390XP VS 394XP

[danimal]

390 clears noodles best

My tree90 clears noodles bestest. Did yous look at da clutch cover in the pic I posted..die grinder does wonders.
NOT OSHA APPROVED!

 

[mdavlee]

My tree90 clears noodles bestest. Did yous look at da clutch cover in the pic I posted..die grinder does wonders.
NOT OSHA APPROVED!

Yep. I've got one even further than that for a stihls.

 

[Wolverine]

Wow, over a pound difference between our scales. Anything about the 395 that makes it heavier than a 394? I weighed mine with the big spikes, but who knows how accurate the scale is.

That's prior to the high top filter conversion and it does have the big spikes too.

 

[awol]

awol how are your 390xp's holding up are you doing anything to beef up bottom ends on them?

I've had to replace two cranks, but that was from ham-fisted operators prying to hard with a pinched chain.


Here is what seems to happen before any bottom issues. This saw had been in the woods for less than two weeks when it happened; it had a documented 33 gallons of 20:1 mix run through it in that short amount of time.

 

[MG2186]

I've had to replace two cranks, but that was from ham-fisted operators prying to hard with a pinched chain.


Here is what seems to happen before any bottom issues. This saw had been in the woods for less than two weeks when it happened; it had a documented 33 gallons of 20:1 mix run through it in that short amount of time.
View attachment 60738

*s-word, I never looked that close when you sent me that picture, what happened? Do we dare mention what he was running before he bought that 390 from you...... [emoji6]


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[XP_Slinger]

So what makes a 390 prone to bottom end failure? Since I don't own one I'd like to hear what some of the builders have actually seen that substantiates this reputation.

 

[peter92]

So what makes a 390 prone to bottom end failure? Since I don't own one I'd like to hear what some of the builders have actually seen that substantiates this reputation.

milling is hard on any crank , but dont know if it was doing that
Peter

 

[mdavlee]

So what makes a 390 prone to bottom end failure? Since I don't own one I'd like to hear what some of the builders have actually seen that substantiates this reputation.

Big end let's go. 50:1 and a lot of heat or too many rpm does it. I've changed about 7 or 8 in the past few years. They kill cranks and the 046/066 wear the bearing pockets out and the case is junk.

 

[XP_Slinger]

Big end let's go. 50:1 and a lot of heat or too many rpm does it. I've changed about 7 or 8 in the past few years. They kill cranks and the 046/066 wear the bearing pockets out and the case is junk.

Thanks for the response Mike. So when you mod a 390 what do you consider a safe "in the wood" RPM? Or even simpler; where do you no load tune a modded 390? Thanks

 

[Keith Gandy]

Thanks for the response Mike. So when you mod a 390 what do you consider a safe "in the wood" RPM? Or even simpler; where do you no load tune a modded 390? Thanks

I run my 390xp at 13800 with 404 on it noodling. Hadnt seen a problem yet but of course I run RED ARMOR!!!

 

[mdavlee]

Thanks for the response Mike. So when you mod a 390 what do you consider a safe "in the wood" RPM? Or even simpler; where do you no load tune a modded 390? Thanks

Under 14k is what I would stay for a work saw.

 

[awol]

*s-word, I never looked that close when you sent me that picture, what happened? Do we dare mention what he was running before he bought that 390 from you...... [emoji6]


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It was being transported under the arch on a skidder; operator didn't know it was there.

Not without causing a lot of butt-hurt. You know I don't like to cause trouble!

 

[RIDE-RED 350r]

Under 14k is what I would stay for a work saw.

I usually tune my ported 357 and 372 to about that despite the fact that both will run 14.5+ and still 4-stroke a bit. I like them to clean up in the cut. I've also switched to 32:1 for a bit more protection since they are running a bit faster than stock.

Wonder if changing to 32:1 helps a high strung 390?

 

[mdavlee]

I usually tune my ported 357 and 372 to about that despite the fact that both will run 14.5+ and still 4-stroke a bit. I like them to clean up in the cut. I've also switched to 32:1 for a bit more protection since they are running a bit faster than stock.

Wonder if changing to 32:1 helps a high strung 390?

32:1 for sure. I've had 390s up to 15k but that was short bars and only playing.

 

[XP_Slinger]

32:1 for sure. I've had 390s up to 15k but that was short bars and only playing.

Like my bother @RIDE-RED 350r I keep my woods ported saws (357 & 372) tuned at just under 14k unless I'm playing around and trying to prove something. I also run 32:1 now, I submitted to my bro on that one...lol.
Sounds to me like if you don't have unreasonable expectations (i.e. Keeping the tune at 14.5k+) a 390 "should" last as long as any other saw out there with maintenance and a safe tune.

 

[danimal]

[QUOTE="RIDE-RED 350r, post: 341985, member:

Wonder if changing to 32:1 helps a high strung 390?[/QUOTE]

YEP!

 

[Fairways_and_Greens]

View attachment 60690 View attachment 60691

Not that it makes any difference for milling, but here are the weights for the 395xp and 390xp, with spikes, no fluids, on my cheapo Target bathroom scale...

395xp - 18.8 lbs

390xp - 16.0 lbs

Which one do you find yourself using more? I'm thinking 80% falling/bucking and 20% milling.

 

[MG2186]

I really don't see how anybody can compare a 390 to a 395. A 395 is a tank compared to a 390. Me personally I would buy a ported 390


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[Fairways_and_Greens]

I really don't see how anybody can compare a 390 to a 395. A 395 is a tank compared to a 390. Me personally I would buy a ported 390


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What about a 390 compared to the 288?

 

[angelo c]

What about a 390 compared to the 288?

That's like comparing an old shovel head hard tail to an Evo Softail....
A 390 is smoother gentler on you all day but the 288 sure will make you smiley faced all day...just not with the saw in yer hands ....all day long.
For me nothing sounds like an idling 288xp when ported....that ping.ping..pop pop ping ping is wayyyy cool..

And that's coming from a Stihl guy.