Chainsaw Jim
CJ Saws, LLC
I've read a lot about freeporting being a bad thing. I've also heard old school saw builders mention it like it's a big secret for hopping up saws.
I agree with that in that it would also reduce some spitback too. Probably on a smaller capacity crankcase such as a 440/460 hybrid it may help alilI'm wondering if the freeport can act as a vent to allow more mix into the case after modifications have been made.
Seems if u have a small crankcase capacity and alota intake duration that would cause some spitback, alil freeporting may help vent off the unneeded supply?I'll have to measure again to be sure, but my 372xpw was mistakenly freeported by about 1/8th inch. I thought I ruined it but I bolted it down anyways and it ended up running and cutting very well.
I was hoping someone would know the science behind what actually happens when freeporting occurs.
Probably not but I wonder if its any worse than it being spit back out into the air filter and housing? If needed and u have excessive spitback means extra fuel in the space that u have to cram it into? Alil bit of vent on the other end of the system instead of back through the carb may let the crankcase fill to its max potential per cycle? Just thoughts in my head and throwing ideas around onlyAtomized fuel spitting out the muffler instead of being burnt in the combustion chamber doesn't sound like a performance mod to me
PossibleProbably not but I wonder if its any worse than it being spit back out into the air filter and housing? If needed and u have excessive spitback means extra fuel in the space that u have to cram it into? Alil bit of vent on the other end of the system instead of back through the carb may let the crankcase fill to its max potential per cycle? Just thoughts in my head and throwing ideas around only
Thats my point. If its full it will push backwards but if the system had alil vent on the other end of the spectrum would it allow it to fill completely during the transferring also?Possible
But how I see it spit back occurs when your still dumping fuel into a full crankcase. Now you have a full crankcase you need to transfer all of the fuel into the combustion chamber. This cannot happen if some is goin out the exhaust.
Just my theory though
I smell what your steppin in now. Yeah that could be, but you still have to be able to burn all of it for it to do any goodThats my point. If its full it will pish backwards but if the system had alil vent on the other end of the spectrum would it allow it to fill completely during the transferring also?
Dont know for sure just thinkin but I know I built a saw that has .010 freeport and its a runnin son of a gun!!I smell what your steppin in now. Yeah that could be, but you still have to be able to burn all of it for it to do any good
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