porting video series

[Stihl working Hard]

Great videos Scott thanks for sharing

 

[tree monkey]

 

[cus_deluxe]

Great stuff scott, glad to see you recycle your mountain do cans in the epoxy process.

 

[tree monkey]

hey stevie ya need to work on you editing skills

 

[CJ Brown]

hey stevie ya need to work on you editing skills

I think I remember that intro music from a scene in Debbie Does Dallas

 

[cgraham1]

Takes time and patients to film this stuff. Nice work Scott

My Dr. has lots of patients.

 

[MustangMike]

Great stuff Scott, Thanks, don't really have enough time to keep up with it in Tax Season, but I'll be back tomorrow!

 

[wcorey]

I normally make the entry angle of the upper transfer roofs flat and try to maintain it as far back in to the tunnel as is practical without breaking through. Sometimes that's not very far if the cylinder got dropped down a lot...

But on the last couple saws I've tried angling the primary side up a bit and tapering to flat toward the secondary side.
I'm assuming the secondary end covers the 'dead spot/corner'.
Figure I can try it and then go back in and flatten it out all the way to see if there's any difference. Nothing new, I'm sure, just new for me...

'By the book' there's supposed to be some narrowing and shifting of the power band upwards as the roof gets flatter but as typical that may apply more to larger/piped applications, I dunno.

Waste of time?

 

[tree monkey]

nothing is a waste of time, it's a lesson one way or another

 

[Deets066]

I normally make the entry angle of the upper transfer roofs flat and try to maintain it as far back in to the tunnel as is practical without breaking through. Sometimes that's not very far if the cylinder got dropped down a lot...

But on the last couple saws I've tried angling the primary side up a bit and tapering to flat toward the secondary side.
I'm assuming the secondary end covers the 'dead spot/corner'.
Figure I can try it and then go back in and flatten it out all the way to see if there's any difference. Nothing new, I'm sure, just new for me...

'By the book' there's supposed to be some narrowing and shifting of the power band upwards as the roof gets flatter but as typical that may apply more to larger/piped applications, I dunno.

Waste of time?

Try the opposite. Primary’s flat and secondary’s tapered up a bit. It has worked well for me

 

[srcarr52]

'By the book' there's supposed to be some narrowing and shifting of the power band upwards as the roof gets flatter but as typical that may apply more to larger/piped applications, I dunno.

I think you have that backwards.

 

[wcorey]

Oops, I guess back to completely flat they go.

I was looking at it as the closer secondary getting to the bottom corner first and pushing it up the wall where the later arriving primary then could get up under it all and continue pushing up/out.
Seems like a flat secondary would be better at sweeping the corner.

But yeah, I can also see the up angled primary side getting pushed out the exhaust sooner and the up angled secondary the one being able to dwell longer...

Btw this is on dual (066) ports, not quads.

Transfers twist my brain...

 

[huskihl]

Of the few saws I've done lately, an echo 680 has transfers exactly how Scott describes his way of porting. The exhaust side transfers open about 4 degrees earlier than the secondaries. They open even with the top of the piston and blow 90° to the wall. Secondaries open even with the top of the piston and angle up slightly about 4 degrees later

 

[huskihl]

I've also seen other saws that ran really strong where all four transfer port roofs were blowing the charge up on an angle rather than across the top of the piston. The motorcycle books all talk about torque being the same regardless of roof angle but flatter roofs shooting across the top of the piston produce more horsepower. I don't have enough testing equipment to prove if that works in a saw or not

 

[tree monkey]

 

[Stump Shot]

hey stevie ya need to work on you editing skills

I think I figured it out, you are getting out of the saw business and going to start making air filter vigjas full time. Lol

 

[tree monkey]

I think I figured it out, you are getting out of the saw business and going to start making air filter vigjas full time. Lol

that sounds good.
I wander if i'll get a raise

 

[Stump Shot]

that sounds good.
I wander if i'll get a raise

That would depend on the air filter in question at the time. Lol

 

[tree monkey]

 

[Stump Shot]

I can tell you've been into a few muffs before.