My 3120xp mods, share yours and or your opinions

[Moparmyway]

Does it get right in your face??

Not at all, the opposite actually.
It blows out, up, and away when felling, milling, or stumping.
Bucking up bigguns it blows out, down, and away.
You dont even get any hint of the VP that its running.

Appreciate the kind words too !
I also closed the pto side exit .......... so when stumping there isnt any dirt or dust getting blown at the stump and back at you.
When milling, the exhaust doesnt go down or towards the log, it clears away incredibly well.

 

[Lightning Performance]

Not at all, the opposite actually.
It blows out, up, and away when felling, milling, or stumping.
Bucking up bigguns it blows out, down, and away.
You dont even get any hint of the VP that its running.

Appreciate the kind words too !
I also closed the pto side exit .......... so when stumping there isnt any dirt or dust getting blown at the stump and back at you.
When milling, the exhaust doesnt go down or towards the log, it clears away incredibly well.

Closed the factory outlet on the 660 mill saw with the pipe. Big difference. I don't have the balls to cut up these nice 084 mufflers. A front cover with a pipe might work and preserve the stock wears.

 

[Lightning Performance]

Best mods I’d be able to do with a 3120 would just be to try and find an older non epa version.

What is the difference?
Here to learn

 

[kneedeepinsaws]

What is the difference?
Here to learn

Adjustable carb and unlimited coil. Possibly a more open muffler but im not sure on that

 

[kneedeepinsaws]

Not at all, the opposite actually.
It blows out, up, and away when felling, milling, or stumping.
Bucking up bigguns it blows out, down, and away.
You dont even get any hint of the VP that its running.

Appreciate the kind words too !
I also closed the pto side exit .......... so when stumping there isnt any dirt or dust getting blown at the stump and back at you.
When milling, the exhaust doesnt go down or towards the log, it clears away incredibly well.

Your welcome! What size of pipe is that?

 

[Hinerman]

Yes
Nah
Aint you too aged and wise to be pickin fights anymore ? (Lord knows I am)


Love this piped exit, milling is great, stumping is clean and cool, bucking and felling makes for fresh air no matter how I've used it
View attachment 253181 View attachment 253182 View attachment 253183 View attachment 253184
View attachment 253185

What is the "chatter" (for lack of a better word) noise in the video? Grabby chain maybe?

 

[Moparmyway]

What is the "chatter" (for lack of a better word) noise in the video? Grabby chain maybe?

Grabby chain and powerful saw ........ you can see it bouncing, which is what causes it

 

[Moparmyway]

Your welcome! What size of pipe is that?

Ummmmmm
Picture #4 .........

 

[kneedeepinsaws]

Ummmmmm
Picture #4 .........

Im canadian what does that mean??

jokes, i was at work missed that. YES WE CAN READ IMPERIAL AND USE IT MORE THAN METRIC. Just for the record.

thats fricken huge!!!

 

[Lightning Performance]

Adjustable carb and unlimited coil. Possibly a more open muffler but im not sure on that

Um... much more in-depth was my thought process but thanks.
No muffler and an air plate. No need for a hot muffler on the case but it's nice to swap the front cover to try new pipes. From scratch built headers are always best imo. Tubing and a flange is about all you need to get started.
Would like to really know if these newer 3120's vapor lock. Your not the first person to mention it recently. A flood limiter covers up a problem like that. They say 394's do it but many say no way. I'll buy an older one if new is an issue. Don't mind having fresh old tools. It is just parts. Everything Kevin mentioned and did made sense... like you did.

Most guys are just blowing smoke and talking *s-word. You guys are running these saw hard. I'm interested in any issues you find with these power heads. Problems can be avoid if you know what to look for and where. On Stihl I'm pretty good. Still learning big Husky with 38mm plus stroke, besides the 394 or 5. They were easy and simple really but good. It's just for milling. Next Husky saw here will be a 3120 or 2100 or version of modified a bunch to have it right to pull long bars constantly on a mill. I will keep trying different saws for different tasks till one suits me well enough.

 

[mdavlee]

Adjustable carb and unlimited coil. Possibly a more open muffler but im not sure on that

There was only one year supposedly that had a fully adjustable carb and I’ve seen pictures of one and none in real life. The older units had 12k coils and that’s plenty for 99% of the time.

 

[kneedeepinsaws]

There was only one year supposedly that had a fully adjustable carb and I’ve seen pictures of one and none in real life. The older units had 12k coils and that’s plenty for 99% of the time.

Wow i would have thought there were more years with adjustable carbs. Thanks for the info.

 

[davidwyby]

Fine!

 

[huskyboy]

View attachment 302956 Fine!

Clean the filter with soap and water. Dry it out, then oil it with a light coat of maxima fab 1 filter oil. No moar fines….

 

[Woodslasher]

View attachment 302956 Fine!

You need the foam filter, filter p/n 503141802 and filter cage p/n 503141601

 

[Nutball]

i put mine on a weight loss program...
View attachment 253132
dont need this stupid thing inside the muffler
View attachment 253134

Sometimes I wonder if these pipes found inside some mufflers are a way of tuning the muffler to help the power peak at a certain rpm, and how beneficial it would be to add a new larger diameter pipe when modding the muffler to keep the tuned effect. I made me a rough pipe size vs rpm tuning chart to keep handy in case I ever try it.

 

[cus_deluxe]

Sometimes I wonder if these pipes found inside some mufflers are a way of tuning the muffler to help the power peak at a certain rpm, and how beneficial it would be to add a new larger diameter pipe when modding the muffler to keep the tuned effect. I made me a rough pipe size vs rpm tuning chart to keep handy in case I ever try it.

my personal opinion is that those internal pipes have no other purpose other than noise reduction and resistance to keep unburnt fuel out the exhaust to a minimum. theres a reason “tuned” pipes are a couple feet long or more, it takes time and distance for the action to happen in a tuned pipe. heres a picture of a muff mod a guy did who had similar thoughts to yours….

edit: i should clarify; i dont mean to say those little internal pipes are useless, im sure they do contribute a bit to a more broad power band than if it were just a straight hole out the front, but i really doubt the folks who drew up that type of muffler design were aiming for an increase in performance, vs an empty can. more likely, to me anyway, is that it is a compromise that still allowed the saw to function, but also kept noise down and kept enough heat in to create the type of emmisions they were after.