Transfers

[Stihlbro]

Here is a Dolmar cylinder of what I believe is a cutoff saw. I'm sharing as these transfers make me wonder what the engineers were thinking?

 

[Motorhead]

I've worked on a few stihl cutoff saws, That actually looks better then the cylinders I did.

 

[junkman]

Cut off saws are made to spin low rpm ,6500 i think ,I think thats why they choke them town ,the xpw husky jugs are choked down also ,from 375k saw

 

[Adirondackstihl]

Looks like a 7900 cylinder with a little curve thrown in there

 

[Stihlbro]

It's a 50mm bore. I think the cut off saws engine turn close to the same rpm, it's the pulleys that limit the cutoff wheel to xxxx number of rpm.


A lot is going on in the ducts with angles, shapes and flow characteristics.

 

[Adirondackstihl]

I have one of these cylinders with piston NIB if anyone is interested

 

[Stihlbro]

7900?

 

[Adirondackstihl]

7900?

7330/7335

 

[Mastermind]

I think they are looking at flow dynamics. Start it off heading in the direction you want to exit at. Pure genius......

 

[Sty57]

I always wondered why are the upper ports are almost a 90* corner. Wouldn't it be better to have a nice rounded entry coming out? Instead of slamming into a wall and coming out into the chamber.
I would think that would cause a bunch of turbulence in the tunnel before it escapes.

 

[Mastermind]

The roof of most transfer ports are more rounded than they look.

 

[Basher]

I think they are looking at flow dynamics. Start it off heading in the direction you want to exit at. Pure genius......

With a little grinding and some filling the transfers is where its really at.

 

[Red97]

Along the same line as Randy.

Don't know what the sides of the jug are like, but looks as if they are attempting to angle and add some "swoop" to fairly stright transfer tunnels.

 

[Stihlbro]

Side view.

 

[Deets066]

I hate transfers. I just want to cut the jug in half and git right in there

 

[Stihlbro]

Lol! I HEAR YA!!!

 

[Red97]

I hate transfers. I just want to cut the jug in half and git right in there

Old school speedometer cable, adhesive sandpaper and a small piece of plastic pipe on the other end.

Go wild, let me know how well it works....

 

[Deets066]

Old school speedometer cable, adhesive sandpaper and a small piece of plastic pipe on the other end.

Go wild, let me know how well it works....

Your gunna have to spell this one out for me

 

[Stihlbro]

Homemade flex shaft sander. Use to clean out stopped up egr passages with a old speedometer cable connected to a drill. It's like a flexible wire brush.

 

[Deets066]

He left out the drill part, I thought he wanted me to run it by hand