Holzfforma G444! Blue Thunder! Made Stronger!! 

Well, I guessed 8.6hp in the other video so I was close. I built a farmertec 440. It is all stock. It is very healthy for what it is. I've told people and no one believes me. This dyno proves how good it is.

I didn't think a farmertec 440 could make 8.5hp great job! She's a ripper! That's some big power gains just for fun. Keep up the great work.

Nice job Joe, great details on the port work.

Looks good Joe! Nice to see content again. Great channel and learn a lot of port theory. Thanks!

Love seeing te port work. Helps give me ideas for my builds. Thank you for your time and effort.

Nice work! And, thanks for showing everything!

The modifications on the carburetor were pretty cool. Nice work Joe!

Awesome job Joe!

i really did not expect it to make that kind og power stock....nice work!!

Great work! I love to see what you come up with. Keep it coming….

Great to see you back

Awesome build brother 👏 I really like mine!!!

Great setup sir love it!!!!!!

I hope you are enjoying the build as much as we are watching. The cool thing about saws thay don't take up the whole shop like cars trucks or tractors do

Awesome work man!!

Joe you do so many cool things with saws that have been useful to so many people. Hope piggies are going good.

Phew Holly crap man that thing made power I def can't wait for u to port both my saws Def excited :)

Insane build!!

Glad to see you back Joe! Nice build on that clone.🤘

Awesome Build

Nicely done......

Good production. 👍

Welcome back buddy, hope to see more great content!

Let my ported 440 go last fall, gotta do what I gotta do to get the barn. The good thing is that I have a nice running 462. Nice work. Watching the video yesterday I thought it was a 660 clone and I thought it was a little short on power; knowing it's a 70cc saw makes a big difference in my opinion, it's an awesome runner. That was a wide squish band. Have a great day, enjoy the sunshine.

Welcome back joe the dyno vids sure have been missed, hope your doing well bud

Good Job Joe!

Thanks again for sharing!

You do awesome work 💪😁👍

This looks like a fun build

That's pretty impressive

Nice work, g'day from down under 😎

I would like to see an oil ratio dyno test on an autotune saw like the 550XP mk II. 50:1, 40:1 and 25 or 30. Another interesting one would be ceramic bearings. Love your videos and good to see you back.

Good explanation.

Love This Saw and The Mods 😊❤️😀 Excellent Job Subbed The Channel 😀👍🏼

Hello, nice work! I have been watching a dozen of your videos. I like what you do and how you do it. Subbed! BBR sent me here ;) Cheers

Back in the saddle again Mr. Dyno.

Nice build. It covered most of the tricks to get the power. Be nice sometime to go over carb mods for those who aren’t sure of them.

I have had a Holzfforma G372 for about four years and it has been a great saw. Quality can be hit or miss with these and the carb took some fiddling to get it right but for a bone-stock clone saw I’m very pleased with it. I appreciate your dyno videos. Can’t argue with the numbers. 👍

Ethan needs a tag in this video. "Joe come adjust your chain tensioner" 😂

Did good job on it . Looking at the cylinder. Should port them just clean cylinder up . That more like made that saw life last longer

Woke that booger up! Great job buddy! 👍👍👍👍🇺🇸🇺🇸🇺🇸🇺🇸🙏🙏🙏🙏

I’ve had a G444 for 3 years now haven’t found anything I couldn’t cut with it.

I would like to see a larger carbs effect. Great build! I think you should reconsider building these saws for people. There are a lot of people that like chainsaws that don't really use them(like me) . Just stipulate no warranty, if it blow up it blows up. Hobbyist only saws, not for real work. Shoot I live in Florida . Got a g372xp sitting on the shelf. Don't think there is a tree in the whole state I couldn't take down with my 46cc poulan.

Nice job Joe. Interesting choice of piston. I would be interested in seeing a dyno run using the Eagon filter without the stock cover and with a max flow cover, curious to see how much the tight fit affects it vs a max flow cover. I do like the idea of keeping the stock cover, esp. On a 044, 046 saw vs the max flow cover.

I keep hearing with those blue thunder saws put a oem stihl carb and clutch on them and they are good to go.

From my experience with logging since a child the newer saws now are more about high rpms and enertia and the older saws were more for torque and I always liked them better than these new ones I have a 327 Husqvarna and built it and it makes nine and a half horsepower I custom made a dome top Piston and shaved the head and ported the intake and exhaust and drimmeled the inside of the piston to have more space for air and fuel to fit under it

Nice job. I’m close to picking up a g395xp. It’ll be coming your way if I do. I wish I had 10% of your brain power in this area…. 👍🏻

Man… seeing that last jump I’d need to see that 395 or whatever model would mount slapped on her… with those beautiful fingers momma wants more fuel! LMFFAO! She’s a potential work horse of a saw right now and as she setting she definitely ain’t no slouch!!!! I just love your line here…”pretty, don’t make power!” As it surly does not…. That’s the perfect saw for a live green… crazy light day-glow bright as it can be green color… safety green with a orange stripe or two…😂😂😂😂!!! Man O man!!! Just getting to catch a couple of the videos from y’all’s little G/G you boys all broke it off over there in Ohio ? And there’s some badazz saw’s blasting wood that day…. Looks like some serious great times!!!! Super impressive… I don’t know who built that 036 that sounded a little drunk maybe???? I was just thinking about this build here on the methel-ethol would surely be one bad bitch!!!! Love your work and your channel… thanks for all your hard work and great videos, Sir! With my highest respect, DirtBoy Dave…. 😂😂😂😂😂🇺🇸💪🥩🔥❤️

super profesalny 👍👍👍

Excellent to start the day with a video like this.. what do you have to tell me about the durability of these saws?!

Nice silver quartzite Formica countertops

Try going from 19 thousandth to between 23 and 25 thousandths on your squish. With that much squish area and that small of a combustion chamber I’ll bet you’ll see more power with more squish clearance.

Dyno; excellent video. Question: for those of us without a CNC or lathe, what mods you did in this video could we get away with using other more common shop tools and controlled cutting with vises, clamps etc?

OH and for your viewers (and anyone NOT you, who may shy-away from Maxi's exclusively for financial reasons IE you already go through a half dozen filters you can't just swap all your units to Maxi's and continue at that rate!), there's "a trick" or technique, really, to prevent issues of FLOW/throughput (HD2's, as you've shown dyno joe, are only 2% more power than HD2's, one can surmise - I believe - that Maxis' superiority is a result of their longevity), IF you do subtle mods to your airbox-cover to allow more air-induction, and you "filter" (cheesecloth, fabric whatever anything THIN) these holes, like Frog Skinz only D.I.Y., you can achieve an airbox setup that's got more income-potential than the Maxi boxes have, and - at its center - has that 98%-as-good HD2 filter, no pre-filter necessary, and - provided you ensure you've got the high porosity foam-insert inside that filter, for catching oily carb-spitback, your HD2 will NOT rapidly fade, it can retain near-new potential WAYYYYY longer (like a Maxi, because Maxi's can take more dirt to the outside and, on the inside, don't give a hoot about a non-reed intake's inherent spitback...but you can simply address those 2 items in an HD2-based setup and voila you should be keeping your HD2 "98% of Maxi" power only no outta pocket $ and WAYYYYYY less-frequent filter cleanings, am still amazed how long my cleaning intervals became once I started over-sizing these "lightly filtered air-inlet" slots/squares I carve into the sides of my air-boxes!) DEFINITELY not a pro trick, or something you even wanna show-off to your sawyer buddies LOL, but hey sometimes efficiency & value are important IE residential tree care :P

Question, in your opinion, is it neccessary to machine the squish band to match the piston if you already have the desired combustion volume? Or is it all subjective?

Maybe should have just put a small indent on the piston where it came into contact with spark plug instead of just cutting the whole piston all the way around .. when I shaved the heads on my old 20 horsepower L head Briggs & Stratton I just put a small divot on the Pistons so it wouldn't have interference between the spark plug and the piston (bout .040")

Hi Joe, do you just grind the carbs as is or do you tape the jet orifices to prevent debris entering. Just curious if you grind it whole also with no teardown? I think you should do a carb mod vid!

Hi Joe, how is this 444 holding up? Any failures yet?

I have a question 🙋?? Have you used the dominant ceramic bearings.? Several years ago Kevin L. Built a xs440 hybrid and I wanted to try those bearings out and couldn’t find any info/opinions other than their website. I have run around 6/8 tanks thru the saw , it seems to run extremely “free” when compared to similar saw with oem bearings. Any thoughts opinions videos would love to hear.??

Very good video ! I Really like the 044s . I had and cut timber with 3 of them . Ran 32" and 34" bars on them. Fell my biggest Yellow Cedar with my Madsen Modified 044 with Pro Tek air filter with a velocity stack. 34" Sugi, full skip 75 CK , chisel ground. . Great saw ! Can you explain the difference in horsepower#s between the factory specs and your #s. ? Again, great vid !!! Also, did you weigh it before you added fuel and oil ?

Once you get to 10k subscribers you should raffle off this saw!

Great Video Joe! What fuel mix would you recommend in a stock G444? Thanks

Hi joe.

Let's do everything

Joe how did you know what to improve on this saw to get the jump in power? The numbers seem way different from what you’ve done in the past.

do u use normal burrs as in rotating file when porting theese chinese saws? I got told they are very hard to port because the plating usually flake off when u try to port it? how u solve this?

Hey brother need a rebuild kit for this G444, do you know where can I get one?

How much would you charge to do a brand new g 460?

At 13:50 that wrist pin snap ring is sus 👀👀🤔

What’s the big attraction to the full wrap handles ???? Next time you try cutting a stump low to the ground let me know how you like them haha

Excellent build Sir. What model Echo piston?

Would you ever take on an apprentice? I live near you

How similar is this compared to a ms440? I’m asking cause I’d like to get one of these saws and I keep hearing it’s a clone etc etc. but I guess my concern is, if I blow it up for whatever reason can I use Stihl parts to rebuild motor etc. just lookin for someone to tell me yes or no cause I wanna make sure I understand what I’m hearin. Great video btw

Whats with the super short bars? Somthing seems amiss here.

what echo piston is that?

Do you think the Holzff carb your unit had may have been sub-standard (by THEIR quality-levels, I mean)? I ask because I have a good proper walbro, and a cheapie Holzff, carbs on my 660's (ported, 1 is 56mm) and feel dumb saying this but don't think I can tell the difference (IE if someone swapped the carbs between my 54mm setup and the "hotter" 56mm setup, adn just tuned them to "like kind" idle/H/L settings, I doubt I'd notice!) Furthermore, I'd been (mis?)interpreting your works to mean/"prove" that the carbs ARE good for more-than-OEM, by a lot - your 590 frankensteins, wherein (on OPE forum) you say you don't even NEED to do the 620 carb/coil swaps for the 440'd-590 monster-machine (thanks, btw, thought I was done messing w/ saws & now KNOW I can't get that outta my head til I have it, or am convinced it's cheaper to just buy a 7310 & port that...but am doubting that's the case...I wonder if YOU would do "as-is"/all-work-final-sale for a used 590's crankcase, just tapping the cylinder-holes so I can put my own 440 top ends onto my 590? Currently I am "going to do it" and my best thought is "the JB Weld trick" for seating the jug but if I'm being honest I'm still very worried Re how well I can pull that off...I do use/love JB for intake floors, even if they didn't need reconstruction in the 1st place (cuz jb is far, far easier on intake-skirt's bottom!) but doing bolt-holes that you're gonna ratchet your 4 cylinder-bolts into, just picture myself wrenching-out the holes I'd made :P ) Thanks as always and Re the Holzff carbs I'd LOVE knowing your thoughts Re my earlier Q, whether you think your unit here was "a kinda crappy Holzff carb", OR if you suspect MOST of the G440/G660's are gonna see gains from "regular Holzff" carbs IE they're ALL that bad (OR am I misinterpreting the carb work- would you still be seeing 5%+ gains doing those same mods to the OEM Walbro carb?) Thanks again, keep pushing that envelope & letting us watch it is AWESOME!!!

What is the purpose of the finger ports?

RABBIT HMS Tibia

Wild Thing? Don’t get me wrong, I’m not a fan of the wild things. I just want to see what someone like you can do with it.

How come Stihl does not copyright this thing?

I'd love to have that saw.

Oh and drilled my muffler

do u break in the cylinder b4 u dyno it?

And vibration causes wear and failure

Good video and good job on the build can you get me the guys number who had the 592 pipe he phoned me but I forgot to get his number thanks joe keep er up bud and your saw in the wood

Man why would you relieve compression you need all the torque you can get in the cut

Chainsaws are scary and loud

I hate transfer goobers😢

Wow 😮 that stock top end looks like shit! No wonder the saws so cheap

I got a NEO-TEC.... ms381 clone and haven't touched it other then the muffler and it does well .

the roof of the transfers on the g660 I looked in are really jagged.

I'm lost. Where can I learn some of what and how your coming up with the info you have as far as certain pistons mean you can port a certain way? Very interesting but I'm absolutely in the dark. Great video!

Have you ever dyoned any saws from Phils saw shop in Florence OR?

what is the purpose of the finger ports @dynojoemods2764?

If only you would volume up yourself a little bit. For all of us who are watching it from our phones