Holzfforma G444! Blue Thunder! Made Stronger!!

welcome back everyone dino joe here today we got the hulls forma g444 this is the steel 440 clone i couldn't find any cheap decent 0-44 so i had to get the blue saw so we'll go over it tear it down port it up blend the piston swap it's going to run the eagan performance air filter and we'll just see how much power we can make out one of these let's get started all right here's the holes form on g444 see it says qc passed 71cc this is a steel 440 copy it comes with a dual port muffler spike three quarter wrap bar we'll get this filled up do some baseline dino runs then tear it down and build it up all right we'll get a powerhead weight full of fuel and oil 15 pounds 12.4 ounce there's symmetric [Music] all right we'll do a real quick teardown on this that's the filter set up the carb out of the way you can see a couple little goobers in there and the transfers plating looks okay squish band's a little rough intake's a little rough you can see some pretty decent honed scratch marks in there see the beveling leaves a little bit to be desired but that's what we're working with all right so i'm gonna do a piston swap on this one this is gonna be uh it's gonna be a little bit hotter woods ports for a get-together um you can see the piston on the right is what i'm swapping with this is an echo piston so we're going to try it out i've always wanted to try it the exhaust skirt is about 200 000 wider just shy of a quarter inch it's only a little bit taller does have a little bit dome the intake skirts are about the same width but the echo piston uses a single ring centered pin so that'll let me put finger ports and everything in this so i'll get it set up i'm going to cut the squish band at the angle of the echo piston open that up lower the jug and then we'll get some timing numbers on it normally people on the steels they'll flip the piston leave the exhaust narrow to run fingers with the stock piston so i found this piston i want to try it out [Music] there's the 40. check the squish rate at 19 000's at the outer edge so with the squish 19th owl i'll leave it there i did have to i did have to remove some of the dome on the piston you can see on this one i cut you can see on this i checked the squish in four spots with all that material out of the band i had to cut some off the dome i'll show you that too but i'll got it all timed out you can see i had to cut a little bit of the dome off still has the angle for on the outside edge when i first put it together the spark plug was hitting i probably could have used a shorter spark plug but i'd rather cut the dome off just to be safe with as small as that chamber is the compression should still be plenty high but the chamber cut matches the dome on the piston matches the angle i timed it out as it sits intake 70 exhaust 104 transfers at 120. so i'll get this laid out start doing some grinding on it all right so i'm just going to get the widths put in there but i want to show you a little bit up close you can see the pretty nasty uh hone marks in there lots of flash in the ports and everything pretty rough bevels this is the factory holes forma 444 cylinder so just your generic aftermarket stuff you can see a lot of here in the intake side you can see a lot of casting and flash and junk down there at the bottom of the intake port but it does have bevels it didn't snag a ring when i first fired it up that's why they're cheap that quality isn't there but it also goes to show that you don't need pretty to make power this cylinder on this saw first fired up put out really good power so i just want to show that up close i said that's what we're working with that's what we're starting with that's also why i don't port aftermarket cylinders for customers there's just too much stuff that can go wrong but being this is a get together being this is a personal thing this is what i had to work with in the short amount of time so we'll see if it even makes it all right here's a look at the layout these are just 65 port widths opening up the lowers to match the piston same thing with the intake take it to about 65 percent so i'll get this roughed in the exhaust will end up going wider because this the piston i swapped allows the exhaust will end up going a little bit wider yet because the piston allows for it now but the stock piston won't let you get much wider than 65 percent which that's pretty much maxed on the stock pistons for the seal so i'll get this roughed in i'll lay it out again all right here's the finished cylinder i just left everything in a burr finish good size finger ports widen the intake didn't really change the upper transfer timing much widen the exhaust raised it a little bit still has work saw numbers in it should be at about 100 118 120 about 78 on the intake i said don't bother polishing anything this will just be a fun get together type saw but not a bad finish for the burs just match the lowers to the piston so get this put together this echo piston uses thrust washers on the side of the wrist pin so you gotta put those back in i just smear a light layer of grease in there to hold the washers on slide it over put the pin in then you'll be good to go that keeps the washers from falling out you can normally start the one side through the pin like that so that's just a little tip you can see the windows are a little bit tighter than the steel piston and being closed off at the bottom i've always wanted to try this piston in one of these builds and i finally got a chance to do it so we'll see how it works out i had to shave a little bit of the dome off but you can still see it has the tape around the edge exhausted 98 transfers start to open at 120. so 80 98 118 120 all right here's the cylinder all cleaned up ready to go squish is 19 thousands the factory uppers are left alone i just cleaned them up a touch fingers 118 uppers 120 intake 80 exhaust 98 widen the exhaust line the lowers added the finger ports widen and lowered the intake and cut the squish band to match the angle on the piston so we'll see how that does i did have to trim the piston so i'll get this stuck down all right a bit out of practice to bear with me but we'll see if i can struggle through this got my ceiling on rain compressor a little bit of oil in there well hopefully this thing runs pretty decent that's the first time using that piston i happen to cut all that out of the chamber but i went with a slightly taller exhaust than i normally would to help relieve some of that compression all right you always got to make sure your oiler lines up right now i'm not even going to bother with the time in advance this is still just the stock 44 carb that comes on these kids they say if we need to maybe do some carb mods all right time for a muffler mod well my plan is a nice healthy muffler mod right here i'll probably use one of my wide deflectors and open it right up so i'll do that and i'll be back all right here's the muffler mod opened up nice and big under there knocked off all the flakes so get that put on fire it up that'll line up the front cover better once you lower your cylinder or do a gasket delete or any of that so put those lower bolts in and makes it a lot easier this is the filter setup from eps eagan performance sauce pre-oiled unifilter 3d printed cage so put this on don't put the cover on it's supposed to fit under here tight fit but it appears to fit get it fueled up see what it sounds like [Music] [Applause] [Music] all right that didn't go as planned so i got a couple other things i'm going to try and see if we can get some more power out of it if we go backwards that's no fun but we'll see so i'll show you what those runs look like real quick on the graph and we're going to tear back into it see that little bit of runtime no new marks pistons look good i'll get that pulled off all right i'm gonna take these bars out open those windows up to match then i'm gonna set the transfers at 116. all right here's the transfers i raised them and flattened them this time before they were just as cast they were staggered a little bit they started to open at 120 probably didn't finish opening until 124 125 so i set them at 116 flat they're slightly above the fingers i left the fingers alone then i ground out the braces in the piston so that should flow a little bit better and between that and the raised uppers hopefully it gets the power where i want it to be now this modified piston weighs the exact same as the stock one i took out so that's a good thing we always like a light piston so i'll get this slap back together all right got it all back together see if that made a difference [Music] [Music] all right i decided to go ahead and thin the shafts cut down the screw head open up the venturi a little bit so we'll see if that gets us there all right here it is with the modified carburetor all right here's the results bone stock the saw has actually put out some really good power 6.12 horsepower at 10 600 rpm next line up was the first round of porting with the stock filter you can see it gained a good bit down low and it just would not wind out up top that's because that cross in the piston still and the transfers and the stock air filter doesn't help at any at all so ported 6.72 horsepower at that same 10 600. the next one was round two moved the transfers added the air filter and we bumped it up to 7.56 horsepower and then the last one is after the carb mods so that type of gain with just the carb dodge really shows that this really wants more carburetor this is still just the kit carb i don't know if it's the zama copy or the wall borough copy i didn't take any measurements i just went in and ground it out real quick but it turned out pretty well runs really good makes a lot of power for a 44 size saw [Music] wow oh all right here it is still a little dirty from the get-together but there's the muffler mod these come with the dual port cover and the factory hole is pretty large i think that's part of the reason why they put out the power they do this has the eagan air filter on it you see the stock filter that comes with it once they're modified a little bit that stock filter seems to hurt the performance so the max flow or the foam filter really helps these out once they're modified now if you're just running a muffler mod maybe a gasket delete probably not a requirement but if you're trying to get the most out of them the foam filters really help these sauce breathe other than the ugly cylinder hone and the the nasty chunks and pieces inside the cylinder said i didn't look it over too well not really in a great spot to comment on longevity or reliability but i pulled it out of the box it fired right up put out good power tore it down modified it made more power i mean it might vibrate a little more than the regular steel the only thing i have noticed is the chain adjuster it's really rough really hard to turn but other than that it's not too bad of a saw like it's one of those things you get what you pay for but this was a personal build for fun something that i signed up for couldn't find a real low 44 in the price range i wanted to spend so i picked one of these up now that being said i won't be porting these four customers there's just too many things that can go wrong so i just wanted to get that out here if you want to pick it up play with one yourself you're definitely a great saw to learn on everything seems to work seems to function but i don't know if they're going to last as long or longer than stock just one of those things you have to take the gamble on it some of them are great some people have issues from day one but i will say overall i'm pretty pretty pleased with how it works how it runs how it feels

Channel: Dyno Joe Mods

Views: 50,861

Keywords: chainsaw dyno, donny walker chainsaw, dyno joe, dyno joe mods, g40, g444, holzfforma, holzfforma chainsaw, holzfforma g366, holzfforma g372xp, holzfforma g444, holzfforma g660, stihl ms 400, stihl ms 461, the saw, tinman's saws

Id: B_37ruzTyxI

Length: 21min 35sec (1295 seconds)

Published: Mon May 23 2022