Ported Saws... Lets see your work fellas

[Nutball]

It does well enough. I had used it for some hardwood the day before that video, and it did well, but it's only 34cc, so it's no match for the ms250 or 260. Pine is all I had available for the video at the time, it's a year old, but not punky yet. Keep in mind most saws make peak power around 9500rpm.

It will have very good low end torque once I increase compression lowering the exhaust port, as it is too high right now. I might tweak the intake too. I tried a bigger carb on it, but the results were not impressive. Gas guzzler with little to offer on the low end, but I ran into fuel line kinking issues, and didn't get much testing done.

 

[BigSachsDolmar]

It does well enough. I had used it for some hardwood the day before that video, and it did well, but it's only 34cc, so it's no match for the ms250 or 260. Pine is all I had available for the video at the time, it's a year old, but not punky yet. Keep in mind most saws make peak power around 9500rpm.

It will have very good low end torque once I increase compression lowering the exhaust port, as it is too high right now. I might tweak the intake too. I tried a bigger carb on it, but the results were not impressive. Gas guzzler with little to offer on the low end, but I ran into fuel line kinking issues, and didn't get much testing done.

For 34cc its impressive nicely done

 

[BigSachsDolmar]

I'm not sure, I'd share the numbers I used but I had some help with them and they arn't mine to share.

Ever play with the old jred 450? I got 2 complete and one parts saw.. parts saw is a 510sp and has 2mm bigger bore which could be fun...

 

[Nutball]

This is the first 352 I ported with a little extra compression. I never timed it, but I have a rough idea of what the numbers might be to base this second one off of. It felt like it had good torque, but I thought I could do better.

In Ash, stock vs ported, about 31.5 seconds stock, about 21.5s ported.
View attachment 1st 352 stock vs ported.mp4

 

[R&R]

This is the first 352 I ported with a little extra compression. I never timed it, but I have a rough idea of what the numbers might be to base this second one off of. It felt like it had good torque, but I thought I could do better.

In Ash, stock vs ported, about 31.5 seconds stock, about 21.5s ported.
View attachment 1066

I find it funny, bark on those logs looks just like maple on @chainsawmaster1000 's. But you are wrong!

 

[Ronie]

Ever play with the old jred 450? I got 2 complete and one parts saw.. parts saw is a 510sp and has 2mm bigger bore which could be fun...

No, I've never ran a 450 or a 510.

 

[Nutball]

Echo 590

 

[EggShooterist]

View attachment 1012 View attachment 1013

Nice work as always bud.

 

[Ronie]

440 hybrid I just finished, ported with the goal of being able to pull 30" bar in hardwood so it's not a screamer but holds the RPM well with the bar buried.

 

[EggShooterist]

440 hybrid I just finished, ported with the goal of being able to pull 30" bar in hardwood so it's not a screamer but holds the RPM well with the bar buried.

You do some beautiful port work bud.

 

[Bjorn T]

440 hybrid I just finished, ported with the goal of being able to pull 30" bar in hardwood so it's not a screamer but holds the RPM well with the bar buried.

Keep up the good work. Very nice grinding.

 

[Ronie]

You do some beautiful port work bud.

Keep up the good work. Very nice grinding.

Thanks guys!

 

[Ronie]

@Nutball how did your 590 turn out?

 

[Nutball]

I found those pictures recently when trying to remember what timing numbers I used on that 590 I posted a video of earlier:

Ported Saws... Lets see your work fellas

That's what I do to some of mine and sort of what I did to the 352. I like to widen and blend upward that intake side corner. Echo 620p and 590 I ported, cutting dryish Ash. The barkless log was 2 year old really dry Ash, you could see the chain starting to dull after 3 cuts when looking at the...

chainsawforum.com

I don't think I recorded the numbers anywhere. It runs strong in the 8000-10,000rpm range, I think it could be doing 6.0hp.

Looks like you are trying to hold around 11,500rpm with the 440, going as low as 10,000rpm, so it appears to be doing very well.

I'm about to finish the 395 and 9010, but won't get any video for a few weeks.

 

[Buxton_Work_Saws]

A little 372 action!! 268 piston with finger ports.

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[Ronie]

A little 372 action!! 268 piston with finger ports.

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Cuts and sounds great!

 

[Nutball]

A little 372 action!! 268 piston with finger ports.

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Why a 268 piston?

 

[Ronie]

Why a 268 piston?

My guess is to make a pop up out of the taller piston, I have two with 268 closed sided pistons in them.

 

[Buxton_Work_Saws]

Why a 268 piston?

Taller, lighter and Single ring .. I used the windowed version to help feed my fingers. worked quite nice. Intake ended a little low once I got it dropped enough to make the compression I was looking for with my exhaust height..... Just playing around trying new stuff. Gotta keep it interesting.

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[Nutball]

Makita 9010 air filter mod. I removed the fuzzied coarse metal screen and it now flows much better, is easier to clean, and filters out finer dust.