First port and question about timing for 346xp cylinder

[Mastermind]

I got one of these off Aliexpress, it seems to work ok but I can't say how long it will last.
https://www.aliexpress.com/item/1005002982012255.html?spm=a2g0s.9042311.0.0.dcd44c4dSC7oYz


View attachment 320413

Interested to see how well it holds up. 3mm collet?

 

[Ronie]

Interested to see how well it holds up. 3mm collet?

Yea, 3mm collet.

 

[Ronie]

The Chinese one is nowhere near as smooth as my mc182.

 

[Mastermind]

The Chinese one is nowhere near as smooth as my mc182.

I have 4 MC182s, and have had 2 of them rebuilt twice now. One of them was rebuilt once, and one is fairly new. The oldest ones have literally been used on thousands of jugs. By having several of them, I can swap handpieces rather than swapping bits. That saves a lot of time, and makes the collets last a lot longer.

 

[Ronie]

I have 4 MC182s, and have had 2 of them rebuilt twice now. One of them was rebuilt once, and one is fairly new. The oldest ones have literally been used on thousands of jugs. By having several of them, I can swap handpieces rather than swapping bits. That saves a lot of time, and makes the collets last a lot longer.

I'm only doing my own saws so mine should last me until I'm in the ground.

 

[Mastermind]

I'm only doing my own saws so mine should last me until I'm in the ground.

It depends on whether or not you have learned to control chatter. That's what hurts them.

 

[Ronie]

I'm talking about the mc182, who knows how long the Chinese one will last.

 

[Mastermind]

I'm talking about the mc182, who know how long the Chinese one will last.

Right on.

 

[Ronie]

It depends on whether or not you have learned to control chatter. That's what hurts them.

I think I got that down, when I first used it I was bouncing all over the place.

 

[Mastermind]

I think I got that down, when I first used it I was bouncing all over the place.

I still get it once in awhile, but its only if I miss my mark on the first cut. Going back into the left corner is tough to do without chatter.

 

[Redfin]

How would this affect the saws performance compared to the 124°?
Most of what I’ve learned so far has been in regards to intake and exhaust so I’m curious to learn about upper transfers and how lower transfer height affects saw performance as well as why it might be better to raise these?

Along with blow down you must factor primary compression planning trans opening. With those numbers you have a pile of primary duration.

 

[Headhunter1111]

Still got 135° on transfer opening today using the ring method. I ran it up to 124° and then pulled the jug to see how much these are off…. I wonder if my dentist would let me use his office?
@andyshine77 @huskihl @Mastermind
Is this much grinding on the transfers normal?
Still trying to figure out a reasonably priced right angle tool.

 

[Headhunter1111]

 

[Mastermind]

I'm surprised that's all it need to go up.

 

[Headhunter1111]

I'm surprised that's all it need to go up.

Ok good. I was getting askeered that I had an out of spec cylinder. I feel better now.

 

[Ronie]

I just went back and read your first post in this thread and noticed that your grindig on a Hyway titanikel cylinder, I ported one of these and befor you grind on it you should first take a diamond ball burr and grind the plating off where you'll be grinding, if you don't you'll get chipped plating like in your pic of the lower transfers. On mine I used a diamon burr first on the intake and exhaust but didn't on the upper transfers. I did the uppers without it chipping but when I pulled the cylinder the plating on the edge of the upper had started to chip away. even though it looked good when I had finished the burr must have lifted the plating and then it started comming lose while running, the intake and exhaust where I had used a diamond burr first still looked fine.

 

[Canadian farm boy]

View attachment 320662

Be very careful grinding those upper transfers or just on that cylinder in general. From the look of things that cylinder plating is very prone to chipping.

 

[Ketchup]

View attachment 320662

What your doing looks good, but that jug looks like junk. Lots of casting flash in the ports, awful chamfering. You see all the chipped plating where the bore meets the transfer lower? You may chip more at the uppers. Go carefully and when in doubt use a diamond bit.

Edit: you guys type fast!

 

[huskihl]

View attachment 320662

Yeah that looks pretty doable. Like Randy said, doesn’t quite look like 9° but pics are deceiving

 

[Ronie]

Pic of the chipped plating, that chip was stuck in the ring land.