Yet another 346 build thread

[huskihl]

Oooooohhhh. Sexay lol

 

[mdavlee]

I was expecting that yesterday,

But how much is hot?

This thing has me a bit baffled. Ebay walbro 198, no mods with the blue diaphragm. ??
1 turn out on low 7/8 on the high side. Idles great.

Must be a fluke...

When the tune changes as you cut when it gets hot. If you were running it buried in cuts several in a row and it didn't you're good to go.

 

[shorthunter]

Nice work!

I fine the 346 needs no more than 190-200 psi.

Just got a couple oem 346 top ends for $105 each. So will be building another one soon.

Piston and cylinder kit or just the cylinder?

 

[mdavlee]

Piston and cylinder kit or just the cylinder?

Cylinder kits

 

[idiotwithasaw]

What about popups?

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[Red97]

What about popups?

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I think the cut squish method makes a stronger 346. Especially with a oem jug. Make plenty of compression, with .035-.040 off the base.

Only have to move the ports 5-10* to get back to good numbers.

 

[idiotwithasaw]

That's what I would try to avoid. I'm not confident enough in my porting. I wanna bump compression without having to adjust the ports. I may be asking for too much. I assume that if I did a popup right the only port timing I would really be changing is intake duration.

 

[sunfish]

Piston and cylinder kit or just the cylinder?

OEM P&C kits. The price right now is ridiculously low.

 

[sunfish]

That's what I would try to avoid. I'm not confident enough in my porting. I wanna bump compression without having to adjust the ports. I may be asking for too much. I assume that if I did a popup right the only port timing I would really be changing is intake duration.

I've done 4-5 saws without a degree wheel, the timing numbers are already good on the 346 & 357 . Two 346s' I did pop ups on and they haul ass!

One of em I didn't touch the ports, it's impressive, but will go back into that one and grind a bit.

Randy did one for me with a flat top. It's strong as hell, but not as fast as some 346s' out there.

 

[Red97]

That's what I would try to avoid. I'm not confident enough in my porting. I wanna bump compression without having to adjust the ports. I may be asking for too much. I assume that if I did a popup right the only port timing I would really be changing is intake duration.

I haven't done many saws. 3 to be exact, never bothered with a popup.

Not saying a popup isn't useful in some applications. But to get the most out of the effort the ports need to be timed and shaped proper for your end goal.

Maybe somone with more porting experience can chime in.
@mdavlee @Mastermind ??

 

[sunfish]

One interesting thing about the 346 Randy did. With .325 chain it would 4 stroke in the cut, had to push pretty hard to get it to clean up and it was tuned right. That is showing some power right there! It now wears 3/8-18" and is the saw I grab most often.

 

[idiotwithasaw]

I've put a 346 top on a 350 recently, all I did to it was have the base cut to get it to .020. It's now pulling 170 psi. It's a bad little saw too. I wanna do another one. But I was thinking of doing something different, and get my compression closer to 200

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[Red97]

One interesting thing about the 346 Randy did. With .325 chain it would 4 stroke in the cut, had to push pretty hard to get it to clean up and it was tuned right. That is showing some power right there! It now wears 3/8-18" and is the saw I grab most often.

.325x7 or 8?

I am going to do a comparison today with this 346.
16" 3/8×7 vs 18" .325×7 vs 18" .325×8

I believe my saw will have the same problem with the .325x7.

The videos in this thread are all with .325 x8.

 

[Red97]

I've put a 346 top on a 350 recently, all I did to it was have the base cut to get it to .020. It's now pulling 170 psi. It's a bad little saw too. I wanna do another one. But I was thinking of doing something different, and get my compression closer to 200

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All you can do is try it and report back. Worst case you are out some time and a piston.

Compression was my goal for this saw. But starting with an a/m jug the variables are all over the place.

 

[sunfish]

.325x7 or 8?

I am going to do a comparison today with this 346.
16" 3/8×7 vs 18" .325×7 vs 18" .325×8

I believe my saw will have the same problem with the .325x7.

The videos in this thread are all with .325 x8.

.325x7... It didn't 4 stroke as much in the cut with .325x8 & cut faster. But 3/8x7 is what it likes best.

 

[idiotwithasaw]

I may try it, what would you all start with. .020 popup. I've already checked squish without a gasket and it's at .015. So I if I went with a .020 popup I would assume that I would need to deck the jug .035 to get it where I want it.

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[sunfish]

I may try it, what would you all start with. .020 popup. I've already checked squish without a gasket and it's at .015. So I if I went with a .020 popup I would assume that I would need to deck the jug .035 to get it where I want it.

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.020" off the piston & .035" off the jug will give ya no squish, unless you use a gasket? Should be right on .020" squish with a gasket?

I don't remember the numbers I did, but I believe I ended up with .030" pop-up & .020" squish

 

[idiotwithasaw]

I'm gonna use a gasket, and it is an oem it's .020 thick.

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[sunfish]

I meant to say .020" with gasket (fixed it). That'll work just fine and is what I shoot for. I also run oem gaskets.

 

[idiotwithasaw]

Running a gasket is the only way to go. Especially if you have to tear it down again

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