Jonsered 2153 VS Husqvarna 550XP

[Officer's Match]

Some of that may of couse be a result of it being run some more, but nevertheless it gained a lot - and it still is far from run in!

What state is the 2153 in?

I'd rather know what state the 2253 is in.

 

[SawTroll]

I'd rather know what state the 2253 is in.

:hmm3grin2orange: Depends on where you are, I assume!

 

[SawTroll]

Need of more work!

I assumed so, just wondered how far the mods had developed on that one, when he said it was 2 secs slower.....

 

[SawTroll]

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.

Looks quite conservative, but it depends on how wide you got them - and I understand your caution!

 

[bryanr2]

Some of that may of couse be a result of it being run some more, but nevertheless it gained a lot - and it still is far from run in!

What state is the 2153 in?

Don't know about the saw but the owner is sitting here with his tail tucked between his legs.:hmm3grin2orange: It was good while it lasted though.:bang:

 

[blsnelling]

Looks quite conservative, but it depends on how wide you got them - and I understand your caution!

Good 346 numbers look very conservative too.

 

[Roll Tide]

Damn nice work Randy, as always.

 

[bryanr2]

Randy,
Interested in your thoughts on 550 vs 261 since you have ported both now.

 

[SawTroll]

Good 346 numbers look very conservative too.

Fine, but the numbers surely aren't telling the full story - the wideness (at which hight), and what is done inside the transfers obviously are important factors + of course the carb and muffler. :biggrin:

 

[Tzed250]

Thanks for the numbers Randy, I was busy. I asked because I thought I was loosing my mind when I measured my stock squish at .037. I ended pulling the base gasket and trueing the squish band with abrasive on a mandrel I made. My squish ended up at ~.020". I didn't get nutty with the ports. Mainly clean up, but I did try to put the exhaust and transfers back to original timing. I started it to make sure it ran and it sounds pissed off. Video shortly.

 

[Mastermind]

Looks quite conservative, but it depends on how wide you got them - and I understand your caution!

If I told you everything you would think I was lying. :msp_sneaky:

Don't know about the saw but the owner is sitting here with his tail tucked between his legs.:hmm3grin2orange: It was good while it lasted though.:bang:

No need to feel that way Bro. You 2153 may be the strongest one I've ever done.


I'm even more convinced after this build that the guys that design these things know exactly what they are doing....when we try to reinvent the wheel is when the saw gains nothing. Enhancing what is already present in the engine is the way to make a good saw into a great saw. In the case of this saw the designers gave us an excellent platform to work on......less can indeed sometimes be more.

 

[fastLeo151]

If I told you everything you would think I was lying. :msp_sneaky:



No need to feel that way Bro. You 2153 may be the strongest one I've ever done.


I'm even more convinced after this build that the guys that design these things know exactly what they are doing....when we try to reinvent the wheel is when the saw gains nothing. Enhancing what is already present in the engine is the way to make a good saw into a great saw. In the case of this saw the designers gave us an excellent platform to work on......less can indeed sometimes be more.

Is it just me or is it just as fast as that 372 you just built?

 

[Mastermind]

Is it just me or is it just as fast as that 372 you just built?

Good eye Andrew. I was wondering when someone would notice that. The saw you are referring to is a 362XP that has a 75cc XPW top end. It's totally stock at this point and also has new bearings and seals, new fuel line, impulse line, filter, new carb, intake boot........and yes this 550 is knocking down the same cut times.....with the same bar and chain in the same wood.

 

[SawTroll]

.....

I'm even more convinced after this build that the guys that design these things know exactly what they are doing....when we try to reinvent the wheel is when the saw gains nothing. Enhancing what is already present in the engine is the way to make a good saw into a great saw. In the case of this saw the designers gave us an excellent platform to work on......less can indeed sometimes be more.

The Husky engineers obviously do, and has done for some time....

 

[TK]

Well I was curious as to whether I wanted mine done or not. That question has been answered.

 

[procarbine2k1]

when we try to reinvent the wheel is when the saw gains nothing.

......less can indeed sometimes be more.

And your thoughts on this is why I think you are so succesful as a builder!

In the last 10 years, the performance of our saws has been so limited by the restrictions of the EPA, and now that manufacturers have taken such a large leap into the strato-world... the performance of new saws seems more limited by the lack of committment or ability to move forward by some manufacturers. Kudos to Husqvarna (and Stihl), their commitment to this new "green" technology is very evident in the last few years.

 

[SawTroll]

Good eye Andrew. I was wondering when someone would notice that. The saw you are referring to is a 362XP that has a 75cc XPW top end. It's totally stock at this point and also has new bearings and seals, new fuel line, impulse line, filter, new carb, intake boot........and yes this 550 is knocking down the same cut times.....with the same bar and chain in the same wood.

If so, I assume that could change if you geared up the 372 - same bar and chain, but individually best gearing is the way to compare different size saws in the same wood.

 

[procarbine2k1]

I am excited to get my hands on one. Any of the Central Ohio clan know of any dealers that have them in stock?

 

[wigglesworth]

YES! Why does no one listen to me when I say that?

I just can't believe randy doped y'all with that race chain and styrofoam like that, and yall fell for it.

 

[bryanr2]

I just can't believe randy doped y'all with that race chain and styrofoam like that, and yall fell for it.

Had to rep ya on that. bout spit my water on the computer.