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Old 04-26-2006 | 12:22 AM
  #36  
aaron9696024
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From: LaVerne, CA
Default RE: supercharger kit??does it work??

on a 2 stroke it sort of supercharges its self the piston comeing down decreasces the volume of the crank case pressurizing the contents and when the intake port is uncovered it comes rushing in and out the pipe and then the intake port gets closed up by the piston on the way up and right before it closes off the exhaust a pressure wave called the "blocking force" jams the extra fuel/air back in o and i forgot that when the exahust port is uncovered the exahust actually sucks the stuff throught due to the first cone shape of the exhaust then once the intake is closed and the gases get to the other cone of the exhaust it returns a pressure wave shoving the crap back in and the longer the exhaust the longer it takes for the gases to get back to the exhaust port so a longer exhaust is for low rpm power when a shorter exhaust is for high rpm top end power did u know u can slightly tune where ur motor hits its peak power just by sliding the exhaust forward or back in the exhaust coupeler but it wont be verry noticable so when u go supercharging this really u cant get more into the cilinder than it already does unless the pipe was designed to send back a stronger pressure wave but i dont know and as for the lean condidion thing yea it dosent makes scence to me to put a supercharger on top of the carburator then it is not gonna let as much fuel in because the boost from the supercharger is going to not want to let the fuel in so to solve this its better to put the supercharger after the carburator to maintain the proper fuel air ratio just like on most supercharged v8 motors the carb or carbs are on top of the supercharger and they can also be blown through without much trouble because they have a fuel pump and a needle and seat and a float bowl which is kept full by a valve controlled by floats and the jet basically the end is always submerged in gas and the supercharger or turbo system wouldent blow the gas out and when u give something more air u gotta richen it again beccaus if u dont it will be too lean and as for tractor buddie that would be a 2 stroke v12 detroit diesel a beast of a motor 98 cubic inches a cilinder i believe im not sure but my dad knows anyways this does not use the crank pressure type system to blow the fuel and air in it is supercharged and has a intake port in the side of the cilinder but the crank case is filled with oil and the air goes directly into the side of the cilinder and is blown in by the supercharger and it has a cam and exhaust valves so it can hold pressure so like yea im not sure if its direct injected into the combustion chamber right before top dead center like a modern desil or port injected but i dout carbruated but anyway the detroit works because the fuel air dosent go into the case which it cant because its a v and the area inside the v remains the same becaus when one piston is up the other is down so you will never see a 2 stroke v only inlines because the crank case can be seperated at the bearings and it can still do its crank pressure deal u might say o yea what about a rz500 nope its not a true v its 2 inline 2cilinder 250 motors arranged in a v no common crank and people talk about reed valves no they will make no difference with the turbo i think turbo banshees dont even use reeds, reeds on a motorcycle are simply so that when the crank pressurizing takes place it dosent just decide to go back out the carburator and anyways the way a rc crank is set up is sorta like a aprillia rotary valve which is out spanking the 125 road race hondas with reeds rotary valves are better more precice and dont flutter like reeds at high rpms and they seal better so dont even talk about reeds cuase with a turbo they reeds would always be open cuase they would have more pressure on the carb side cuase of the supercharger all they do is slam shut when they get the pressure from the crank case effect trying to escape out the carb wow i feel like a scientist here and im only 15 id like to hear what u guys think about my supercharging theories!!!!!!!!!