dolmar?

[Crofter]

Form Follows Function

I would find having a name so blatantly included in the form of an item a definite negative. I get a kick out of seeing company's logos in huge letters on peoples vehicle windows and plastered on their clothing. I can't think of anything much more distasteful and tawdry but I guess the marketing people think differently!

Frank

 

[RandD]

Originally posted by sedanman
... I have never seen a print or television ad for Dolmar.

Compared to the main competitor, DOLMAR is a small company with a lower budget for marketing. But I think, it's the same thing with PORSCHE and e.g. GM. A fine small company with powerfull products can compete very well against the huge companys.

It's Not the Big that Eat the Small...It's the Fast that Eat the Slow!

Originally posted by sedanman
... The PS500 looks a little like the battery operated toy chainsaws you can get in a toy store, this makes the job being taken seriously a bit tougher.

DOLMAR made a lot of tests with professionell loggers in Germany. They all were surprised about the perfekt handling an the impressive power output. Regaring the performance, they mentioned, that the PS-5000 is not only able to compete with the MS-260, even can compete with the MS-361 with 62 cc!

 

[Dolmar_Tech_Mgr]

Seems to me I have seen many Logos and Company names moving fast around a track every weekend in NASCAR. I not even a big NASCAR fan but i know the names of the sponsors of the cars that show up BIG and BOLD. I dont understand why anyone would not want their name on the product very prominently. Sounds to me like this saw is not even out yet and the name has already become connected to chainsaws. Marketing works.

 

[166]

Here's a picture of the Dolmar Cut-Off Saw (which was the first with the Big Dolmar Logo on the side)

This saw is the PS7900 in the world of Concrete & Steel. When a operator runs one of these saws, they throw their Stihls, Partners, & Huskys in the junk pile.

This saw has:
Very high power to Weight ratio
Excellent Air Filtration (5 Stage)
Excellent Comfort

Even with the big Dolmar name on the side, this saw is gaining market share all over the world.

So how can a Power Cut-Off Saw that looks like this sell as well as it is???

 

[Dolmar_Tech_Mgr]

Not only does it sell well, but was picked by Tools of the Trade Magazine as their top performance Power Cut over Stihl, Partner and the Multiquip. You know i dont remember them complaining about the brand name Logo being on the side of the, they concentrated their comments on results and performance. Novel Idea.

 

[Crofter]

Gotta agree with Mike on this one regarding one test being of dubious value in rating relative performance of production run saws. Too much temptation and opportunity to skew results.

Frank

 

[Sethro]

Thanx for the good words Paul. Its easy to soar like an eagle when your working with turkeys. Seth

 

[RandD]

Tests with serial products

Originally posted by Mike Maas
.... test done comparing stock untuned saws of a make other than Dolmar, to a factory Dolmar hotsaw? Anyway, if it is, I ain't impressed.

The test was done with serial products! Please check this website for additional infos regarding the outstanding performance of the DOLMAR PS-7900. This ligthweigth machine is able to compete with Stihl 066 and Husky 385.

The tested PS-5000 and the PS-7300 have the same DOLMAR High Perfomence Combustion like the PS-7900, the chainsaw with the best power to weight ratio (1 hp/kg!) worldwide.

 

[glens]

Re: Tests with serial products

Originally posted by RandD
... the DOLMAR PS-7900. This ligthweigth machine is able to compete with Stihl 066 and Husky 385.

...chainsaw with the best power to weight ratio (1 hp/kg!) worldwide.

I'm impressed by the 7900, which is certainly lighter than the 066, but on 24+ inch maple there is a marked difference in cutting capability in my experience.&nbsp; And the bit about power<font face="fixed">:</font>weight is a bit dubious since the stated power is on the model (not offered for sale) without "starting valve" and the stated weight is determined in a different manner than the other major players do.&nbsp; Stihl evidently removes the bar and chain only but leaves the rest of the saw in place when making their weight claims.&nbsp; Both Husky and Dolmar are removing other stuff too, but not the same (amount of) stuff when making their claims.&nbsp; If you go by the claimed power output and see how much <i>displacement</i> is required for a single horsepower, the MS460 packs the most punch by requiring the least.

The best and surest methods of comparison involve a bit more than the catalogs or data sheets alone can offer.

Glen

 

[RandD]

Re: Re: Tests with serial products

Originally posted by glens
... If you go by the claimed power output and see how much <i>displacement</i> is required for a single horsepower, the MS460 packs the most punch by requiring the least.
...
Glen

Sorry glen,

that's not correct. The MS460 is released in Germany with 4,4 kW (6,0 hp) (EWG-standard measurement). With a diplacement of 76,5 cc the MS460 reach a specific power output of 78,4 hp/litre.

The <B>PS-7900</B> is rated with 4,6 kW (6,3 hp). With the displacement of 78,6 cc the machine reaches a <B>specific power output of 80,2 hp/litre </B>.

But power is not everything. More important for the daily work is the torque curve. The measurement on the dyno shows the big advantage of the PS-7900. And it's easy to feel the difference between the PS-7900 and other chainsaws in the wood.

RandD

 

[glens]

I apologize.&nbsp; I'm only going by the specs available here in the US, which differ, evidently, from yours.&nbsp; The figures here are 78.98 hp/l for the 7900 and 78.82 hp/l for the 460.&nbsp; I see Dolmar has revised their online PDF manual.&nbsp; I don't have the old one available for comparison right now, but the figures have evidently changed for the advantage of the 7900 and they've altered the footnote to say "decompression" valve instead of "starting" valve.

Do you know exactly what it is they remove from the saw to achieve the 13.6 lb dry weight?&nbsp; We weighed one on a digital scale and got 14.4 lb and I believe removing the clutch cover was too much; taking it below 13.6 lb.

Do you have a ready reference to the EWG standards?

Let's get back to the "feel the difference in the wood" part of it.&nbsp; You specifically said the 7900 is able to compete with the 066.&nbsp; I'd like to know exactly what you mean by "compete with", if you don't mind.&nbsp; In my experience, as I've stated (and timed with a stopwatch), there is hardly a comparison in cutting ability.&nbsp; The 066 gets up and walks away from the 7900 in 24" maple.&nbsp; And that's really giving the 7900 the benefit of the doubt in this case since it had been internally improved over stock.

Glen

 

[glens]

I'd meant to attach an image...

 

[buckwheat]

ya know... i can handle having the name plastered on the side of the saw. its just a sign of the times and consistent with current marketing practices. i'm just glad dolmar has stopped labelling some saws as the "Happy Start."

i mean, if you're given the choice of labels to have on a saw that you hope to impress folks with, Happy Start would not be my first choice.

 

[bwalker]

I got a few questions. How does a decomp valve lessin HP if its not leaking? Does Dolmar make a plug for the decomp valve and if so whats the part#?

Glens, In referance to you 066 vs 7900 test. What sprocket did the 7900 have? Also who built the saw? Just because someone ported it doesnt mean it will be faster. I have laso noticed that the 7900 really likes a 8 pin better than a 7 pin sprocket in stock trim.

 

[sedanman]

Combustion chamber volume hence compression ratio hence horspower. Ben I'm surprised this had to be spelled out for you. In truth we are talking about fractions of 1 hp. You might not be able to measure the difference between 2 individual saws, but test a larger sample and you would see a trend.

 

[bwalker]

Combustion chamber volume hence compression ratio hence horspower.

But doesnt the valve sit flush with the head? How would this effect volume?
BTW I am well aware of compression ratios effect on HP.

 

[Saw Man]

Metric plug can be used in lieu of the D'Kom valve.
But not on my saws.
My arm, and brain is too smart for what my stomach..."feels"
If you want specs will provide.

Please note closely, the position of the D'Kom valve on the PS6400, 7300, and 7900 relative to the compression side of the stroke.

Any light bulbs turning on?

 

[sedanman]

Ben, The valve does not sit flush with the head. It's almost like putting another spark plug on the cylinder, it takes away from combustion chamber volume. Even the 'plug' to replace valve does not completely fill the void that was created to house the valve. On a lot of saws , 7900 included the valve is on the side of the cylinder very near the top. Removing the washer from your sparkplug would ever so slightly raise compression as long as the piston didn't hit it.

 

[Jacob J.]

The amount of volume lost by the decompression valve on Dolmar, Husky, Solo, Jonsered, and Poulan saws is negligible. The plug is desirable because all decompression valves will usually eventually fail.

In Stihl saws, the stem of the decompression valve can actually drop down into the cylinder and ruin the entire motor. In saws that have the valve on the side of the cylinder, it will eventually become an air leak, either by carboning up so badly that it can't close all the way, or by oxidation ruining the integrity of the valve body.

You can remove the crushable washer on your spark plug so it turns farther down into the cylinder, but any exposed plug threads in the combustion chamber will rapidly raise the temp. of the plug itself. In resistor type plugs, such as the WSR6F, this can lead to rapid failure.

 

[ehp]

as far as blocking the decom. valve on a 7900 , i would not do it cause from the guys here that i have sold stock 7900's to have broke the plastic hub in the rewind when not using the decom. valve,
as far as power the 7900 in my view is under rated cause they are very strong right out of the box and i have never had a slow one yet , Ben you are right on the gear , not sure why they come with a 7 pin on them any way cause they need a 8 pin just to hold the motor down
yes i am waiting to get my hands on a 5000 to see how they are going to work stock and ported, yes they are going to be a little different in looks but to me the more power and easier saw to run means more to me