Pt 2! Complete saw build! Exhaust and transfer timing!

[@customcutter100]

Wow that last tid bit of information was something. I've only ported one saw my 350, and I assumed that the top of the piston would clear the transfer at BDC. Well we all know what "assume" means. Thanks again.

[@shaner67]

Hahah, now I see what you mean.. We are all seeing the same thing and some of us haven't lived through the 60s.. Always something with technology, us tradesmen have trouble with this stuff.. Great video again Harvey

[@brianmoore3659]

Building a saw on acid wow!! Love it lol

[@theironhorse6600]

Haha! Camera thought we needed a filter! I didn’t do it! And they call them a smart phone! Yea right!

[@ernestdermis9349]

Lol

[@j.chrisbeck7492]

Thus is SO cool to see. My dad did some race porting on our bikes, but I was too young to comprehend some of the things he was working with....I will be following this very closely. If I can find a piston for the Montgomery Ward 4.0 saw I have, I really might attempt to port it and make it go....like a beast. Thanks Harvey !

[@customcutter100]

Exhaust opened at 100*, and the transfers were at 125*, so it's 25* of blow down. not the 15* that you mentioned in the video. Thanks for sharing your knowledge, excellent video series.

[@bikerdog5554]

Harvey what is hinkey mean? He he. Views,lighting and explanations excellent. Saw room now has a great feel to it. I soon realized I was intensely tuned and dialed into every moment. Thank you many times over . Boom Boom

[@Anthonywilkerson6963]

hey harv, watching pt 2 of the build and saw the part about the taper on the side of the piston i have only seen one other person do that in my 54yrs and he was doing it to the old school 2 stroke bikes back in the day, never thought i would see that again love it!!!

[@j.chrisbeck7492]

Yup, saw my Dad do this to our stroker bikes as well....gosh they would scream.

[@jefferyboring4410]

It’s common old chilton motorcycle repair manuals use to teach it . That way its reversible with a piston instead of more permanent on the cylinder like skirt cutting.

[@mikeyyoyo6464]

Man oh man there's a lot of serious preparation goes into this stuff it's precision engineering!!! Exceptional video, holy grail info, really interesting jaw jackin there big hinckey man 😂, Barbara snuck in & out like a pink ninja haha! Love it all 😬❤️👍

[@johndunbar2393]

Hey Mikey! Hope all is well in Scotland my friend! Take care brother!

[@timhart2652]

Yoyo are you going to try to make it to buckinstock this year

[@jimhurricane5831]

Thank you for this Ironhorse. I have learned so much from you over the course of your time on KZbin; more than I want to admitt😂 I greatly enjoy all your videos and thank you for taking your time a doing this!

[@davidinglett5361]

Thank you for taking time out of your day to provide us with this information

[@tazman-kennyfuller]

Oh man Harvey's gonna be bent about the camera action. I love it. So interesting to see the process and the explanations.🌲❤🌲

[@timhart2652]

Thanks for the video mr. Harvey the pretty detailed I like the stories that go with them and I was just watching Buck put new bushings in the birthday saw that you and bucking gave to him love the stores we all love you and I can't wait to send the Michigan saw to the New York Iron Horse part 3 coming up

[@jamesmcauslan1347]

Best porting videos by far 👍

[@bobpurs]

I’ll keep following, very informative Harvey, thanks again.

[@stevetheriault4164]

IRONHORSE YOUR WIFE IS AWESOME SEEMS LIKE AN EXCELLENT KIND PERSON

[@richr1870]

Loving the videos Harv! Thanks man!

[@jessies5632]

I never would have thought about tapering the piston that was genius

[@michaelcarrier8564]

Super great stuff. Also you are looking lots healthier good work. Keep it up.

[@johnclarke6647]

I have lots of those plastic containers but I use them for beef vegetable soup, a pot of which I make about once a month in the winter.

[@davidray4772]

Awesome job Harvey

[@evankibbe590]

Hi Barb . Great video Harvey. See ya next time. 😊😊😊😊👍👍👍👍👍👍👍

[@kingkevin160]

Oh man, loving this series!

[@CMLovejoy]

Great video! Thank you for sharing what you've learned.

[@johnclarke6647]

I just ordered a degree wheel, just like yours - the blue Motion Pro one. Now I can see why a certain saw does not behave, like all of my other saws. To make that adapter to screw on the crank all you need is a piece of aluminum round stock and a 8 by 1.0mm tap. Just drill through a piece of aluminum round stock with a pass drill and tap it out to 8 by 1.0 and screw it on and use a short 8 by 1.0 bolt to hold it on to the degree wheel. I think a 5/16 drill should work fine but I will need to check my drill card to be sure.

[@fabzacres-blackcat]

Hi Harvey ! One suggestion when checking squish ; put a pc of solder at 12, 9,6 and 3 o’clock (use grease to adhere to piston ; put the cylinder back on and torque , pull over ; remove cylinder and check each pc .... I’ve had cylinders that were off .003-008 out of square - casting/machining flaws .... if you measured .020 in only one quadrant and the other side was off .008 then you would only have .012 squish which wood exceed the mechanical limit

[@theironhorse6600]

Thank you so much for your input! However I am paranoid of dropping a piece of metal down the transfers! And will check all four quadrants if I see a variance! And you can’t average the numbers! Always pick your lowest number for your squish! That’s where your Piston will hit first! I hope this response don’t offend you but I try to eliminate anything going wrong! I’m old and set in my ways! Haha! I love seeing you in the comments so please forgive me if I have made an offense! I always want to see your take on the situation! Thanks man!

[@fabzacres-blackcat]

Ironhorse Chainsaw No problem at all Harvey ... doesn’t seem like the cylinders manufactured today (both oem and aftermarket) are made to the same tolerances that they were years ago ... out of square , out of round , tapered etc ... that’s why I’m not a big fan of “machining” the base on a mandrel .... I’m a machinist/ cutter grinder by trade and you wouldn’t believe how out of whack cylinders I’ve seen on some “others” builds - I agree you’re better off running a thinner gasket ... if you machine the base on a lathe using a mandrel and piston to cylinder wall clearance isn’t in spec you’re gonna have a very unhappy customer in short order

[@phogelbice]

@@fabzacres-blackcat How would using a mandrel to machine the base be a bad idea, what would be a better way and why. Im just interested, I machined 5-6 cylinders at work using a very tight mandrel, now I'm a repair guy not a real machinist so bear with me. ;)

[@fabzacres-blackcat]

Gürwald depends on skill of machinist and equipment used ... why not just use a thinner base gasket to get the squish or quench you desire ? Or none at all with sealer like Harvey does on this 390 build ? I will tell ya right now tighter squish (than stock)= More compression / more power but more HEAT and more stress on lower end - coupled with adv timing = FAR less longevity imho ; they also won’t rev as high .... are we building a logging / work Saw or a racer ?

[@Roninscobra]

Holy Frick I thought I was having a acid flashback

[@johnclarke6647]

I looked up the pass drill for an 8 b1.0mm and it is 17/64, which means a slightly loose 1/4 inch hole. I could file it a little bigger with a 13/64 chainsaw file which I have but I think 1/4 inch drill will do fine tapping aluminum round stock. If I was tapping out steel thin I might have to be a little closer in my dimension but not aluminum. I am going to tap the round stock all the way through, after drilling the pass through hole. Just chuck it up in a vise and drill it. I may drill from both ends to make sure my hole is as centered as possible. I will center punch both ends and center drill a small hole n each end and then drill it with my 1/4” drill half way through from one end and then drill the other end. That will ensure my hole is pretty well centered because freehand holes are not perfect. If I had a lathe I could center drill it pretty perfectly.

[@joshspoto6226]

Thank you for this content! It is fantastic and so informative

[@johnkennedy5655]

Love watching you work it's a pity you're not in this country as I have an old 61 that I would love to have a bit more torque

[@ericgrundeman6113]

Dammit I'm going down that dirt road BRAAAP!

[@bikerdog5554]

Iron horse I am watching these vids rigorously. Hi Ba rb. Boom

[@oldschoolmoto]

great info thanks harv your the man

[@pm270100]

good job well done

[@justinlogue31]

What type of sealer do you like/use instead of the base gasket? Thanks!

[@bigtexas7580]

Mr Harvey I live in Dallas,Tx and I have a 2001 Husqvarna 3120K cutoff saw with the muffler that has the round open port exhaust tip and I want to have this muffler ported. Either a bigger round tip like the ones you put on your saws or a 2nd round tip on the starter side. Are you able to do this for me if I ship the muffler to you? Thanks in advance.

[@ThePete1891]

So, if you do use the base gasket, do you still need to do this, or can you just bolt it together? Thank you sir.

[@justinlogue31]

Can you explain why 20 is the absolute minimum you want on squish? Thanks!

[@GreatLakesLogger]

To make enough clearance to accommodate crankshaft flex and heat expansion.

[@oposumcods1472]

If you're not using an IronHorse saw, you're just holding a boat anchor!!!

[@vtecpowersaw1577]

Hahaha

[@tjlovesrachel]

Oposum Cods never used one... but I’m down to try... I wanna see how it compares to my saw ported by hotsaws101

[@NMX777]

Harvey I had a crazy idea come to me and I thought you would be the guy to tell it to.... Is it a crazy idea to put a scavenging pump on the exhaust along with a rotary valve between the scavenging pump and the head... I don't know if that's how the two stroke Detroit diesels work or not I've never delved into them ( but I will ).....the only problem I see is you would have to have a cylinder head with the exhaust port coming out the side over the PTO end so that the pump could be driven off the crankshaft in conjunction with the rotary valve

[@NMX777]

I have another idea this one is much easier but I don't know if it would be effective or not if you put some type of small fins on the crank weights to create some type of a forced air flow around the crank to direct the air toward the transfer ports.

[@NMX777]

I guess it would probably be better just to utilize a turbocharger on the intake side..

[@GreatLakesLogger]

Just put a tuned pipe/expansion chamber on it. Does the same thing.

[@brianmoore3659]

Sweet!

[@briankleinkopf8557]

love the Barbara-Ninja...… (lol)

[@paulmorrey733]

Thanks

[@rickwarren7076]

Hey Harv, Thanks for the great vids you are putting out!! Noticed that 390 has a Mahle cylinder. How long has Husky been using them?

[@phogelbice]

my 70's saws got em

[@chrismadaj8751]

You need to get a chalkboard it might help just a thought GODSPEED

[@kevinparent8843]

i got 0.014'' squish on my hyway kit now.. what should i do.. if i add a gasket it will be around 0.032.. should i do a custom gasket or grinding the cylinder and adding a gasket ?, or leaving it with a gasket.. wanted to do a big port job on it !

[@theironhorse6600]

Make a 12 thousands gasket

[@kevinparent8843]

@@theironhorse6600 thanks for the reply, appreciate it. Did you experienced this thickness of gasket ? 0.01 or 1/64 gasket ? i expect that it will have difficulties to seal isnt it ?

[@kevinparent8843]

@@theironhorse6600 now at 0.021" . Thanks ! And btw, is it good to put a gasket and some motoseal to prevent leaking ?

[@theironhorse6600]

Very thin motoseal will end up 24-25 though squish

[@kevinparent8843]

@@theironhorse6600 allright harvey, many thanks

[@toast47624]

Wont cutting the top of the piston also change your transfer duration?

[@theironhorse6600]

Yes! That’s why I would do it!

[@toast47624]

@@theironhorse6600 Ok so as a rule of thumb are we looking for about 20 degrees of blow down to top of transfers? Is there a rule of thumb for intake timing?

[@ronsilva516]

A lot of info 🤓🤓🤓🤓🤓🤓

[@cowbyupnow1]

Im a sponge.....

[@NathanVdV]

your camera is failing. get a new one before it dies.