jmillertime1148 Posted October 5, 2012 Author Report Share Posted October 5, 2012 At what psi would I need to look for a different fuel? Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted October 6, 2012 Report Share Posted October 6, 2012 Well it actually takes more than just kicking compression to figure out exacts what your fuel demands are. It basically involves measuring everything in your top end and using a mathmatical equation..... However that being said most people just stick by about 150-160 psi of kicking compression is the limit for pump fuels. Quote Link to comment Share on other sites More sharing options...
jmillertime1148 Posted October 6, 2012 Author Report Share Posted October 6, 2012 What kind of power gain should I expect when going from stock reeds and cages 22 cc domes and no timing advance and pump fuel and Changing to chariot cages and boyesen reeds ( thanks HJR ) 19cc domes advanced timing and av gas? Quote Link to comment Share on other sites More sharing options...
jmillertime1148 Posted October 7, 2012 Author Report Share Posted October 7, 2012 At this point with these mods do I need to consider having the stock crank trued and welded? I'm running DMC 916 exhaust and have k&n filter stock box no lid recently rebuilt the top end and am runnin 64.25mm pistons stock carbs. Quote Link to comment Share on other sites More sharing options...
Two Flags Posted October 24, 2012 Report Share Posted October 24, 2012 Can I use av gas in my shee? I'm going switch to 19cc domes in my cool head and advance the timing. Wanted some info and opinions before I run it. Thanks for any help. I doubt very many people on here would know to tell you that aviation fuel is not the same as 110 vp or any other. 110 is 110. in this situaion, Aviation fuel on the other hand, at least the last time i bought it from GE, mind you was five six years ago, is around 101 102. but I was leaded babY . there is lead in it at the same time with the intention of lubrication. The idea behind lead is as it passed through, it was a micro liqued bead that passed through, sealed then passed through as a bead again. hinse acting a pre mix for two stokes that was intended on running in four stroke. most of this fuel has or had added oxegen added to it. the idea was to run at a given altitude. Now you cannot fly a little prop job above a certain altitude so you dont see it sold as much as it used to be. BUT if you know what you are doin for sure as far as tuning, it has the potential to create the same as a higher octane, and not have to tune it as much if you were traviling around the country trying to drag race a shee. pavement or asphalt would be the most benifitial to this......... Quote Link to comment Share on other sites More sharing options...
Two Flags Posted October 24, 2012 Report Share Posted October 24, 2012 At this point with these mods do I need to consider having the stock crank trued and welded? I'm running DMC 916 exhaust and have k&n filter stock box no lid recently rebuilt the top end and am runnin 64.25mm pistons stock carbs. I have personally, in the last few years thrown around a( tube bell) type of carb setup where you should use model airplane fuel that is five to fifteen % oil, five to 25 % nitro methane and the rest is methanol. prob is the, how to make an air control inside of the tube!!! if not it has to be outer started, or pulled to to start it is a massive problem!! but withe the right porting, and the correct pistons, i think i can match any 421 drag without doing anything other than that!!!! Quote Link to comment Share on other sites More sharing options...
Two Flags Posted October 24, 2012 Report Share Posted October 24, 2012 Can I use av gas in my shee? I'm going switch to 19cc domes in my cool head and advance the timing. Wanted some info and opinions before I run it. Thanks for any help. I doubt very many people on here would know to tell you that aviation fuel is not the same as 110 vp or any other. 110 is 110. in this situaion, Aviation fuel on the other hand, at least the last time i bought it from GE, mind you was five six years ago, is around 101 102. but I was leaded babY . there is lead in it, at the same time with the intention of lubrication. The idea behind lead is as it passed through,is it was a micro liquid bead that passed through, sealed then passed through as a bead again. hinse acting a pre mix for two stokes that was intended on running in four stroke. most of this fuel has or had added oxegen added to it. the idea was to run at a given altitude. Now you cannot fly a little prop job above a certain altitude so you dont see it sold as much as it used to be. BUT if you know what you are doin for sure as far as tuning, it has the potential to create the same as a higher octane, and not have to tune it as much if you were traviling around the country trying to drag race a shee. pavement or asphalt would be the most benifitial to this......... if you dont understand how a multi dial jet works for people that they know,,,,,,, its the way of the future!!!!!! I cant wait to see someone use this idea on a matoon four case! sorry my spelling is bad. Quote Link to comment Share on other sites More sharing options...
Two Flags Posted October 24, 2012 Report Share Posted October 24, 2012 I doubt very many people on here would know to tell you that aviation fuel is not the same as 110 vp or any other. 110 is 110. in this situaion, Aviation fuel on the other hand, at least the last time i bought it from GE, mind you was five six years ago, is around 101 102. but I was leaded babY . there is lead in it at the same time with the intention of lubrication. The idea behind lead is as it passed through, it was a micro liqued bead that passed through, sealed then passed through as a bead again. hinse acting a pre mix for two stokes that was intended on running in four stroke. most of this fuel has or had added oxegen added to it. the idea was to run at a given altitude. Now you cannot fly a little prop job above a certain altitude so you dont see it sold as much as it used to be. BUT if you know what you are doin for sure as far as tuning, it has the potential to create the same as a higher octane, and not have to tune it as much if you were traviling around the country trying to drag race a shee. pavement or asphalt would be the most benifitial to this......... i forgot, compression means everything!! Quote Link to comment Share on other sites More sharing options...
jmillertime1148 Posted October 27, 2012 Author Report Share Posted October 27, 2012 I gather that it is safe to run and won't harm the motor which is great. I've got 165 psi and 5 deg timing advance. Would I get better performance from 110 over av gas? I also heard that some race fuels are dirty. Not sure how much truth is behind that just something that caught my ear. Thanks for all the info and opinions I have received so far they are very much appreciated. Quote Link to comment Share on other sites More sharing options...
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