Harv, thank you so much for being open and not being stingy on all the years of experience and sharing. We appreciate it. Just like you said, making a good saw on a budget. My ring compressor is a cut "soda" can with hose clamps,lol. It works just like the work you're doing. God Bless and again, we appreciate you.
Absolutely awesome build... I love making builds like this as well! Showing guys what they can do without moving upper transfers! You truly are the godfather of chainsaws!
@Jersey Joshua I have unsubcribed from the channel and deeply saddened by what has happened! Novice is a friend of mine.. and others that he still ows a saw to!
She runs very nice Ironhorse :) , Gotta admit i have never seen that done to a ring before but like usual your finished product does all the explaining needed for a keen ear ❤
Would love a side by side comparison video of the air filtration technology differences between stihl and husqvarna taught by the ironhorse. Show off what works and what doesn’t and why
Awesome Video , thats all I have to say about that ! You have forgotten more about engines then all the people on youtube will ever know, in my opinion ignorance is inherited not Taught. keep on doing what you do and forget the A holes Tj
Awesome build very simple that the kind of build I’m looking to try with out the ring mod, because I’ve never tried to port I appreciate your knowledge and experience you share with us, Thor what you do and sharing it with us!! Have Awesome Day and God Bless!!!!!
When I was tuning motorcycles they were mostly reed valve where intake timing wasn't as critical, the first disc valve engine I did highlighted the point you're making about port closure timing. I modified the disc by the same amount on opening and closing, can't remember the number but say 10 degrees, it ran shit, after a couple more discs I found a roughly 2 : 1 ratio between open and close, eg open 10⁰ earlier close 5⁰ later
Uncle harve in glad I dont know of the you tube drama, this is my happy place to escape, anen to everything you said from start to finish love ya brother. Keep on keeping on my friend
Love watching your builds iron horse gives me more confidence to try new things. Tried your piston trick to get intake to open sooner other than cutting cylinder
You know what, your a smart rascal. And I love your videos. The sip I just got was awesome. I got a cpl of 2 series that got little flip caps in the cover and my 55 has one in that plastic manifold. I close em for winter & open em when it's warm. And I've never had a problem no matter how cold it gets in Northern MI. Thanks again. Awesome info.
You're actually supposed to have them open in the winter. It allows the hot air from the cylinder to enter the airbox and help keep your carb from freezing up. That being said, I'm not sure that little flap really does anything on any saw that I've noticed.
Harvey, I’d be interested on taking pressure readings within the 372 cover. Could read pressures with a manometer. Before and after the cover modification. Might give insight into what’s going on inside. Imagine if the air injection was able to build a positive pressure. Would force debris from entering. I don’t believe that the air injection can move enough air for that though. Maybe at full throttle, the air box is under a larger vacuum. Maybe the air vents reduce the vacuum.
No it probably can't, except maybe briefly under deceleration off-throttle but it appears to be controversial and needs to be measured. My comment about how the system works isn't meant to imply there is actually any because I don't know but if there was it wouldn't be much
Long time listener first time poster. I built a learning work saw for my self about a year ago. I missed this video till now. But I guess by following your advice from previous videos. Built a clone 260. I worked the piston and tempered it, removed base gasket. All the port work was just expanding what was there with the transfers, exhaust, and intake; yep went a bit nutty but still stock #’s or a bit lower just more open. The intake was a bit on the long side as it was so I need to shorten it. It’s in the 160 as it is. It resonates a little bit of blow back in an rpm range so I get just a touch a spit back on a clean air filter. The saw picked up enough that it can run a 25” bar with stock drag hight and sharp chain in white oak. I have been beating on the saw hard at times asking it to do what you probably shouldn’t ask a 260 to do but it does it. I am either going to get a piston with a longer skirt or JB the floor of the intake up and take about 10 degrees out of it. I widened it to about .060 short on the sides of the skirt. I will update my comment once I shorten the intake timing I know the saw will gain when I do just don’t know how much. I am going for as much power as I can get in the stock rpm range. I will get the process figured out may brake an egg or two along the way on the cheap saws before I do my high dollar stuff. Thanks for your time and wisdom. Happy Thanksgiving.👍
3ed gen logger been cutting wood not as much as my dad did because I went in the service but I can tell you your right on with what your saying a good work saw needs to run strong not just wind out like a toy. I still love the 2100 my grandad gave to dad and I ran that saw for 2 years and it cut and bucked like no other saw I owned. even my 395 but I still love my 044,046, and my 066.
Great video 👍🏻 Could you put one ‘eye’ out the front and the other out the back with small direction tube. Have both directed at the handle for a warming / cooling function. Mind you front might clog quicker..
I've been building a 154 with this concept for the past couple of months, taking some time ordering parts from china and fabricating parts. Only widening the ports. Then i have a 2nd 154 where i'm going to go all in with and then see/feel the difference. I believe the ignition timing will be more of a difference then anything else over the widening of the ports.
You have inspired me to start porting my spair 046 what # should I have? I do have a new popup if needed. Or I will buy any thing if you have a formula that works.
my first saw build was very similar , it ran just that bit better, when i ported my weed wacker that thing had some zing but that wasnt hard because it had terrible castings, my 4 stroke mower ran so clean and it doubled the fuel economy but those old briggs mowers had terrible exhaust ports so it was obvious it was going to run better.
Is that piston beveled near were the transfers are? I'm starting to see that longer blow down in a big cut has more power or pull. If the weather would get better to test saws. I'm doing a MS 660 short blowdown vs long blowdown comparison. The short blowdown cylinder has 17 degrees of blowdown and long blowdown has 31.5 degrees. Be interesting can't wait to try it i'm almost sure the long blowdown cylinder will pull a long bar better in hard maple.
Just got my first Husqvarna, a 372xp. Haven't ran it yet and like to buy new bar and chain before I do..I hope I'm impressed with it after being used to cutting with the 60cc Echo Timberwolf. My 372 is supposed to have a mild woods port but idk honestly, does a modified muffler though. I'm looking forward to using it getting supised on the power of it. Have a good day Ironhorse
I like my porting just like that..very little is more in logging..I ll take two rings on mine..I d do a single ring piston..200 hours in logging hardwood rings are spent you know..I run pistons till they show cracks on the skirt..I got heated carb & handle on my 2172..it helps for sure👍👍😁😁
Great Content Harvey for my 372 Build. Mine has a heated Carb to prevent freezing. What about the Mufflermod for this Saw ? Will there be a Part 3 with Mufflerwork before the Saw gets in to the Wood? Thank you for all your Wisdom . Never heard experiences of Cold weather logging with these Sawissues you shared.
Tks you ironhorse, I grew up working on side off mtns with 289 to 410 guys running chainsaw . We work to get pay , not spend 30 min on U tube to get a little pay check . Sharpen chain the right way put a lot chainsaw to one side . Put cc to cc together ironhorse. I see it’s on u tube 60 cc with 79.9:cc hey there are not the same in cc to cc . In my case for a laugh old 61 husqvarna sharpen right might put a lot eyes open in 2023 . Another thing cutting a 16 “ or 22” if there are that big with 28” , 32” next thing be a 36” make me laugh my head off .
I’m building my 046 mag right now. Guys I was kind of sold oh running a single ring piston. But I want to stick with the ordinal cylinder, and I can not find a single ring piston that fits the 046. The 050 is a 52mm and a single ring. Will it work? Or should I run 2 and be done? Does it make that big of a difference??
I've been watching your videos for years and this might be the only time I have vehemently disagreed with you. I did the same exact mod on my 371 with 2 holes in the back of the cover. It was like 10 psi blowing on my hand out of the air box. That being said, the air injection absolutely pressurizes the air box and is designed to do so. If it wasn't, there would just be an opening into the air box, not a precision shaped tube that catches all the flow from the flywheel fins. I believe this is to retain positive pressure rather than vaccuum which also helps keep the fines out. Venting this pressure will be detrimental in the air box just like it was for me. I will gladly sent you pictures. Also, I have spoken to Nick about this as well in a constructive and very positive manner. I think it's a great product, but belongs in a spot that heat can escape from the cylinder. This should help with the egregious overheating issues with the 5 series saws. Thanks for sharing your knowledge as always. I've learned most of what i know from you and am honored to continue doing so.
I notice a lot of air coming out of the screens! Far more than I expected! I will test pressure in a closed unit! Is there actually enough pressure to increase performance? Or is it just flow with no pressure? Interesting! Let’s find out!
@@theironhorse6600 I don't think there's enough pressure to see a perfomance gain from forced induction, but I do see a great benefit to having the airbox slightly pressurized to not allow fines in after the large debris was removed by the flywheel.
This is interesting to me! I would think there would be a benefit to expelling the fines out of the screens! I believe that some testing is in order! Any thoughts?
@@theironhorse6600 I’ve tried those style frog skins / screens on my 572xp builds and have determined they do not contribute to enhanced performance and got rid of them … will they enhance performance on a 372 ? 🤷♂️
@@theironhorse6600 From what I've seen, an unmodified air box is most efficient at keeping fines out all together. I believe the screens will create a vaccuum and increase the fines and maybe force some out, sure. How much? I don't know. I'd definitely be interested to see you test the theory. To make me say the screens are an upgrade, there would have to be a performace increase because i'm almost certain it will decrease the effectiveness of the air injection.
Not sure If I understand what you were saying, if you don't like short blow down or early intake time? The strongest 372s I have ever had were super short blow down and 220 lbs of compression neighborhood. And very few people have cut as much timber as I have for a living. I guess there are different schools on everything and different ways to make it work...lol.
@@timberslasher4899 same here 31 years..still going strong..I like a stock 90ish cc myself..I ve had great running ported saws but don't really notice any difference in production..I usually cut & skid 5000bf per day solo..
@@timbarden4578 I cut 26 years by hand in Appalachia before getting my track cutter. Depending on conditions I usually cut between 50 and 100 thousand feet per week international scale. My record was cutting 137,000 feet in three and a half days. It was a ten acre tract and I cut the entire thing in that time. It was all huge white pine. I couldn't have done it in anything lesser even though I was in my 20s then...lol. Now ...when I say I cut this much all I did was cut and top, I always worked on high production crew so there was a person for every job. I normally didn't have to skid or anything, just cut.
@@timberslasher4899 land we log its not possible..not to mention track equipment is usless here..only select logging around here..most timber 30 inches on stump..but ground is nothing but steep ground..gotta pull cable to reach any timber..we dont ever cut pallet or pulp grade here.only high quality hardwoods..look up finger lakes N.Y...beautiful black walnuts here also..sounds like you've had a great career in logging its a very gratifying job
I've sent a couple texts to your cell phone the last 6 weeks or so without responses. Any updates on my Blue saw yet. I'm hoping it gets done before drag racing season rolls around and that occupies all your free time (which family time should) just don't want this to go into a 4 year build.
