Performance Parts?

[freakboy]

something that i think might work a bit in small engines is a piston like they use in some of the desil engines. they have a small cone in the center of the piston it looks like this a little bit but more rounded |\/\/| its to mix the air and the fuel better because it makes a vortex type thing and it mixes alot better.

On the thing about the carb farther away how does that increase tourqe?and if that is true if i make a intake that goes up to the top of my roll cage i will get holy holy amounts of tourque???

 

[mike75925]

the v would lower compression, i wonder if the increased mix would counteract it? spacing the carb has it's limits, generally, if more than a foot away, the suction will be decreased too much and not pull any fuel. i myself am not 100% on why, but someone told me that the length allows some of the fuel to bead up again thereby increasing the fuel intake, others have said it is because the fuel and air are allowed to mix more thoroughly.

 

[Rotore]

a split fire spark plug will boost performance but eventually it'll put a hole through the piston

 

[squat251]

if the fuel beads up it will not combust, it will burn fuel needs to combust otherwise your engine will not run, imagine trying to make a firecracker only to get a bottle rocket (its the same idea, but bottle rockets may or may not be better). that's why fuel injected cars need the injectors cleaned from time to time, or even replaced. carbs are designed to mix the fuel and air as thoroughly as possible, thats why it works, otherwise all our engines would run $hitty.

 

[squat251]

a split fire spark plug is a gimmick, it wont boost performance it will not do anything other than the job a single electrode plug will do. the only way i know to put a hole in the piston is if your running it too lean and it burns too hot. electricity works in the manner that it would only go to one electrode at a time period, and even if there was some magical physics defying plug you would get 2-4 weaker sparks, not the one strong one.

 

[mike75925]

thats why i gave the alternate, course it could be something entirely different

 

[Rotore]

a split fire spark plug is a gimmick, it wont boost performance it will not do anything other than the job a single electrode plug will do. the only way i know to put a hole in the piston is if your running it too lean and it burns too hot. electricity works in the manner that it would only go to one electrode at a time period, and even if there was some magical physics defying plug you would get 2-4 weaker sparks, not the one strong one.

lol thats just what ive heard

 

[mike75925]

most of the guys i heard from on pistons melt, only changed the plug, not jetting. ????????

 

[squat251]

then it was running lean the whole time, what kind of engines? perhaps someone forgot to put enough oil in the gas or what ever.

 

[mike75925]

dirtbikes, up in illinois

 

[freakboy]

the v would lower compression, i wonder if the increased mix would counteract it? spacing the carb has it's limits, generally, if more than a foot away, the suction will be decreased too much and not pull any fuel. i myself am not 100% on why, but someone told me that the length allows some of the fuel to bead up again thereby increasing the fuel intake, others have said it is because the fuel and air are allowed to mix more thoroughly.

its not a v its actualy a cone type thing in the middle of the piston and this way there can be very little space between the head and the piston cause all the air goes in there. i will have to find a picture of it to show you if i cant find one on google next time i got to his house he has one laying around i can get a few pics of. also small engines are bout flow not exactly compression.

 

[mike75925]

not neccessary, i have opened a few tractors engines. my ford 300 has similar pistons

 

[freakboy]

oh ok well its worth a shot i guess but i dont think anyone here has the machinery or time to make there own piston.

 

[squat251]

yeah, its a hard process even if you do the cast pistons (marginally easier than lath especially if you dont have a lathe) lots of metallurgy involved and other such sciences.

 

[mike75925]

yamaha had yics (yamaha's internal combustion swirl) other brands had other things though i have yet to check it out.

 

[freakboy]

one of these days im gona go crazy and desighn a full blown single cyl engine lol. full block and all and then attempt to make it. mabey grad project idk it would probaly blow.

 

[mike75925]

freakboy, two stroke or four? what kind of power/rpm?

 

[mike75925]

does the turbonator work? it causes the air/fuel to spin up before entering the combustion chamber.

 

[squat251]

might just get more air+fuel into the engine, so it would probably work on a large engine, but a lawnmower doesn't have much going for it in terms of these things working, its just too small of a system, you cant apply all the things from a car engine and assume they will work, and alot of the performance enhancing things are just gimmicks to make money.

 

[freakboy]

freakboy, two stroke or four? what kind of power/rpm?

probaly 4 stroke cause i would try to make the thing tourqy as hell with a huge piston.only problem is the cam i would need lots of help figuring that out.