Back to school with Ironhorse! why I don't sand/polish intake or transfers! a special unboxing!

[@stevenlaxton3618]

Thank you so much Ironhorse...I'm a young guy that's been wondering the science on this for a while and was always of the thought how can it be faster than smooth lol you've turned me from wanting to try a mirror port to wanting to try to a golfball dimple port lol....

[@davidhowald583]

thanks Harve, for sharing your knowledge, the stories of the past and your humor. i enjoy it very much.

[@vtecpowersaw1577]

Golf balls have dipples on them for a reason .makes them fly further than smooth. It creats a thin turbulent boundary layer of air . Im guessing thats the idear behind creating turbulence in the porting

[@theironhorse6600]

Exactly!

[@rncboy2]

Those dimples do affect fuel air mix. The size of each dimple and the space between them or if they are close together has a effect also on how the fuel atomiz's.

[@markatkinson9963]

Yeah,... didn't see this when I made my comment. The turbulence makes the air flow faster around the shape .

[@rncboy2]

Sorry for a late response. Yes it causes the fuel and air that's traveling directly straight threw the center of the port to speed up. So in making a port larger where the velocity slows down you can manipulate the speed with dimples, small ribs, with harvs roof ramps in ways of causing a turbulence that helps speed up the mix/air. The only reason one would leave it smooth is for low-end power but a chainsaw revs higher then a 350 ever thought about. Hope this helps a bit more as well.

[@chriscuts1201]

Great video Harvey. I always enjoy watching and learning, even though I'm not a saw builder. I'm just a saw operator. I've learned so much on how saws work from watching ur channel. Very grateful. Thank you harvey.

[@travisweldmaster7815]

It's the same principle as in a flat bottom skiff when theres just a ripple on the water you will go faster because of the minor turbulence makes bubbles making an air layer between the bottom of the boat and the hard( at speed) water leaving very little friction as opposed to slick day no ripples

[@schlomoshekelstein908]

condensation forms on teh glass and shit in my bathroom before my anus so that's good enough for me

[@Saw_Squatch]

Sorry I'm late to the party but this kind of content is exactly what I would like to see! In depth classroom like lessons like this are the next best thing to a full on apprenticeship and I really hope you crank out all the videos you've got ideas for!

[@jeffgrier8488]

Great video as always Harvey!

[@richardfuerst5286]

We rough up our intakes on our race snowmobiles. The dyno tells us it works. I own a set of STIHL Pro Mark chaps also. I love your informative videos, and the childhood stories. Keep up the great work!

[@travisweldmaster7815]

Whoever you are, pay attention, everything I've ever done that uncle harve has taught me has worked as intended and always leads you into learning something else in the process keep it up Harvey ur the man

[@ozdatman]

Laminar flow is why golf and hockey balls have dimples on them. They fly faster and further. Always look forward to your builds. Cheers from Tassie

[@theironhorse6600]

Thanks man! Yer right!

[@markatkinson9963]

Rough is smooth. Kinda' like the principal on a golf ball. The dimples sort of pushing air off the surface as there is flow.

[@joshuajohnson4396]

This guy in high-school had his 455 Oldsmobile engine's heads ported and mirror polished on both intake and exhaust. Lost 40hp from the intake but his exhaust ports stayed clean

[@jensenwilliam5434]

Thank you !!

[@treeassassin8833]

Hey ironhorse ur videos are absolutely awsome I'm learning alot from u I ported a 372 and it came out ok I could have took more material out but was nervous of going to far then helped my son with a husky 61 that I gave him what a ripper that is but I have a 298xp that I would live to have u build I know there tuff to get parts for and dont want to screw it up I live in new Hampshire so I definitely get into big trees I love my 395 but would love to see that 298 teach that 95 a thing or to lol

[@johnlincicum6390]

Hey Harvey, I've always wondered this...On a McCulloch 10 series like a Pro Mac 700 all the way down to the 10-10 there is a rubbery plastic insulator underneath the carburetor that's probably about 3/16". If you doubled that with 2 or more of those and a gasket between each "insulator" what would that do? On a Chevy small block V-8 or any car engine for that matter they say that long runner intakes make more torque and short runner intakes make more RPM and horsepower. Do you think that would be true on a 2 stroke chainsaw? I'm curious as to what you think.

[@lumberjacksons4468]

Thank you Harv and we are going to take one heck of a journey my friend with a lot of laughs bud.

[@ericgrundeman6113]

Look at cnc heads for cars they got the grooves going on for a reason 👏

[@elieregnier7783]

Good seeing you’re doing good Harv, i got a 372xp and i wanna do a muffler mod but i dont have a welder, what would you do to the stock muffler?

[@tazman-kennyfuller]

Thank you Harv. So much goin on buddy. Hey Cullen great to see you also friend. Hey buddy what Boyesen reed do you recommend for a stock P51 and also is it worth trying to find a dual stage reed for the P51 stock. Thanks buddy. Love ya🌲❤🌲✊🪓

[@marcduclos9789]

turbulent flow is fairly flat across the center section of a orifice. So when dose reads come into play or what happens to the turbulent flow once it hits the case?

[@donavonrobbins1908]

I can remember hot rod magazines over 25 years a go saying the same thing about not polishing your ports when matching the manifold to the heads.

[@travisweldmaster7815]

Question will aluminum make a better choice of material for saw muffler or ss? Al will suck the heat right out and kool with the block I'd think it would be th ed way to go instead of SS taking longer to heat up and staying that way longer? Keeping saw hot longer on one side instead of the same as rest of saw, aluminum

[@davidmccarlson9727]

Have you ever run or seen a homelite 520? If so we're they a good saw for the time I got one given to me thanks Dave

[@RumfordSledhead]

Did you ever have any experience with the old Jonsereds? Like the 70E or the 80/90, or the 910-920.

[@rncboy2]

Really need to pull the butterfly and shaft on each of the OEM carbs from 365 371 372..... so on to see the the actual different size of each carbs Venturi

[@jacobhein4319]

So i remember you porting a 60 cc strato saw that you were gonna run a 25 inch bar with skip tooth chain i believe. In the video you had the idea or theory of jb weld the strato port and then dumping the air down into the intake. So my question is this. Do you think dumping the strato air down into the crankcase would not mix with the fuel air and not lubricate the bottom end?

[@sekluded83]

@ironhorse how do you change squish on a ms390 and what are good numbers for porting

[@loganchase9252]

I really appreciate the effort you put into your videos! I’ve been trying to learn up so that there are some more young guys in the saw building game! Haven’t had the chance to make a KZbin yet, but I have been showing people my work on other platforms. I’d really like to chat with you sometime if you ever get the chance!

[@evankibbe590]

Cool beans 😊👍👍👍

[@jameswilson322]

Thanks harvy ,

[@kevinc.8869]

Hey Ironhorse, just wondering how do you fix that case?

[@JMB676]

Hey love the content, I build motorized bikes and I’m about to start 2 hybrids. One with a ms460 w/54mm bore and a ms660 w/56mm bore and I been watching for a while but I still use your info cause they are all super similar. Just wondering where your located at, I’m in jersey. Thanks for sharing.

[@gustavogartner3145]

👌👌👌

[@mikahakkinen5651]

great video

[@bmk506]

Harvey.....i just bought an 025 sthil off a guy....it fires up then stalls out. Any ideas ?

[@davefitzyam]

I love this argument it pops up all the time and maybe it's personal preference but I'm with you harv I love turbulence for Evan mix. Resistance is bad but turbulence is good just my view on it

[@shoresharp8349]

Hey Harvey I can remember as a kid going in a John Deere dealership in the late 80s and seeing John Deere Chainsaws. As a matter of fact I know my uncle has a pile of John Deere saws. I'm not sure if they are rebranded other saw??

[@kevinz763]

Echo built the john deere saws

[@johnlincicum6390]

Echo and later on Homelite and Efco.

[@andyjones6361]

Unboxing is like Christmas!

[@johnarnettsways.8758]

Thanks for the valuable information sr. Glad to see you doing better. Quick question about an old Mac 47 gear drive. I want to restore it. Should I put the factory bar and chain size on it or go different. As you know it is gear driven. Also have a strunk eager beaver. Will try to restore both. Any help or info would be appreciated. God bless

[@johnlincicum6390]

Those old gear drives can handle a pretty long bar. The hard part will be finding a different sprocket size to get down to a modern sized chain like .404. I'm guessing that's 1/2" chain or even bigger. You probably would have to modify a large mount Stihl bar D025 or large mount Husqvarna bar D009. You have to get the bar to oil good and slide enough in the adjuster slot forward and backward enough.

[@johnarnettsways.8758]

@@johnlincicum6390 yep 1/2”

[@pentecost66]

👍🏻

[@timbarden4578]

I will say the huskys got more flex built in them.thats an advantage for us cutters.I ve smashed both brands just the same..still got the 661c that skidder ran over..stihl parts just so expensive so its ridiculous.

[@takeashawnoutdoors5518]

I handed down a pair of stihl pro mark chaps to my youngster. They were good chaps

[@davidbulich1254]

Hey harv did some shoot bird shot at your shirt hanging on clothes line lol , all mine are like that too

[@davidbulich1254]

P.s love the information

[@andrewscott2866]

I do have a question, I will research it but I'd like to hear your take as well.... there are higher rpm saws and lower rpm saws. Are there limitations to modifying an inherently low rpm saw into a screamer? Are you handcuffed by the bore and stroke? I know you've mentioned piston weight as a factor with the big saws🤔 Thanks Harvey

[@theironhorse6600]

Mostly because of Piston weight! What the bearings will handle also!

[@ericmason8688]

Go travis. Older aluminum flats had pebbled surface which I belive had such an effect. Iron is working it for real eh?

[@Ketis1985]

Jonsered 2094/2095 and Husqvarna 394/395 shared piston, crankshaft, oil pump and clutch and thats about it. Cylinder and cases and other parts are different.

[@theironhorse6600]

I wasn’t sure! Thanks for the info!

[@G-PA-2795]

You can watch videos or read and the theory is unanimous. 2 or 4 stroke any platform. Any time you have fuel and air in suspension a textured finish is better than polished for induction side.

[@billdigs3130]

Is there a longer stroke crank that will fit in a 372xp

[@theironhorse6600]

Working on it! Nothing direct fit without machining!

[@dennisconstantine624]

Harv you looked like a kid opening his Christmas presents, you’ve got a great bunch of mates. Cheers from NZ

[@robertandreoli9764]

Harvey two videos one day stay safe

[@justinweaver8787]

Ima sthil homelite an mac an pioneer guy all day everyday but a 2100husky is on my bucket list.

[@shanegeorge7344]

Can I rebuild husky 562

[@treeassassin8833]

Hey ironhorse gotta question for u how do u tell a 10mm 044 over the other 044s

[@theironhorse6600]

10mm has a red kill switch instead of black!

[@billupstateny9151]

Be safe, Harvey.

[@kevinmaxam2414]

Great info Harv. Hope the area comes out of the flood ok. Be safe and be careful.

[@kcstott]

how about just a punch list of basic numbers to hit on various size saws.

[@fast4405]

Have you ever ran/modified a solo twin cylinder saw?

[@theironhorse6600]

I’d love to! Still haven’t found one yet!

[@johnlincicum6390]

@@theironhorse6600 I posted a question for you under the comments section Harvey.

[@jeremyfarlin9374]

Geezus give that kid something to do. Hes about to drool.

[@beeehusky7431]

Hey Iron horse I know this video is 7 months old and I hope you see my comment. I'm having issues with my 372 xtorq I switched over to xp. I just recently put a xp carb on it because the xtorq carb was not working at all. I just ran it again today and it over heated. I have replaced everything. Even the crank and bearings seals you name it. This has been happening since I got the saw runs great without the bar and chain but once I put a bar on it and make a couple cuts it over heats. This is not the first saw I have rebuilt but I am still very new at it. Any advice?

[@theironhorse6600]

Pull yer muffler and check the gasket! It could be sucking fresh air back un unstead of air/fuel from the muffler!

[@beeehusky7431]

I will do that thank you

[@beeehusky7431]

Also I have left my transfers and intake rough which is why I have been watching this video because I have been told leaving them rough is bad and I have to polish them. And here you are saying to leave them rough so thats what I'm gonna do I have been watching your videos for a while and really like how your saws run and that is my goal with my 372. Does the heat shield behind the muffler have to be there or can I leave it out because it is leaking for sure I can see the oil mess on the jug.

[@vtecpowersaw1577]

As well as keeping the fuel in atomized

[@lukeselectric]

Harvey, are you going to Buckin'stock next year?

[@theironhorse6600]

Sure am!

[@blainstenberg2806]

Smooth golf balls only go half as far as dimpled golf balls

[@jonbobskunkworks]

Harv dig into the boundary layer effect and the mold effect. Your welcome.

[@zacharygross460]

Do you know how to date a husky 266

[@theironhorse6600]

Maybe share a glass of high octane with her and she might go for it! All joking aside I’m not sure but I will find out and share the info!

[@stevengamsby5344]

My dad has a P 42 pioneer and it starts and runs great for about an hour and hour and a half after I’m done with about the fifth huge cottonwood tree it’s hard to start I haven’t told my father yet Sergeant Major Gamsby and I was hoping you could tell me where I might get a piston and cylinder because I think I ran it to lean not a mechanic my dad is but I am not let me know please he loves watching you all the time I just hope he doesn’t read this he uses my KZbin

[@rtdc5662]

Same reason a golf ball is dimpled.

[@carlreape1190]

Turtle!

[@yankdoodlediesel2574]

Harv how have y'all been ?!!

[@theironhorse6600]

Doin great! Email me yer phone number! [e-mail]

[@justinweaver8787]

How r u doin yank doodle hope baby yank is good an all is well.

[@yankdoodlediesel2574]

@@justinweaver8787 doing ok just trying to survive

[@justinweaver8787]

@@yankdoodlediesel2574 any way i help holler buddy. Stay safe an stay cool man its been hot.

[@yankdoodlediesel2574]

@@justinweaver8787 yes it has been hot ! Appreciate you

[@aldredske6197]

Hi Harvey and Cullen!!😀😀 I run the Stihl pro mark wrap chaps and have for over 20 years. I have yet to ever put a cut in any of my chaps over the years. People have to be really rough on their Stihl saws in order to break the back handles on them. I have ran Stihls most of my logging career and have never once broken a handle on one. I guess the biggest thing is not to get pinched. And if you do don't yank and pry on them. My old 044 that I had was the one with the red multifunction switch. That saw ran day in and day out for over 2 years without a problem. I think I might have put a couple new plugs in it but that was all. Best saw I ever owned. But then the 046 came out and I started cutting with them and then went to the ms460. Witch I still have 2 of them and they are my go to saws most of the time when I'm cutting firewood. Take care my friends!!😀😀 Logger Al

[@kcstott]

the same mistake is made on auto heads. the old port and polish. well leave the polish out just port and it will be fine.

[@andyjones6361]

Good idea losing weight is something North Americans struggle with.