can we have basic porting term thread?

[cobey]

Some of us newbies need to learn basic terminology, can we get help.
I know TDC bdc.... but blow down and stuff.

 

[mdavlee]

Blow down is time between exhaust opening and transfer opening.

 

[cobey]

I'm gonna get smarter before grinding
Anymore saws.

 

[awol]

Uh-oh Cobey, you ain't been grinding on that 064 have ya?!

 

[jmssaws]

Send all your 1122 saws to me for safe keeping.

 

[cobey]

Uh-oh Cobey, you ain't been grinding on that 064 have ya?!

No junky 024's and stuff, no failures
Yet..... I don't think the 064 needs grinding. I have made them better,
But I want to know why I'm doing
What I'm doing .i have copied what I have seen done before. I can make 4 strokes
Go real good. Need to learn 2 cycles

 

[cobey]

Send all your 1122 saws to me for safe keeping.

Witch are 1122's?

 

[Adirondackstihl]

 

[jmssaws]

Witch are 1122's?

064-066

 

[jmssaws]

What do they mean by "range"?

 

[czar800]

No junky 024's and stuff, no failures
Yet..... I don't think the 064 needs grinding. I have made them better,
But I want to know why I'm doing
What I'm doing .i have copied what I have seen done before. I can make 4 strokes
Go real good. Need to learn 2 cycles

You can send me those "junky 024's"

 

[Adirondackstihl]

What do they mean by "range"?

Broad power curve vs peaky power curve......
I assume

 

[MG2186]

064-066

How come they are called 1122's


Sent from my iPhone using Tapatalk

 

[awol]

What do they mean by "range"?

Broad power curve vs peaky power curve......
I assume

And also, total swept area of combustion chamber.

 

[jmssaws]

How come they are called 1122's


Sent from my iPhone using Tapatalk

That's the first numbers of every part on them. There 1122 series saw. 044 or 460 I can't remember which is a 1128 series.

 

[jmssaws]

Broad power curve vs peaky power curve......
I assume

They certainly left the door open for assumption.

 

[dall]

1128 is the 044 046 440 460 saws and the 1122 is the 064 066 660 saws

 

[jmssaws]

The latter is how I open the mains to keep from adding capacity.

 

[SixGun]

Some of us newbies need to learn basic terminology, can we get help.
I know TDC bdc.... but blow down and stuff.

Lots of great guys on here willing to help.
Probably best if you ask about specific things or terms to be explained

 

[ft. churchill]

This is a 272 jug, we would call it out as having closed ports (the transfers have their own external tunnels to the cylinder walls). This also what we term as a dual or two port transfer design. Pic #2 is the upper and lower transfers, one upper transfer per side, left hand and right hand make it a dual port. The lower transfer is at the top of the pic as the jug is upside down for photos. The exhaust port is on pic #1 and the intake is pic #3. I'll go get some more photos for the OP.