Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Modified Ported Work or Race saws => Topic started by: EHP on October 21, 2014, 09:16:59 am
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Is no one porting saws any more ? I have always had alot of request to ports saws but I have had 23 request in the last 7 days just from the interent or phone calls and that is not counting the people from around here where I live . Sorry people I am just to busy with logging and trying my best to be around as much as I can to watch my 2 small boys go up and help with the 16 years old daughter , my plate is just way to full at this point in my life . I am playing thou whenever I get a few spare seconds on a new 562 and 365 , these will be my work saws for this winter
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I think everyone's plate is just too full. I've managed to port a couple this month but I've been busy with kart motors and soon I'll be working on snowblowers and snowmobiles.
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Don't have a clue except several others who do that kind of work are up to their hip pockets too .I don't fool with others saws so I wouldn't know .FWIW I'm not going to either .
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I also think the wood market has turned around and more guys are back to working in the bush.
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I think everyone's plate is just too full. I've managed to port a couple this month but I've been busy with kart motors and soon I'll be working on snowblowers and snowmobiles.
You port snow blowers? WOW!!! LOL
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maybe your correct but some strange emails and people wanting to become [friends] , once it quites raining which might be next year the way its been going we are going to see how the new 661 compares to the ported 365 and 562 , Pete has almost 100 tanks of fuel threw his 661
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I think everyone's plate is just too full. I've managed to port a couple this month but I've been busy with kart motors and soon I'll be working on snowblowers and snowmobiles.
You port snow blowers? WOW!!! LOL
Heck ya. I've even ported my weedeater.
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I did a MM on my mantis tiller runs much better, but too loud for the wife to use. Runs better but now I have to till her flower beds, not her. Contemplating buying a new stock muff for it. LOL!
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I have ported pole saws before , donot ask me why but one of the bigger tree companies wanted them done to cut faster
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I have ported pole saws before , donot ask me why but one of the bigger tree companies wanted them done to cut faster
I can understand why. Thats why I went to PS PS3 chains on my pole saw. Anything to help get through those cuts quicker while holding those extended bastards over your head. They get heavy fast.
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You could rework any engine I'd imagine .Why you would want to on a weedwacker I have no idea .Then on the other hand a wacker engne is often used on RC boats and the like .
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I have one ported Homelite weed whacker that is a model airplane engine. I has 1500 rpm over the unported one.
My actual weed whackers that I use on weeds are not modified.
But the engines in my two Echo whackers are certainly nicer to use compared with the 27cc Stihl whackers I have. Throttle response is so much nicer.
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I know this last post is old but just three days ago I used my cheapy Poulan pole saw .All Idid to that thing was remove the carb limiters .Simple as that sounds even those itty bitty engines run a darn sight better if they can get some fuel to them .
Ha I 've got 500 feet of driveway lined with limbs ,too damned wet to pick them up .I'm thinking about building an Ark. ;)
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Been a nice cool but wet spring summer so far. :-\
6 days rain 1 clear. Do it all over again. :o :D
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Al, we sure could use some of that rain before the whole province burns up.
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Well not to skew off the thread but you don't get much saw work done in the monsoons we are having .The mud is bad enough then you have mosquitoes by the droves on top of that .My little Ranger is stuck in my front yard at the moment .Then again I'll always know where it's at.
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I use to do alot of porting and head work with 2 smoker dirtbikes, my guess is the saw engines porting is similar, obviously the one piece jug applications make any machine work a different challenge, my question is does anyone out there have specs or is this something people just guess at until they get it right, and by that time have toasted a bunch of engines. Is anyone out there making expansion chambers? also i remember doing an air cooled cr500 honda years ago and it made the engine so punchy it was useless for any kind of general riding, don't want that type of result with any of my saws.
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There's a few people making pipes for them
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Adam knows of a few pipe programs to use for chainsaws. Maybe he will post them. I have long forgotten where and if they are already here.
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I have made tons of pipes for chainsaws , yes they are 2 stroke motors but that about it for being the same , chainsaw cannot get rid of the engine heat like a bike can so you have to factor in that when building the motor . Never tried trail and error but do have a computer program for building pipes , you still have to put in the port numbers that make sense and the degree of taper for the header , That is the big thing with building pipes , Bigger the degrees of taper the more air pulled threw the motor until you step over that fine line , some motors will take up to 6 degrees of taper , some willnot
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Bimotion, Mota work well. Been playing around with the inexpensive Pipe Wizard program and it seems to work good. Hotsaw racer friend in Australia made a few pipes from the Pipe wizard program and dynoed the different pipes. The bellow diameter and cone angles were changed but tuned length remained the same. The pipe with the shallower cone made the best power, so as Ed mentioned above, to steep a cone angle doesn't always work.
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again thats on a bike design motor , this is for chainsaw , crankcase is different and port degrees are different . Even type of fuel makes a big difference on how much horsepower each different pipe design makes or rpms , How you make your turn with the header also changes the rpms of the pipe , main reason is some pipe designs you make each cone of the header , some pipe design you make the header all at once in a long straight cone first then cut into cones , each cut with a thin blade is .025 so by the time you finish cutting 13 or so cones you have raised the powerband a 1000 rpms over what you set your goal at , Another thing , a pipe is or should be designed by the type of transfer ports in the motor , the smaller narrow ports like a small taper header better as a big taper will over draw what the small ports can feed , In a chainsaw most times its ported to pretty much max on port width and has a flatter port roof so most like the bigger taper and big dwell pipe , Alcohol is abit different than gas , most alcohol pipes are at 3.2 degrees , some are 3.4 degrees , bigger the degree taper the more fuel is needed and most alcohol saws are max out at 3.2 degrees if the ports are max out on size as well . My computer program is TSR which I donot believe you can buy any more , I think its the easiest to use as if you change 1 thing on the pipe the program changes the other cone angles to keep the pipe correct plus once you build your pipe it will print all the measurements to cut the pipe out of the metal type you are going to use , you even have to tell the program what thickness and pipe temp your using for the program to set the cone angles at . One thing thou , this program will always build you a pipe with a smaller degree header and dwell, you have to tell program that you want this degree of taper or this diameter of dwell
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Do we want to show different pipes in pics? I've only had a few.
partner 5000 3ci was Marcel Vincent pipe, hotsaws stihl is Dave Neiger, husky Cliff Helsel, dolmar Gille Levesque. 372 pipe Simon Bertrand I seen Simon selling and told Jim about, which is on Jim's saw he bought from me.
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to most seeing a pipe does nothing other than seeing a pipe , it doesnot help understand what the pipe was meant to do
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I do know about matching the porting etc. Just thought it would help them by seeing the different belly tapers etc.
Some I see people using out there on woods play saws make me wonder how well they actually work.