This is one of my favorite channels!! Every day I watch you, Buckin, and Tinman. You guys make me want to port my saws!! I don't have the tools for it so, maybe someday. Are you taking customers for your work? I'd love to have an Ironhorse ported saw!
I really enjoy learning from the years of experience you share with us. I feel very confident in your numbers to build real raw power with dependably. Thanks again Harv
As a retired diesel mechanic I understand what you are trying to teach people. I remember in the late 60s and early 70s some of the young HOT RODDERS would stop by the shop and ask me to solve a problem. Which was always the basic. I would tell them you have to get it IN and then get it OUT!!!
Watched till the end again 🤣 what.. I always do love every minute of this Chit! Verble Nectar from the GODS I tell ya !😎🥺👊👍👍 Hope ya'll are well Harvey herp on keepin on!!
Laminar flow is "smooth" whereas turbulent flow is "rough". Layers of laminar flow don't mix and maintain their fuel:air ratio. Turbulent flow layers will swirl and have vortices and these rough conditions will allow mixing which can lead to pockets with high fuel:air ratios causing the fuel to fall out of suspension. Laminar is preferred as you said, however, laminar isn't rough, laminar is smooth. Fluid dynamics is more difficult than rocket science, and discussing it on video while fixing chainsaws is near impossible... So you're still the man, rock on brother, and thank you !
I appreciate your videos! I'm glad to see this type of content on YT finally I thought I might help to clarify though, in fluid dynamics, laminar flow is smooth. I believe you meant that you want turbulent flow at the boundry between your intake charge, and intake tract.
I enjoy your videos I have a 286 and it's tore down right now and I'm getting ready to put an extra 41 mm barrel and piston in it now so I'm going to build one of those exhaust deals that you got on there too that's awesome keep it up
He’s right about compression on two strokes. It effects power band difrent in 4 strokes. I’m old school dirt bike guy. Just now starting to learn on small engines im getting ready to tinker on a saw
Not that anyone was asking. Lol but I tend to listen to people that arnt full of crap. This guy seems to know 2 strokes. I am just curious if size matters going from 250 cc to smaller saw type stuff.
Awesome video Iron horse I thank you for sharing so much of your information and you techniques and your time I’m honored and excited got me on the edge of my seat with a smile from ear to ear that cylinder looks beautiful 😀 hope you and yours have a wonderful day.
@@theironhorse6600 that’s awesome news Harvey thank you I’m truly impressed by your work and your techniques master hands at work 🙂 the Iron horse I’ll be watching have a wonderful day
Mr Ironhorse, I want to say thank you, I over enjoyed your video, you have a gift, you put lives into Saws and we here in Europe have great respect for your talent. May I ask you please to build or modify one to the Company of Husqvarna in Sweden, I will be joyful to see you in Europe, just do it as you still have the power to do so. Visit the home of Husqvarna, and because of you Most of us has cultivated great interest on old great Saws. This will add to your legacy sir. Thanks to you, a father and a friend.
just found your channal through Tinman, love the videos, now i want to get another saw to try porting!! a cheppo that dosnt matter if it wreck it, as i kinda need the other two i have just now although one off them might blow up soon whewn i start milling with it haha.
I try an build my saws with as much blowdown I can give them that's why I cut my bases an move ex on most builds an big lowers I seem happy with how they preform for me
660 12 mm wrist in 880 wrist in 13 mm but 880 needle bearing rollers smaller allows 880 to fit 660 small end rod journal. So wrist 660 and 880 makes good combo hey.
In one of your videos you asked what saws I run, to start with I had an .076 Stihl and an MS290 that were stolen. I now have 2-MS290 Farmboss , 1- 440 Magnum and I have a 660 Magnum. Saws that were given to me that I am trying to fix 1-MS271 and a .029
Thanks Harvey great video I love the numbers I took notes. I will be building a notebook playing with porting some curbside weed eaters now before I go to saws to get my head wrapped around learning curve from 4cycle to 2 cycle. My 1st saw port I think will be a cheap Walmart black max saw I picked up.
So from what i understand as stroke increases and bore decreases you can raise your exhaust roof higher where as stroke increases and bore decreases you want a little bit lower exhaust roof. As rpms increase you want more blowdown. I wonder if you can have to much blowdown. Also carb, intake, case, and transfer flow are king. Case and transfer volume help as well. The trick for getting more case volume must be interesting... 🤔 It might be that trick you were gonna do on transfers by drilling a hole and running an airtube into a cartridge. I would think dimples such as those on a golf ball might help slightly with volume while still keeping the crankshaft close to case to help push air and also build laminar air keeping the fuel in suspension.
I am new to this so forgive me. Your opening sentence of “ as stroke increases and bore decreases you can raise your exhaust roof “. Your counter to that is your finishing of the statement, you want a little bit lower exhaust roof. Meaning it’s better to have the lowered exhaust roof. That being attained by decking?
Uncle Harv, you've spent years learning logging stuff. I'm here to learn what I can about chainsaws and I also learn about life too. You make my day when you post something and it's all good. Be safe as this too shall pass, one day at a time...
Yeah story time is fun, did you see the fire and excitement light up in his eyes about that p38 and all I absolutely love it, that's passion right there
Good morning Harvey. I have watched many of your videos and Buckin’s, Outdoors with the Morgans, guilty of treason and in the Woodward. I love watching them all. I have watched tests on all kinds of saws. One brand against another. One cc size against another, etc. my question is as follows: if you or the people in the business can take a stock saw and port it into a much better performer, why don’t the big manufacturers come out with a higher performance saw out of the box. I have seen people buy brand new saws and have them ported immediately. If for instance Husky or STIHL made a fully ported saw or a saw to the specs that you or others would operate at, wouldn’t that be a selling point to the pro logger? I am confused! Does a ported saw have less life expectancy than an out of the box saw just by the fact that some of the meat(or mass) is removed. I am hading for 81 and don’t do a heck of a lot of chainsaw work any more but I am still not afraid to get in a log pile and make some sawdust. I enjoy your channel. Thanks for many hours of enjoyment. Poppy
hi harvey, any thoughts on porting for hardwood? being in australia that is basically all i cut. do you think that running much shorter bars means the same porting would be ok? or would we be better off going lower on the exhaust roof to keep compression up? thanks.
So about the 272 vs 372 bore size, is there a disadvantage of using the 52mm kit on a 372? I've read people say it doesn't gain much because of extra piston weight and it doesn't make any more power, but you've used plenty of 52mm 372 kits so I'm curious. I've also used them but it future probably won't because there's no nice 52mm pistons available to me here
I've got a husky big bore cylinder on one of my 372 non xtorq that's ported and machined and can definitely tell it pulls more then my standard ported 372
laminar flow = smooth , Nonturbulent flow ..... which means smooth . .... you need laminar flow through the ports for maximum airflow . but you also need turbulent flow to vaporize gasoline and hold it in suspension .... turbulent flow is at odds to laminar flow pick your evil and live with the consequences
