husky t435 modifications?

[David Young]

has anyone modded these saws? Or should I say have any tips?

Thanks

 

[David Young]

Got these to work on

 

[CoreyB]

Subbing. I glanced at one and realized a MUFFLER MOD was going to be a challenge. The new 439. Is the rear handle version of the t435. I think that could be a neat saw.

 

[cus_deluxe]

I learned the hard-ish way that a muff mod is a lot easier than it seems, and they need it bad. A few screws on the bottom plastic pan and it comes off im quite sure without anything else needing removed. Muffler is 2 pieces, so comes right out the bottom. It needs to be uncrimped which was easy on the one i did. I also advanced timing a fair bit, like a whole fin on the flywheel, key completely filed off. Ran a ton better. Tuning it was a little wierd, im thinkin cuz the goofy strato valve setup on it.

 

[David Young]

Thank you I tore into it last night and know what you are talking about. A lot of tech went into this saw. I'll post some pics tonight. That flywheel is super cool

 

[Stackowood]

I worked on a couple last winter. Opened up the exhaust outlet area, the black plastic intake restrictor, and removed the limiters. I sold them both to climbers and haven't seen them back yet. The mounts are a little squishy and the recoil seems flimsy but they are decent saws for the price.

 

[David Young]

Tried to keep this video short 4 minutes

 

[paragonbuilder]

Tried to keep this video short 4 minutes

Interesting David. Looking forward to what you come up with. I haven't seen one of these yet.


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[David Young]

I am thinking I'm going out the front. With the exhaust. These are real tree guys they want a working tool. So I may try stuff not for us psp type.

 

[cus_deluxe]

Great video david! I ended up adding a couple more gills, directing them more upward, and cutting off a fair bit of the little deflector above the gills. Didnt wanna go too loud and it came out pretty well i think, but im sure more could be gained.

 

[SOS Ridgerider]

Interesting David. Looking forward to what you come up with. I haven't seen one of these yet.


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Dan, I've got one we can tinker with.

 

[bikemike]

I'd gut that and keep it big and open in there. I think that's why the 020t 200t were such animal saws cause they had a big exhaust and lots of breathing room inside the engine

 

[Stackowood]

On the two T435 that I brought back to life the starter pawl springs were broken and they are not available separately. Ended up finding another Husky pawl spring ( I think 338XPT) that will work.

 

[David Young]

I'd gut that and keep it big and open in there. I think that's why the 020t 200t were such animal saws cause they had a big exhaust and lots of breathing room inside the engine

Mike I have struggled with this. Basically two questions

Is a muffler possibly a tuned box that performs best at a tuned frequency the higher the frequency (rpm) the smaller the box should be.


Or

The larger the box the less resistance on the exhaust system. Meaning a more effective blowdown period.

 

[David Young]

Here's what I'm trying.

 

[jake wells]

a loop of stihl 63ps helps a lot over the crap they put on them at the factory.

 

[CoreyB]

Here's what I'm trying.

How does it sound?

 

[David Young]

How does it sound?

I'm going to try some other mods before I run it.

 

[bikemike]

Mike I have struggled with this. Basically two questions

Is a muffler possibly a tuned box that performs best at a tuned frequency the higher the frequency (rpm) the smaller the box should be.


Or

The larger the box the less resistance on the exhaust system. Meaning a more effective blowdown period.

That is a brain buster question. I do know the 200t top dog of all arborist saws has a big muffler under it like the husky your working on.
The 200t with a Lil muffler work can tune in at 15k with no other port work. But I personally think it's performance also comes from having a bigger exhaust to help rebound some pressure back to the cylinder for more compression. Compression is power. That's just my opinion

 

[bikemike]

I wish my echo had a bigger capacity muffler on it.