HeadSmess
Well-Known Member
- Local time
- 11:29 PM
- Joined
- May 17, 2010
- Messages
- 3,048
its got nothing to do with catching excess fuel, its a "chamber" that holds the air fuel mix that otherwise would be spat back out the carby due to simple physics.
if the air is allowed back through the carb...it picks up excess fuel, then lurks around in the aircleaner. then, that already overly rich mix is sucked back through the carb AGAIN, and given another dose of fuel!
and whatever part of THAT air fuel mix doesnt make it into the engine...is spat back out, sucked back through... now it has FIVE times the required amount of fuel...
there may be small pockets of air in there that NEVER get into the engine at all, but simply bounce back and forth until theyre replaced with nothing much else but fuel...
thats half of the idea. keep the mixture consistent.
its all to do with the fact that air has momentum, mass, weight, inertia...once it starts moving, it doesnt want to stop. piston port has closed...air slams against piston, goes nowhere, creates a "blockage" in the manifold that prevents any more air getting in, or, the air is now trying to escape the pipe, and when the piston opens port again...all that air takes a while to start flowing back towards the piston, to the point it maynt ever even get down the port! stick a chamber next to piston...air slams into that instead, and on the intake cycle, is released. the chamber needs to be large enough to hold all this excess air...
there is a delay between the ends of a pipe, as a valve opens at one end. the piston opens port. excess pressure stored in bottle is there, ready to go, while air only just starts thinking about even wanting to enter that pipe...
talking about split seconds here, which is actually a fairly long time. to us, living in slo-mo, it seems instantaneous.
theres the other half of the boost bottle theory...it also smooths out the flow of air through the manifold, negating piston port effects. or, on the other hand..it ACCENTUATES the effect, and creates maximum power at one RPM at the expense of good running at any other RPM...
the same theory also limits piston engines to approximately 32,000rpm... even with a port opening directly to the atmosphere, there simply isnt enough time for the air to start flowing before the port is already closed again! air CANNOT flow faster than the speed of sound propagates through it!
i was looking at pneumatic firearms a while ago... hydrogen/helium are the WORST propellants, as they are so "light" that sound travels rather slowly through them, whereas...if you could safely handle Radon gas... being the densest of all gasses, sound travels the fastest. the projectile cant go faster than the gas expands, and its expansion rate is determined by the speed of sound through that gas. of course, the gas is normally compressed, which does raise its density and therefore the speed of sound through it.
as a naturally occcuring element, osmium, the heaviest metal of all, has the fastest propagation of sound waves. (anything heavier is a synthetic element)
this is a bit like hitting a nail with a hammer... the force is virtually instantly available at the point of the nail, yet... if the nail was a few miles long, there would be some delay between the hammer blow and the point penetrating the material as the compression wave travels the length of the nail... change nail to a pipe full of gas, and the delay between the ends will increase. remove the gas entirely, and there wont be anything at all!
reading something about neutron stars and black holes the other day...it mentions that at a certain diameter of neutron star, the density is so high that sound will theoretically travel FASTER than LIGHT. at this point its gone past the point of no return and becomes a black hole... at least i think thats what it implied...
wave physics. theres high pressure and low pressure waves bouncing around, densifying one part, rarefying another part...
co2/nos bulbs only work on lil pipsqueaks of about 5cc or so... but then ive never seen anything about using several linked up to one tube
worth a shot! especially if you get the nos bulbs instead hint... hospitality suppliers sell the small bulbs in bulk for a lot less than anywhere else! and there are two or three sizes available...
once again...everything relates to everything else in some way... an engine is very similar to a musical instrument. hence why my posts always ramble on a bit and touch on what seems like completely unrelated topics my apologies
if the air is allowed back through the carb...it picks up excess fuel, then lurks around in the aircleaner. then, that already overly rich mix is sucked back through the carb AGAIN, and given another dose of fuel!
and whatever part of THAT air fuel mix doesnt make it into the engine...is spat back out, sucked back through... now it has FIVE times the required amount of fuel...
there may be small pockets of air in there that NEVER get into the engine at all, but simply bounce back and forth until theyre replaced with nothing much else but fuel...
thats half of the idea. keep the mixture consistent.
its all to do with the fact that air has momentum, mass, weight, inertia...once it starts moving, it doesnt want to stop. piston port has closed...air slams against piston, goes nowhere, creates a "blockage" in the manifold that prevents any more air getting in, or, the air is now trying to escape the pipe, and when the piston opens port again...all that air takes a while to start flowing back towards the piston, to the point it maynt ever even get down the port! stick a chamber next to piston...air slams into that instead, and on the intake cycle, is released. the chamber needs to be large enough to hold all this excess air...
there is a delay between the ends of a pipe, as a valve opens at one end. the piston opens port. excess pressure stored in bottle is there, ready to go, while air only just starts thinking about even wanting to enter that pipe...
talking about split seconds here, which is actually a fairly long time. to us, living in slo-mo, it seems instantaneous.
theres the other half of the boost bottle theory...it also smooths out the flow of air through the manifold, negating piston port effects. or, on the other hand..it ACCENTUATES the effect, and creates maximum power at one RPM at the expense of good running at any other RPM...
the same theory also limits piston engines to approximately 32,000rpm... even with a port opening directly to the atmosphere, there simply isnt enough time for the air to start flowing before the port is already closed again! air CANNOT flow faster than the speed of sound propagates through it!
i was looking at pneumatic firearms a while ago... hydrogen/helium are the WORST propellants, as they are so "light" that sound travels rather slowly through them, whereas...if you could safely handle Radon gas... being the densest of all gasses, sound travels the fastest. the projectile cant go faster than the gas expands, and its expansion rate is determined by the speed of sound through that gas. of course, the gas is normally compressed, which does raise its density and therefore the speed of sound through it.
as a naturally occcuring element, osmium, the heaviest metal of all, has the fastest propagation of sound waves. (anything heavier is a synthetic element)
this is a bit like hitting a nail with a hammer... the force is virtually instantly available at the point of the nail, yet... if the nail was a few miles long, there would be some delay between the hammer blow and the point penetrating the material as the compression wave travels the length of the nail... change nail to a pipe full of gas, and the delay between the ends will increase. remove the gas entirely, and there wont be anything at all!
reading something about neutron stars and black holes the other day...it mentions that at a certain diameter of neutron star, the density is so high that sound will theoretically travel FASTER than LIGHT. at this point its gone past the point of no return and becomes a black hole... at least i think thats what it implied...
wave physics. theres high pressure and low pressure waves bouncing around, densifying one part, rarefying another part...
co2/nos bulbs only work on lil pipsqueaks of about 5cc or so... but then ive never seen anything about using several linked up to one tube
worth a shot! especially if you get the nos bulbs instead
hint... hospitality suppliers sell the small bulbs in bulk for a lot less than anywhere else! and there are two or three sizes available...once again...everything relates to everything else in some way... an engine is very similar to a musical instrument. hence why my posts always ramble on a bit and touch on what seems like completely unrelated topics
my apologies 
