How To Remove Aluminum Transfer Without Acid

[71dart]

That's a good question, Sunfish. I have a husky 55 cylinder that turned out about like that and I've been curious. I need to find a old, abandoned 55 to test it out on.

This 357xp cylinder was questionable, so figured I'd give it a shot. Removed a little platting around the exhaust port. Is this goin to be a problem?

 

[Mastermind]

I worry that the plating will peel off.

But.......it might not.

 

[sunfish]

I worry that the plating will peel off.

But.......it might not.

If it peels off, it'll just get blown out the muffler, right? No harm no foul...

 

[Mastermind]

If it peels off, it'll just get blown out the muffler, right? No harm no foul...

It will scuff the piston......but yeah, no great big deal.

 

[sunfish]

OK< this cylinder will be experiential, an stuff.

 

[nstueve]

I have had that happen on a couple cylinders. I usually use my foredom to take the exhaust down a few degrees and re-bevel the edge so it won't peel. Is this good??? probably messes with the power band a little but I feel better knowing it has less chance of shredding a new $40+ piston.

Am I wrong? Randy??? thoughts?

 

[Mastermind]

I have had that happen on a couple cylinders. I usually use my foredom to take the exhaust down a few degrees and re-bevel the edge so it won't peel. Is this good??? probably messes with the power band a little but I feel better knowing it has less chance of shredding a new $40+ piston.

Am I wrong? Randy??? thoughts?

As long as it doesn't free port, and it runs. Well.......that's a hell of a lot better than pitching a jug in the trash.

 

[nstueve]

As long as it doesn't free port, and it runs. Well.......that's a hell of a lot better than pitching a jug in the trash.

where would that affect power in the saw? I know raising the top of the exhaust gives more RPM and less torque and vice versa for lowering it... What does lowering the floor of the exhaust do???

Just trying to learn more...

 

[Mastermind]

It does nothing really. As long as the piston skirt doesn't end up into the port.

 

[nstueve]

It does nothing really. As long as the piston skirt doesn't end up into the port.

sweet. So no freeport = no problem!

 

[sunfish]

The top of the port is not much concern, as I probably have room to raise it enough to clear the problem. The jug will be lowered any way.

The bottom of the port is where the concern is, as I wouldn't want to grind any out of there. We'll see how close to bottom of the skirt is to it.

 

[nstueve]

The top of the port is not much concern, as I probably have room to raise it enough to clear the problem. The jug will be lowered any way.

The bottom of the port is where the concern is, as I wouldn't want to grind any out of there. We'll see how close to bottom of the skirt is to it.

I have a small jar of machine bluing that has a small "nail brush" attached to the lid. I will probably use that to mark the bottom of the skirt at TDC with cylinder in it's final position to see how much skirt I have left to play with. I figure I can pull the jug once the bluing is dried and I know exactly how much is left.

Randy,
How much overlap should one leave on the bottom of a piston skirt? I would assume you probably want 0.075-0.10" or more to keep the skirt closed against the cylinder wall???

 

[Mastermind]

I just look at it thru the exhaust port Nathan. If it is covering at all it will be fine.

 

[nstueve]

I just look at it thru the exhaust port Nathan. If it is covering at all it will be fine.

I was just saying that would be a good way to "pre-check" to make sure you have room to take the bottom of the exhaust down. Grinding first and checking later might end up in a free porting situation. Also you probably don't want to be so close to free porting that you catch the bottom of the skirt on the exhaust. Very unlikely, but better safe than sorry i guess...

 

[Mastermind]

Ah.........just use a pencil.

 

[jetmd]

Ah.........just use a pencil

Same thing the Russian's said after the USA spend over a million dollars on ink pens that would write
in zero gravity!

 

[alexcagle]

A 502 or 503 dremel paddle wheel works great as well.

 

[erikvr]

Is 80 grit not too coarse?

 

[Dan Forsh]

Is 80 grit not too coarse?

I was wondering the same thing.

 

[Mastermind]

I use 80 grit to "get started''.