SOLD Nbws Echo 590

[David Young]

Here is a nice clean echo 590 I ported and modded the muffler I am selling the saw pho.
I figure the stock saw is worth $225
The porting magic pixie dust and copious bs is worth $25
I also deburred the plastic so I figure that is worth $50
Bringing the total to 300 plus ship pho

Here are some videos first is just a muffler mod
Then the ported saw vids.

It’s clear that there are some nice gains but I don’t have a sticker yet so the 40% may not have been met
NBWS will be my porting name

No balls work saw

We promise to live up to our name.

Mm

Ported

Ported noodle vid

 

[Fruecrue]

Air filters pics?
Snedding video?
GLWS.

 

[David Young]

Af pics later. Snedding may be a challenge. Snow is deep af

 

[David Young]

Moar piks

 

[Mastermind]

Here's a fantastic deal !!!!!

 

[David Young]

and sum mhore

 

[Nutball]

How much compression?

 

[Mastermind]

For anyone who may not know this......David was porting saws when I found these sites.

He's no rookie......but he's very modest.

 

[David Young]

Thank you Randy. I am not certain on the compression reading. I pulled the gasket but did not cut the base. It has some room to tighten the squish. If someone wants that done I would happily do so provided they are willing to wait a couple more days

 

[Nutball]

I wasn't sure. It looked like a base gasket delete only, but the transfers look raised a lot. Makes me wonder how much blowdown. I wonder if Echos in general need larger transfers?

 

[USMC615]

Nice 590...helluva deal!

 

[David Young]

I wasn't sure. It looked like a base gasket delete only, but the transfers look raised a lot. Makes me wonder how much blowdown. I wonder if Echos in general need larger transfers?

Oooo. Oooo op. I know I know

Lol

Don’t worry I raised the ex a lot too but still low numbers they a little different because of the long stroke. Still has real good torque.
I will share my build sheet with the buyer.
Thank you for the interest.

 

[Nutball]

Not saying it's bad, you had more gains than me from porting after the MM, so that's why I was wondering, though I only deleted the gasket and widened and raised the exhaust and rounded the rear transfers, and got no noticeable gains <5% over the MM. So the power is in the intake and/or transfers.... or a really high exhaust.

 

[GoBigBlue1984]

For anyone who may not know this......David was porting saws when I found these sites.

He's no rookie......but he's very modest.

Extremely modest. Anybody that has ever talked with David knows how well spoken and intelligent he is. The guy will *f-word anything....literally anything. But hes honest and knows a lot about this stuff.

 

[David Young]

Not saying it's bad, you had more gains than me from porting after the MM, so that's why I was wondering, though I only deleted the gasket and widened and raised the exhaust and rounded the rear transfers, and got no noticeable gains <5% over the MM. So the power is in the intake and/or transfers.... or a really high exhaust.

Well if this helps confuse you intake is stock lol

It’s more in the shapes my friend

Oh wait a minute what oil and mix ratio are you using?

 

[Nutball]

I can't remember what I used. I think super techniplate at 40:1 at the time.

I only compared times in your videos at first, now I compared rpm/load (sound). It seems you pressed a little harder on the ported version than the MM which can skew the results, but what I really find strange is how the ported saw sounds much louder, and the MM saw sounds about stock . Mine and yours might actually be similar performing side by side.

Anyway I had some less than perfect comparison videos of either my 490 or 590 because I didn't load them hard enough when stock, I expected them to cut fastest at a higher rpm like my 2188 does, but its is a somewhat peaky saw with depth gauges filed to match the peak.

 

[David Young]

I am sure our saws are close in performance. I like that you seem to have a healthy appetite for figuring the saw tuning mystery out that keeps most of us intrigued.

I recommend going to gtg. I wish I had sooner.

Also start collecting ported saws of reputable builders you can see what they do and it offers a litmus to compare your work against.

 

[dahmer]

Stock carb or a 620 carb?

 

[David Young]

Yes.....




lol just kidding. The carb is stock. From what I have seen the carb feeds it well, If I was going to upgrade something it would be the coil.

 

[David Young]

a deal is pending I will mark this sold when it is finalized.