The Cut Report - After the Bench

[MustangMike]

Thanks, so much to learn and they all seem a little different from one another. I like the other two #s a lot. I think lower transfers provide better velocity.

 

[huskihl]

Wow, they like the exhaust that low??? Is it a short stroke engine. I'm trying to get things to make sense to me, Thanks!

45cc
110° exhaust opening
@longleaf owns it

 

[beaglebriar]

Thanks, so much to learn and they all seem a little different from one another. I like the other two #s a lot. I think lower transfers provide better velocity.

My other one is at 107 so I may raise this one up a bit. Not saying my numbers are perfect on this one. It's just a starting point and experimenting.

I also went with a larger carb and the 357/359 intake tract on this one. So I really expected it to be as good or better than the NE with stock carb/intake. It could be any number of things but I'll figure it out.

 

[Stump Shot]

32.5mm stroke and yes they like a low exhaust. My other one can be pushed on as hard as you want and keeps eating wood. I prefer a16" .325 bar but it'll pull a 18" 3/8 with authority as well.

My other one is at 107 so I may raise this one up a bit. Not saying my numbers are perfect on this one. It's just a starting point and experimenting.

I also went with a larger carb and the 357/359 intake tract on this one. So I really expected it to be as good or better than the NE with stock carb/intake. It could be any number of things but I'll figure it out.

Keep in mind that no two people time a cylinder Ed Zachery the same(learned that at Tree Monkey school), so might not be nothing wrong with raising the snaust just a titch. Then you may want to raise the transfers along with possibly too, peak in there and see what you think. I doubt seriously you will wreck it by doing so.
Could also be the different cylinders having some effect on it as well, I did one really low as it could go that worked out and the other I raised 2-3 degrees. Porting styles differ as well and who knows how many other factors are at play.
So long story even longer best I can say is find what works for you and then remember that for next time and even then it may be different.
Best of luck getting it to go, let us know what you find out.

 

[longleaf]

45cc
110° exhaust opening
@longleaf owns it

She loves it whatever you did. She’s a fast little mfer. I got to get a 357 intake like the one you had at masterminds. I believe that is the strongest worksaw I have ran in that class.

 

[Mastermind]

I'm trying to get things to make sense to me,

Let me know when you figure it out Mike. Everytime I think I have a handle on it, something comes along and throws a curve ball at me.

 

[MustangMike]

Randy, I wish I knew what you forgot!

It is fascinating though, I think I kinda know what to do with those Asian 440 BBs (I practiced on enough of them). As I got a little bolder with my porting, I got 2 of them to run petty darn good.

I know you are not a fan of BB or AM, but it was a low cost way for me to learn, and outside of Tax Season I have the time to play with them.

 

[MustangMike]

Question for ya Randy … When you come up with your #s for a saw … is it usually specific to that model, or are they more dependent on the size of the saw, or the stroke???

For example, I kinda think 440s and 460s (which have the same stroke) like the same #s, but 660s have a longer stroke and seem to like different #s.

Your thoughts?

 

[Stump Shot]

@beaglebriar

 

[beaglebriar]

@beaglebriar

I've been watching them. Good stuff!

 

[Stump Shot]

I've been watching them. Good stuff!

I think if I recall correctly @huskihl did a great job on the the exhaust port of that little hot dog he made. I ran one a couple years ago and they are all that. Might be take a look and see if it got wide enough, flat enough etc etc before you try and raise it.

 

[Mastermind]

Question for ya Randy … When you come up with your #s for a saw … is it usually specific to that model, or are they more dependent on the size of the saw, or the stroke???

For example, I kinda think 440s and 460s (which have the same stroke) like the same #s, but 660s have a longer stroke and seem to like different #s.

Your thoughts?

Design is more of a clue where to start than displacement usually. But you never really know without testing that compares different recipes to one another. Then....the wood can skew your results.

Some of my best recipes were found by trial and error I suppose. And, by being willing to try things that didn't agree with my preconceived notions.

 

[longleaf]

@huskihl the cover says 50cc. Was it changed out?

 

[Stump Shot]

@beaglebriar
On a different saw, but same problem, was not enough ignition timing to go along with everything else.
Correct me if I'm wrong @huskihl but seems to me it's hard to go too far on these little Husqvarna's.
I think I can recall taking most of the key out and it still not biting on the start ups.

 

[huskyboy]

I agree, as long as it’s the black coil. The blue ones seem to have a lot more aggressive curve and they idle kind of funky/inconsistent sometimes (the advance kicks in too early I think). They run nice in the cut though. Every husky I took the limited coil off of and fitted a black one with 1/3 off key advanced timing is smoother running in general imho. (350, 372xt/oe, 385/390xp). I only advance the blue ones a touch or not at all, too much and they pop or kick.

 

[huskihl]

View attachment 171254
@huskihl the cover says 50cc. Was it changed out?

Look at the top of the cylinder. I thought that one said 42. But I could be thinking of the wrong saw.

 

[longleaf]

Look at the top of the cylinder. I thought that one said 42. But I could be thinking of the wrong saw.

 

[huskihl]

View attachment 171268

@XP_Slinger owned it before and will know.

I can't get his name to highlight. Not sure what's up

Edit* fixed

 

[huskihl]

@beaglebriar
On a different saw, but same problem, was not enough ignition timing to go along with everything else.
Correct me if I'm wrong @huskihl but seems to me it's hard to go too far on these little Husqvarna's.
I think I can recall taking most of the key out and it still not biting on the start ups.

I don't really know. I've read where some say they don't advance the timing on some Huskies. As a rule, I always do. But like Mason said, there are so many different coils that what applies to one doesn't apply to the next. Especially after seeing some coils advance through 10k rpm, some do nothing, and some continually retard timing as rpm increases.

 

[beaglebriar]

@xp singer owned it before and will know.

I can't get his name to highlight. Not sure what's up

You're missing an "L"