Rev-Limiters?!?!

[THALL10326]

doin good champ. no killing trolls...might be bad luck.....or is it good luck....I'm so confused

Awwwwwwwwww good to hear. Glad to see you back and doing good...

 

[THALL10326]

If you kill the Troll, then Talon and Ultra will be fighting over the Witch :jawdrop:

Naaaaaaaaaaaaa I wouldn't dare hurt Sawtroll, I likes the ole feller. He and me are quite different. He likes specs, I like sawing. He considers weight, I consider muscle. He knows his saws and I know them too but not in as great detail as him. So I can't kill him, he gives me good info,LOLOL

Naaaaaaaaaaaa Sawtroll is alright. We disagree on alot of things but remain civil just the same, way it should be.

Them boys are gonna have to figure out another way to steal Witchy cause Sawtroll and me aren't gonna fight and leave the door open for them boys,hahaha

 

[Urbicide]

So what about rev-limiters? opcorn:

 

[SawBum]

So what about rev-limiters? opcorn:

Good point Urbicide, kinda got off track here, but I wanted to touch base and say hello to Tom and Mow. Sorry

 

[Urbicide]

Good point Urbicide, kinda got off track here, but I wanted to touch base and say hello to Tom and Mow. Sorry

Nothing to be sorry for Bum.

 

[Tzed250]

Naaaaaaaaaaaaa I wouldn't dare hurt Sawtroll, I likes the ole feller. He and me are quite different. He likes specs, I like sawing. He considers weight, I consider muscle. He knows his saws and I know them too but not in as great detail as him. So I can't kill him, he gives me good info,LOLOL

Naaaaaaaaaaaa Sawtroll is alright. We disagree on alot of things but remain civil just the same, way it should be.

Them boys are gonna have to figure out another way to steal Witchy cause Sawtroll and me aren't gonna fight and leave the door open for them boys,hahaha

Tom is Billygoat Gruff...:hmm3grin2orange:

 

[spacemule]

The story of a fat azz saw

Well, at least you got something right! :hmm3grin2orange:

 

[Lakeside53]

Apart from being more difficult to adjust optimally, there's nothing wrong with rev limiters. If the basic engine design is too high reving for the lubrication, materials or construction, rev limiters keep it is the safer zone.

 

[Just Mow]

Apart from being more difficult to adjust optimally, there's nothing wrong with rev limiters. If the basic engine design is too high reving for the lubrication, materials or construction, rev limiters keep it is the safer zone.

Is that why Dolmar uses them. Can't handle the RPM's:monkey:

 

[rahtreelimbs]

Is that why Dolmar uses them. Can't handle the RPM's:monkey:

From what I have heard the 7900's can take a lot of RPM's!!!

 

[Just Mow]

From what I have heard the 7900's can take a lot of RPM's!!!

 

[Lakeside53]

Is that why Dolmar uses them. Can't handle the RPM's:monkey:

Not going for the bait... too hot today..

The porting makes the engine natutally "overspeed"; the limiter keeps it in control. Just a different design approach from Stihl.

On all rev limited coils it would be nice to have a "test link" to disable the limiter for tuning.

We have to remember though - 99% (SWAG) of people (AS members excluded) NEVER tune their saws..

 

[Andyshine77]

A few saw builders have ran the 7900 way past 13,500 rpm just to see if they would break, they held up just fine.

 

[huskydave]

I have to agree with lakeside. The Engineers know what the engine can take and the rev limiters are for some added protection to the vital components of the engine and it would seem in the cut rpms are what matters to us anyways not what the saw will turn with no load right. I don't know about the 575 being a prince but maybe a jester for now until we get more feedback hahaha. I have read a lot about this model and it seems solid so far. I did read about some crank bearing failures but the person running the saw may have tuned it wrong or it could be just that first year problem that never shows up again what I mean is look at anything that has an engine the first year is the learning curve after that the manufacturers know what problems to fix and fix them promptly before the next year as to avoid a recall. I would buy one if I could not track down a 372xp. I thought the size and weight of the 575 made the 372 look very attractive personalty but I think the 575 will hold it's own.

 

[redprospector]

A few saw builders have ran the 7900 way past 13,500 rpm just to see if they would break, they held up just fine.

I've got a 7900 "race saw" that runs good at 16,000 rpm. It'll turn over 18K but looses torque, and the bearings probably wouldn't last long at that rate.
But it really likes 16K.

Andy

 

[SawTroll]

I recall the 575 being called everything from a boat anchor to it won't run when cold, blowing bearings and on and on. That was a while back. Spike claimed he had no such issues with it and that his customers liked it as well as the old 372. Since then I haven't heard anymore about the 575 so I assume its not what it was claimed to be awhile back. Other words its turned out to be a good saw, cool I say. The 441 was shot at alot too when it first come out but since then has proven the critics wrong, hold on, patting myself on the back,LOL

I believe most of those "shots" was about its weight, compared to the 440 and 460, and a few about its "fat-azz" shape - not about its performance as such.......:hmm3grin2orange: :hmm3grin2orange:

Those two (admittedly minor) issues + the fact it was a new model, was enough for me to loose interest - and I had wanted a 372xpg for years.......

 

[SawTroll]

Long time no see Bum, how ya been? Yeah this time round the Troll will meet the Hall face to face and duel over the Prince(441) and the Queen(372). Hopefully neither of us will have to die,LOLOL The last chapter will be a doosey for sure. Hold me to this so I don't forget. It will be just like ole times for sure...

Sounds like fun....

....but we will need Ben and Treeco and others to join, as last time, to stir it up in the beginning at least.....

:chainsawguy:

 

[belgian]

You still remember the Prince, daymmmmmmm, that was a thread wasn't it??

The Prince was a classic, voted best thread in 2006 (by me at least ...)
Those were the times....:hmm3grin2orange: :hmm3grin2orange:

 

[litefoot]

I believe most of those "shots" was about its weight, compared to the 440 and 460, and a few about its "fat-azz" shape - not about its performance as such.......:hmm3grin2orange: :hmm3grin2orange:

Those two (admittedly minor) issues + the fact it was a new model, was enough for me to loose interest - and I had wanted a 372xpg for years.......

Whoever you are, release Troll immediately. You're an imposter! Calling "weight" a minor issue. Right. Witchy, call the cops!

 

[litefoot]

Is that why Dolmar uses them. Can't handle the RPM's:monkey:

Actually, Stihl loves those 7900 rev limiters. Less embarassing for the 460's.