Stock 7900 faster than stock 385XP!

[ehp]

Jokers there is lots of metal left in the transfer ports on a 7900 , I donot port that motor anything near a 372 motor , total different design of a motor , so i use a different porting numbers , that is why that ported 7900 has so much torque and Woodland likes the sound of the ported 7900 . I am going to build a 7900 alcohol saw for this year in the 0-5 cu pipe class and we will see how she stands up

 

[Gypo Logger]

These small get togethers and races are great and I think we should have more of them. It is a whole lot more fun to cut the bigger wood than the 10"- 12" stuff. The bigger wood really shows what a saw has got. Just as an analogy, a 346 will cut a broom handle as fast as an 088.
Anyway, here is a KD385 worksaw with a 9 pin in 17" Basswood using AM chain.
John

 

[Oregon_Rob]

Did anyone record stock verses the modified times on the 046, 385 & 066 saws? Interested in how the modifications reduced cut times. I am surprised the two smaller saws did so well against the sixty six.

 

[geofore]

PP7900's @ 100 hours

If there was a problem after 100 hours running the PP7900 I'd have been posting about it long ago. Face it Festus, Dolmar has a good saw in the 7900. PP'ed or not it is a good saw to have. I don't race mine but I do work it in wood, hardwood more so than pine and I've been telling all I love mine. The early failure is not what your asking, get to the point. You want to know how much tweaking you can get away with and how to do it yourself to get loads of Mo' Power? I take it you want it to spin at 16k-18k like thoses guys out in Montana do the 7900 and cut the life span to 12-18 months on the saw? They aren't passing out their secrets for free.

 

[jokers]

Well geofore, I`m glad that you know exactly what I`m after! LOL. The problem is that I didn`t yet realize that I want what you claim!

I never said that your saw would lunch after a hundred hours, but I have seen some cylinders that won`t get much past that. I`ve already explained why and for what it`s worth, I know how to raise the powerband.

All I asked was is it necessary to do that kind of mod to the 7900 to get the maximum out of it. You obviously don`t know and the guys who do know are being evassive at the very least. See geofore, I do know a few things about these engines and when I ask questions I don`t get any real answers, I just get a brush off or ignored for the most part.

I`m not asking anyone for their porting "secrets", but some generalized info about their experiences would be nice. So here`s how I see things and tell me if you are so different. When I ask someone who purports to be knowledgable in a certain area a question and I know that they have some experience, and they don`t answer me straight up, I figure that either they are lying or don`t really know the answer. It`s like pulling hen`s teeth to get any feedback at all.

This forum is quite frankly turning into a sawbuilders showcase rather than people sharing info. It all comes down to my saw is faster than yours `cause I said so. It`s really losing focus because we are all talking about working "woods saws" on the surface and then you find out that guys are trying to sneak race chains and funny fuels into these woodtick get togethers, and even go so far as to run saws not intended to worked everyday if you ask me. That`s precisely why I want to know how far the builders are taking them.

FWIW, I`ve probably said more times than you have that the 7900 is a great saw geofore, and I`ve never said it facetiously or tongue in cheek. I`ve also stated several times that I will buy one, but frankly after buying about 8 saws in the last year, it just hasn`t happened yet. Bully to you for needing a bigger saw and being savvy enough to buy a 7900.

I`m sorry that me wanting to know more about each builder`s perspective is upsetting to you. Well, not really.

What I will do is buy a saw or two from each of them and then I`ll know how they think. If I really like their product I`ll buy even more. So far I`ve got 3 Dennis g.`s, a KD, a Walkerized, a Dan Henry, my own modified saws in the shed, and an ehp on the way. I think that soon I will have a Dave Neiger and maybe even a Cliff Hessiel(sp?). Who knows who else I might even try. I`d have more Ken Dunns but I use more small saws and it was my understanding that he doesn`t like to port them. This BTW is my way of putting my money where my mouth is. I think more people ought to think about that.

Russ

 

[glens]

Dang, I just went to the get-together to meet as many of the AS folks as I could, and had absolutely no intention of even competing.  It was my overall impression that even the most competitive of the attendees considered it as much a mutual showcase and information swap-fest as anything.  The fact that there were even prizes awarded, I think, was just a happy coincidence.  It's too bad you weren't there, Russ, I really hoped you would be.

Hey geofore, did you see that guy from ZZ Top there?

There was a lot of "Here, you wanna run this?" going on and I got to use some really great saws and chain.&nbsp; Of those saws I'd actually consider owning (well, ones <i>like</i> them at least) I don't know if I was more impressed with the PP346 or the stock 7900; both of them blew me right away.

The way I recall it, the topical 7900 had previously consumed 1 tank of fuel and the 385 was virginal.&nbsp; I don't have a clue about carburetor adjustment differences, but they both sounded right to me.&nbsp; The wood really was more suitable to 50cc saws, though.

Glen

 

[jokers]

Hey Glen,

I wish that I had been there but it was my turn to work the holiday weekend. I`m still planning to have a get together at my place but it is more likely to be later than earlier, as In August. Maybe right around the time that the Woodsman`s Field Days are running at Boonville. As the schedule stands now, I`m off then.

I`m mighty impressed that you made it all the way form Choleradew. Was there a farthest travelled award?

BTW, I`m sure that the weekend was a great experience. the people here, including those that I quibble with a times, are the best, in my book.

Those little 346s tune up nicely, don`t they. The 7900 has got to have the Husky and Stihl engineers losing sleep, I hope that they answer the challenge.

Russ

 

[glens]

(I thought you knew that) I'm currently a Hoosier.&nbsp; Jeff Sikkema might have had about 10 miles on me, but they didn't quibble over that and found prizes for both of us; I took the shirt and he got a knapsack.&nbsp; If I'd have planned a little I might could have worked something out besides driving solo.&nbsp; I guess it comes back to me not having any friends...

You gonna have them speakers built in time?

Glen

 

[rahtreelimbs]

I was one of several who participated in the 7900 vs. 385 showdown. I believe my time was .04 seconds faster with the 7900. The wood we were using was Yellow Poplar about 15 to 18 in. in diameter. I am in no way a saw racer, although I believe my cuts were pretty consistant as far as saw control goes. The 385 felt big and cumbersome compared to the 7900.


This who is the fastest is really only part of the equation, if you are strictly racing then speed in the cut is the thing. From where I sit and need I look at the speed, torque, weight and overall feel of the saw. IMO the 7900 has the advantage.

 

[geofore]

Mo' Power

Maybe I just fell off the truck yesterday and 35+ years I spent playing with chainsaws and trees don't mean squat because I don't race saws. You need to stay focused and on point. Now that you have explained what your after you may find some are more willing to talk to you. You're not going to win me over telling me my saw will crap out after 100 hours because it's ported when I have more than 100 hours on it. If you ask do you think hogging out the innards to the point of early failure is a bad thing I'll tell you it is when it isn't needed to enhance performance. You might be looking the wrong direction if you need to use a different ignition system to get the rpms you want and you're hogging innards instead.
Lighten up a little, the new guys like reading about the power porting cause it's new to a lot of them and it is fun own one. Not everyone's owned ported saws for years. I don't expect anyone to believe one saw is faster than another saw just because someone says so but after you see it you ought to ask for help getting your foot out of your mouth. Then again it could have been operator error like engaging your foot before shutting your mouth, the whole thing is forgotten.

Yeah, I saw that guy with the ZZ Top beard, nice hat, should have been a Dolmar. You'll get the joke if you were at Dan's.

You may find they him-haw or dance around a question not because they don't know or they are lying, maybe they just don't want to answer the question right now. Whether it's talking to an engineer or a saw builder you'll have that. Even I do that to guys that ask," What did you do to my saw? It didn't even cut like that when it was new." and all I did was sharpen their chain and touch up the muffler. You think I want to spend hours explaining cutting angles and air flow or go back to what I was doing that was more important to me than talking right now?

 

[woodsjunkie]

I was one of the operators that ran both, stock 385 and the 7900.
There is no doubt the 7900 was noticeably faster and felt stronger than the 385.
No excuses for the 385 it got shot down. Both saw wear set up identical as far as carb set up Paul had both saw set up rite.... he knows what he is doing. Both saw wear running at their best stock form.
IMO the 7900 wins hands down
hear is a vid of the stock 7900 in Brents hands

 

[tony marks]

al li wont to know is how my two 024s did. i sent them up with a young feller an his dad. if yall send u saws too me .. be sure and send them to my post office box.. with the 500 dollar moneyorder ,,o course.../ an remember ,,i cant gurantee
they will still run ,,when u gettum back.