Jonsered Set-up

[eric_271]

Mange atleast in this thread I did not call it a new design, I said improved and the hp numbers speak for themselves as well as the championships that were being won with them because of the change. Jonsered was not the only one to make a jug and piston swap in that time frame. Makita/dolmar did it with the 520I . The 5200I was closed port but can be swapped to the 520I. On paper the 5200I had more hp.

 

[Mange]

I am not saying you or Sawtroll is wrong, I just point out the hard thing about the litteratour availeble, It is very different from dokument to dokument.

I was not trying to put words in your mouth, but I found it to sound wrong.
No big deal.

 

[Mange]

It was a sales trick more than anything, in my opinion.

 

[eric_271]

LOL I guess the trick worked cause they won some championships with it. Some of my information comes from a saw builder some from jonsereds brochures and some from saw collectors page. Who knows may be none of it is right but it makes for an interesting topic.

 

[Lawn Masters]

All I know is my 670 feels like its got as much power as my old 038, and that was rated at somewhere in the 5HP range. with muffler mods, my 670, is about a 5.3HP machine, its wicked, fast, and mighty powerful.

 

[brent denny]

FWIW, I bought a new in box 670 champ last year (possibly a 97 model year) and the owners manual says 4.9 hp. I know I will catch some flack for saying this but with a 20" bar it seemed to cut as well as my 372xp. I really liked the saw and wish I hadnt sold it. I do know of a dealer that still has 5 new ones. He wants $599 each though....

 

[eric_271]

The 670s were ahead of the game in the early 90s and to this day are right on the heels of the newest saws in that class. I tried a 630 super at the same time as the 670 and to be honest the power differance dident seem that much different. At the time bigger seemed better. I have read that with some mods it goes over the 5 hp mark pretty easy.

 

[eric_271]

Brent What was ya thinking? You should have kept it.

 

[brent denny]

 

[eric_271]

Im crying too cause I cant afford one of the new 670s you were talking about. Thats something, the price hasent changed in 12 years on a new 670. Im sure if enough people see your post he wont have 5 left very long.

 

[brent denny]

Hi, Mange. Is it possible when Jonsered says the 2156 has an improved filter system they are talking about the addition of the compensating carbeurator?

 

[Mange]

I was just grabbing a example that I thought was reasonable.

I really do not know what they mean, I just know for a fact if they don't have any real news on a model, but needed to change models due to worn up production tools, They tend to highlight a old thing just to have something to write on the ad's.

Like this with closed ports, nothing new, but new to this model perhaps, then elevated to the point where no one really can tell what is what, not even on factory.

I am not sure if this makes sense to anyone, but to me it is clear as mud.

 

[brent denny]

I see what you are saying Mange. I agree that there is now so much marketing hype that they make it difficult to distinguish simple variations of what is basically the same model.

 

[Mange]

That is what I mean. even if there is differance it will not be "headlines" so they highlight something else.

2051 is the first Jonny with turbo.

 

[SawTroll]

In my 92-93 Jonsered brochure all that is listed for the 630 is the 630 super II. Picture and specs. The 670 super was rated at 4.9 hp but in the years befor that was rated at less. Again the power gain in the early 90s came from the switch to the closed port. In the early 80s the 670 did not have as much hp. They were not winning championships in the 90s with the early 80s 670. Emissions probly did catch up with them in the late 90s probly 670 and the 630 both.

This is becoming more and more confusing
Coinsidense has it that I also have a 1992/93 Jonsered catalog. I took a close look at that and the info on CSCC last evening.

(1) You are right that the 630 at that time was called 630 Super II. I had forgotten about that.

(2) The 6xx series saws listed in that catalog is the 625 II at 2.8 kw (3.8 hp), 630 Super II at 2.9 kw (3.9 or 4.0 hp) and 670 Champ at 3.4 kw (4.6 or 4.7 hp). This is a step down in power from the 1980ies 625, 630 Super and 670 Super listed at CSCC.

(3) The first WC won with the 670 was in 1987, and then in 1989 and 1991.

 

[SawTroll]

Mange I think you are missing my point. By switching to the closed port the 670 gained hp. Im not saying every saw would improve by doing that but the 670 did and trust me the 670 champ was ahead of anything husky had at the time.

Maybe the open port 670 you are referring to was the non-super/non-champ 670, which was listed at 3.3 kw (4.5 hp)?

 

[SawTroll]

as well as the championships that were being won with them because of the change.

Winning the WC in 1987 was a bit early to fit in with your version of the story, wasn't it.

 

[SawTroll]

........ Who knows may be none of it is right but it makes for an interesting topic.

For once I agree 100% with you. :blob5:

 

[SawTroll]

The following was posted by eyolf in another "Jred tread", and I think it fits nice here in this tread too:

"[I]During the transition period, when the 6xx Jonsered saws were sold here in N. America, they were available with some of the same and some different cylinder/piston arrangements compared to Husqvarna. As you're surely aware, not all of Husky's cylinders came from the same place either. My old 670 had a Gilardoni assembly, but some didn't have the maker's name clearly visible. Some were from Mahle.

So far as I know, the J625 and H61 were 60cc, open, finger-ported saws. There was a H268 that was also open ported, at 67cc . J630 was closed ported 60cc, and there 3 or 4 part numbers for the cylinder assy over the years here. J670 and H266, H268XP were 67cc closed ported, and there were a bunch of part numbers, some of them the same, between Jred and Husky. during that time. Jonsered never sold a 70cc model to correspond with the H272, at least not here in N. Am.

I suppose each part number corresponds to changes in suppliers and design; someone out there probably knows the absolute best one to look for. I have a hard time telling the diff in perf. between my Jred 670 with a 272 cylinder assy on it and a 266xp; I doubt if could tell the best from the worst out in the woods at all."[/I]

I hope you forgive me for "kidnapping" your post, eyolf. :angel:

 

[Mange]

This is exactly what I mean, all the manufactuers bend the truth a bit, and use this semi false in the ad's. I think that sometimes the methods of measuring for ex, power is different and gives a semi false resoult.
This is probarbly not a general rule, but I think it could emply in some situations.
To be carrect the info must come from the designer, this is impossible in most cases.