mweba
Addicted to ArboristSite
Does your truck not have functioning headlights? I call foul!!
Jonsered 2153 VS Husqvarna 550XP
- Thread starter Mastermind
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Does your truck not have functioning headlights? I call foul!!
Officer's Match
Addicted to ArboristSite
No, I'm sure he's serious... 160psi. :msp_wink:
Son we got to have a talk about this night time videoing and testing. It's to easy. Do as I did. Buy a double halogen light stand for night time use. Makes it just like daytime. :msp_wink:
Halogen Work Light from Workforce | The Home Depot - Model 627-449
Halogen Work Light from Workforce | The Home Depot - Model 627-449
the westspartan
Addicted to ArboristSite
is there a reason to get the 550 over the 545 if the only difference is the transfer covers?
What is the price of the 545? Plus a can of metallic gray spray paint?!!!
What is the price of the 545? Plus a can of metallic gray spray paint?!!!
Hedgerow
HACK
545 has a larger combustion chamber.
Lower compression...
No cool xp on it...
Teeny weenie..
wigglesworth
Booned
From what I read, the combustion chamber is a bit bigger in the in the 545 as well as the transfer covers are smaller.
Believe it or not, im kinda curious how much Moob's can squeeeeeeze out of her. :tongue:
mweba
Addicted to ArboristSite
A long bar can fix a loose chamber.....just sayin
Excellent. Where did you end up with your port timing?
wigglesworth
Booned
Yea. I know a guy. But he works all the time and is SLOOOOOOOOOWWWWW!!!
And he gets distracted quite easily
Hedgerow
HACK
Psshhh... I wouldn't know...
Mastermind
Work Saw Specialist
Yeah.....and my neighbors will think I'm on meth. :msp_sneaky:
Ex: 107
Tr: 117
St: 75
In: 78.5
In typical Randy fashion, thanks for sharing. You know that I believe the same philosophy.
I'm guessing that you cut the squish band .050"-.060"? That would explain your intake port timing, which I think you mentioned you don't lower with porting on this series, and would also explain your nice compression number
I believe mine are at
Ex: 106
Tr: 115
In: 78
I don't know what the degree measurement is on the strato. I simply raised the cutout on the piston by the same amount that I lowered the intake. That seemed to help. At this point, I would not advise messing with the carb. But, a cave man would probably be better with carbs than I am
Mine's not wanting to come back to idle as fast as it should. I'm also having some mild throttle response issues. I'm hoping that it will learn it's way out of it.
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Mastermind
Work Saw Specialist
I'm guessing that you cut the squish band .050"-.060"? That would explain your intake port timing, which I think you mentioned you don't lower with porting on this series, and would also explain your nice compression number
I believe mine are at
Ex: 106
Tr: 115
In: 78
I don't know what the degree measurement is on the strato. I simply raised the cutout on the piston by the same amount that I lowered the intake. That seemed to help. At this point, I would not advise messing with the carb. But, a cave man would probably be better with carbs than I am
I don't know that the saw is any faster than it was with just a muffler mod. I can say that it feels much stronger and less peaky than it did. We'll see when I post a video tomorrow. I was at the end of the piece of poplar that was in the bench, and a friend showed up just as I was finishing this saw up. I'll have to go in the woods and haul out another chunk from the same log so we have a fair comparison.
Mastermind
Work Saw Specialist
I've been hesitant to do anything to the carbs on autotune engines. This one has a very small venturi but I think that helps it pull more fuel because the low pressure signal would be very high. I'm fairly sure the engine can get plenty of air via the stratos......that's the reason I won't alter the relationship between the intake and strato ports.
Mastermind
Work Saw Specialist
Well I just ran a tank though the 550xp.....damn that saw goes forever on a tank of fuel. 
I had a red oak (22" DBH) and a poplar (24" DBH) down and had blocked them both up down to about 14" or so. I used the 550 to finish them down to 2". It fired on the first pull this morning. Zero issues, it idles perfect, revs lightening fast, pulls the 3/8s 18" LGX like a much larger saw. I'll have to have some help getting a big chunk in the bench but later today after I finish working there will be video. :msp_smile:
I'm keeping this saw guys. It's light enough that me and my weak back can actually use it for more than a few minutes.
I had a red oak (22" DBH) and a poplar (24" DBH) down and had blocked them both up down to about 14" or so. I used the 550 to finish them down to 2". It fired on the first pull this morning. Zero issues, it idles perfect, revs lightening fast, pulls the 3/8s 18" LGX like a much larger saw. I'll have to have some help getting a big chunk in the bench but later today after I finish working there will be video. :msp_smile:
I'm keeping this saw guys. It's light enough that me and my weak back can actually use it for more than a few minutes.
Hedgerow
HACK
Tzed250
Addicted to ArboristSite
Randy, if I may ask, what was your stock squish, and what did you end up with?
Mastermind
Work Saw Specialist
I've got my notes right here John.
Stock:
Squish: .034 with a base gasket that was .026
Ex: 105
Tr: 115
St: 71.5
In: 75
After all mods:
Sq: .022 with a metal base gasket that is .008 (I may take that .008 from the squish band if more compression is needed)
Ex: 107
Tr: 117
St: 75
In: 78.5
(I also may raise the transfer and exhaust to factory specs......didn't want to go too high all at once)
I'm in the shop on the laptop and will try to run out and put another tank thru this saw during the day. I'm sure that it's getting stronger and stronger with each cut. These saws are nothing short of fantastic IMHO.
