Eddy_t

I'm keeping it as a strato saw

Had many a client ask me to look at a tree, for me to tell them it's an oak... 'Aren't oak trees protected? They're rare!' Nope, 20 out of the 30 trees in view are bloody oaks! A few have told me where plug sockets and extension leads are so I can plug a saw in! Everywhere I go has very fertile soil too, as the trees double in size over a few years! Another favourite is when I take down a 30+" tree and the owner wants everything down to 1" logs... But still wants the brash chipped... Until the tree is down and there's a mountain of logs!

Husky 560 and 18" b&c will take care of those pines! And you'll have finished, cleared up and had a brew in the same time as it would take to fell them with a Stihl

There you go matty, spud has spoken! I'd be more inclined to do that! It was one of my thoughts, but as I couldn't physically look at the cylinder, I couldn't see how damaged it was. Is that the cylinder you originally killed?

The ring crosses the top half of the port, not the lower portion.

That's the strato induction port, I shan't be touching mine, but it could, I don't know what increasing the strato duration would do to the saws running. Worth a shot maybe before forking out on a new cylinder.

560 time! Stock air intake, can't be raised much, as the ring stops about 1mm above when the gasket is removed, but it can be lowered and widened a little (but not too much or it will free-port from the impulse channel! Stock exhaust port, this can be widened! As I said, tiny! My thumb has almost blocked it, couldn't cover it all whilst trying to take a picture! Stock lower transfers, I'll blend these so it's smooth rather than a step. I spent ages trying to get the carb boot off, but it's actually rather easy once you figure it out, screwdriver behind the metal plate pops it off in one took longer than I'd like to admit!

Chipping and felling some willow poles

Right, my verdict is it spits some chip out! It's hard to say if it was worth it, maybe for racing, but the effort required when it'll be used for day-to-day cutting, I highly doubt!

I finished it an hour ago! The saw itself cuts like it's on speed, but it's ported and has a muffler like a colander to stop it burning pistons. My boss, who traditionally is against porting, wouldn't put the saw down!

Just clipped the heels on my 357 chain, not gonna do it on the 560! 357 is on 15" and took forever! Don't fancy doing an extra 3" of chain!

Very interesting wes, gonna have to use that when the 560 is done

560xp!

She's a beauty spud! What size pipe do you use on the muffler?

When do you lot shut shop for Christmas? I've snapped the muffler gasket!

It has been done already! The reason I'm porting now is the warranty is about to expire. The air flow draws the fuel out, it isn't sprayed out, the needles (or valves) restrict the flow of fuel to the jets. Increased air flow sucks more fuel out because it creates a higher negative pressure behind the jet and naturally the vacuum needs to be filled. Yes more power uses more fuel, but the carb controls this via a very simple set of rules: engine speed is too high (lean) -> add more fuel (richen mix) Engine speed too slow (rich) -> add less fuel (lean mix) That's how the autotune managed to keep saws with massive air leaks running for so long.

I will try, I'm not particularly good at remembering photos... As for polished, the Americans do it a lot, but I'm lazy and don't bother to get it to a mirror finish, just smooth it out.

There is no difference between lawful and legal, they have the same meaning!

You don't add more fuel, we actually lean the saws after porting, as the increased air flow draws more fuel out. The autotune will do this for me! The best way to demonstrate the Venturi effect is with an airline and a McDonald's coke, blast the airline at 90 degrees to the straw and coke will spray out, that's what happens in a carburettor, the high and low control how much fuel can leave the carb via the jets, but as the air pressure is drawing more out anyway, it usually needs leaning off.

I ask questions, when I get the answer I remember it when I don't get the answer, I keep asking until I find someone who answers. I have also spoken to you directly, iirc you gave me a very small can of coke at the APF. Chain speed is calculated by multiplying the rpm, chain size and sprocket together in a formula. In terms of peak power, it would be around 10k rpm, which would produce a result below 20m/s. But the 2 technicians at the APF spent a good amount of time chatting with me regarding porting, as did Gary. It was useful to have components available to look at prior to me doing the work (next week!) and hopefully it'll benefit the saw greatly (the crankcase overheats and warps the oil galleries on a 560, very common fault), if not, I'll be buying a new 560!

Yes, that because it's a stock saw with a pipe for a 3120xp! The power band is raised, but it doesn't increase the terminal engine speed, that's controlled by the carburettor. What it does increase is the speed in the kerf, but that's not relevant to PPE. If you leave the cutting attachments the same, there is no increase in terminal speed, as porting generally affects torque. With your comment about it being a black art, some things can be good, some can kill a saw's performance, it's trial and error. Luckily most things have been tried so we have a general idea of what will and won't work. I'll move on to chain speed and PPE now... PPE should be chose regarding terminal velocity, so <20m/s is class one. .325 chains generally run at 14k rpm on saws out of the box (346, 357, 550 and 560 all run a touch above 14k rpm) which puts a 7t .325 saw at 21m/s unloaded - that's class 2 PPE. Most people don't run at full chat when they ding themselves so class 1 is adequate. By increasing the rim size by 1 tooth on the rim you increase the speed by 3m/s (this puts the saws above the class 2 limit) meaning class 3 PPE is required, but this is unavailable (for obvious reasons). Most people who change the rims know and understand this, but still do it anyway (saws are getting more powerful so a lot of power is redundant unless larger sprockets are fitted). Vibration will not be increased as the rpm will not increase or decrease at idle and WOT, only in the kerf, where the wood absorbs a lot of the vibes. As the saw is running faster in the kerf, it actually decreases vibes (check husky vibe ratings at idle and WOT, you'll see what I mean). A faster saw does also increase production, in fact I can double the production compared to my colleagues just by chain speed alone! So the question could be, why don't the saws come out the factory like this? That also is an easy answer, you don't know who's buying the saw, either a pro, or a complete novice with a log burner, you have to comply with emissions regs! And finally, you don't make PPE good enough! Last I checked husky had stopped the technical 24's, leaving only Stihl's hi-flex 24's! Nobody makes 28's or 32's!

Yes, but it's large Stihl mount bars, they come in a set selection of sizes that have been that way since the 60's

So the options are large husky or monster Stihl bar mounts? The d033 mount is very limited, 17, 21, 30, 33 and massive bars! The d009 mounts would make more sense as standard!

I've had a problem similar this year with my horses, on the 20-odd acres of land the horses are on there are 4 (yes, four!) sycamores. We've had 2 horses poisoned by the keys. The disease itself is degenerative, and curable* if controlled quick enough. This can be done with Epsom salts and garlic powder in the feed of the horses. It's a typical knee-jerk reaction by horse-owners to have the trees in question felled, as 90% of trees are poisonous! Oak, willow and conifers are all toxic, just to name a few. *It will not cure the muscular dystrophy caused, but as your client will know, that's where their specialist training comes into practice. But if they do choose to have the trees removed, you may as well advise them to have all oak, willow, poplar, prunus, any other acer, laburnum, yew, conifer, ash, beech, and any other shrub/tree removed, along with all rye-grass, buttercups, clover and any other weeds. In fact, they may as well have the horse shot now to save time, as EVERYTHING a horse eats is poisonous to it! The problem with the sycamore is that it's been a good seed this year, the keys themselves are sweet (all maples produce high levels of sugar) so the horses enjoyed eating them, and the crop being much larger this year meant the horses could consume fatal levels

Even better if you slam a 375k engine on it! I managed to get one myself earlier this year wise! XPG too! Only downside is they never made outer dogs for it, and the stupid front-mounted tensioner!