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First port and question about timing for 346xp cylinder

Redfin

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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.
Agreed, working down to your marks with a diamond ball then cutting the aluminum will help with chipping.
 

Headhunter1111

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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.

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.

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!

Agreed, working down to your marks with a diamond ball then cutting the aluminum will help with chipping.

upload_2021-12-19_21-22-24.jpeg
Here’s me trying to grind away the plating. And seeing if I can get at the transfer without a right angle. It sort of works. Is this enough on the diamond ball with the plating or does it need more?
 

Ronie

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@Mastermind @Ronie @andyshine77 @Ketchup
@huskihl
Have any of you had luck with the stock carbs or does a ported 346xp need the bigger 357/359 carb? This one is an el-32. Worth upgrading?

I do have the new elbow and filter from a 359 for it.
Edited because I forgot huskihl
I wish I could help you, all 3 of mine have the 359 carbs on them and I havn't tried a ported one with the 346 carb.
 

huskihl

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Ketchup

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Stock carb is just fine. I think you do gain a little with the bigger intake setup. Walbro 191, 198, 199 or Zama EL42 all work well. You can always go back in if you want the bigger carb. Definitely not required.
 

Headhunter1111

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Well… .
I honestly don’t even know how I managed to accomplish this but to all those who said this plating chipped easily, anybody ever seen something like this?
Now what? New cylinder start over?
Just had gotten the transfers where I wanted them too
 

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Headhunter1111

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Chinese junk.

Should've started with oem. Cheaper than the titanikel and probably wouldn't have had this problem. I bought this cylinder when I did my 350/346. Machined, did some grinding... no headaches.

https://www.ebay.com/itm/Genuine-OE...p2349624.m46890.l6249&mkrid=711-127632-2357-0

Leave that Chinese junk in the trash bin where it belongs.

But HL Supply told me these were the best cylinders money can buy! :roto2nuse:
I tend to learn all my lessons the hard way. Anyone have a good set of numbers for a strong work saw using the oem 45mm cylinder?
 

farminkarman

I like the red & black ones
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But HL Supply told me these were the best cylinders money can buy! :roto2nuse:
I tend to learn all my lessons the hard way. Anyone have a good set of numbers for a strong work saw using the oem 45mm cylinder?
Why do you want to use the 45mm jug?
 
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