s.If he has some money sunk into his bike don't get too cocky.Hate to see you lose $100.00 Edited July 12, 2007 by MDS2106 Quote Link to comment Share on other sites More sharing options...
MDS2106 Posted July 12, 2007 Report Share Posted July 12, 2007 Heres a vid of the 5.0 pass http://www.planetsand.com/forums/ubbthread...mp;Number=50878 Quote Link to comment Share on other sites More sharing options...
91banshee Posted July 12, 2007 Report Share Posted July 12, 2007 Ya I'm thinking the same as all of you he should get a good launch with that 4x4 but he has no paddles so we'll see! I will be sure to let you all know the out come, I may just take my video cam so you all can see it with your own eyes but I hate luggin that f'er around so we'll see. And as far as my compression, I am runnin about 165, 170 range and Im at 800 ft, but I will be runnin at sea level down in oregon at sand lake. Do you think I am runnin to high of octane? Would a little lower octane help? Im not sure of the timing it has an adjustable timing plate, but no degree markers. I figured Cascade probably set it up with a timming light when they built it, but who knows. Don Quote Link to comment Share on other sites More sharing options...
trail rider Posted July 13, 2007 Report Share Posted July 13, 2007 Heres a vid of the 5.0 pass http://www.planetsand.com/forums/ubbthread...mp;Number=50878 damn that was pretty cool. I bet she could have rode the bar the whole way if she went straight. and what was that other bike? the ds450? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.