Post up your ported cylinder Artwork

[ZukiRyder440]

Looking good buddy!

Thanks!

 

[huskihl]

Looks like the easy side to me, let's see the flywheel side port.

Not too bad on a 2 port.

362, 462, and a 620 Echo are the hardest for me because of the upward angle

 

[NightRogue]

288 roughed in

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[Lightning Performance]

Not too bad on a 2 port.

362, 462, and a 620 Echo are the hardest for me because of the upward angle

Hell Yes! And... the 600SX was a pia too but came out great with a tiny quench area and almost no volume. Under 1% in the pinch

 

[Lightning Performance]

Used a right angle for the first time today. DefiniView attachment 296144 tely something to get used to but its manageable.

In your first pic, see that bottom right corner in the upper transfer port?... make it point at the intake side not that radius round chit you see on most factory jugs and worse on the AM ones. Move that inside wall back and blend it in to the original bevel there at the exit. Don't open the port face or window but open and re direct the port area right before the exit point

Run your saw first then go back and make that change. See if you feel it in the cut.

 

[ZukiRyder440]

Like this?

 

[ZukiRyder440]

 

[Slumberjack]

View attachment 296212

Lookin real good lil buddy

 

[ZukiRyder440]

Thanks. Just got done putting her back together and she runs pretty good

Lookin real good lil buddy

 

[Slumberjack]

Thanks. Just got done putting her back together and she runs pretty good

Rock it and roll!

 

[Canadian farm boy]

395p jug.

 

[Lightning Performance]

@Canadian farm boy

Looks like you added some serious volume in the lower transfer area?

 

[Canadian farm boy]

@Canadian farm boy

Looks like you added some serious volume in the lower transfer area?

Yuppers. The lower transfers are tiny to start with. I didn’t touch the tunnels just opened up the lowers.

 

[Lightning Performance]

Yuppers. The lower transfers are tiny to start with. I didn’t touch the tunnels just opened up the lowers.

They sure are.
A member here sent me a bunch of roached jugs to set up bench builds and give the machinist something to stab at. The 395 is tiny down stairs. I opened up a 394 beyond crazy to gain more case volume in my mill. The cuts run right off the bottom of the jug. It came to me about ruined with crooked ports, terrible port openings and deep trenches cut to the bottom right through base skirt so I took out twice as much. The port now starts in the basement near the crank center line.
Have to dig out a pic from the cloud.

 

[NightRogue]

Yuppers. The lower transfers are tiny to start with. I didn’t touch the tunnels just opened up the lowers.

Contrary to popular belief, opening lowers and giving more volume adds power across the band.

If it didn't, those side fed style transfers cylinder/model would've been turds. Some of the small saws with side fed transfer got mind blowing area/size. Like 372,070 and so on

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[Maintenance Chief]

Yuppers. The lower transfers are tiny to start with. I didn’t touch the tunnels just opened up the lowers.

I see alot of people open the lower part of the transfers on old McCulloch saws also but honestly I don't know if I've seen one perform better in the cut then a well tuned one?
I mean being a clam shell design is a little limiting without being able to lower the jug and add compression.

 

[NightRogue]

I see alot of people open the lower part of the transfers on old McCulloch saws also but honestly I don't know if I've seen one perform better in the cut then a well tuned one?
I mean being a clam shell design is a little limiting without being able to lower the jug and add compression.

The only time you want tight transfer tunnels and lowers are when you're shooting for peaky high rpm, that'll narrow the power band. Opening up lowers and adding volume on clamshell is a cheap solution to add tq, since its tough to cut base and all.

Keeping transfers tight is equivalent to using crankstuffers. Good for low load high rpm application

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[huskyboy]

Not too bad on a 2 port.

362, 462, and a 620 Echo are the hardest for me because of the upward angle

Transfer roof isn’t flat?

 

[huskihl]

Transfer roof isn’t flat?

Correct. Plus it’s aimed hard at the intake wall so it’s difficult to get in there with the 90

 

[huskihl]

The only time you want tight transfer tunnels and lowers are when you're shooting for peaky high rpm, that'll narrow the power band. Opening up lowers and adding volume on clamshell is a cheap solution to add tq, since its tough to cut base and all.

Keeping transfers tight is equivalent to using crankstuffers. Good for low load high rpm application

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This is a little bit of a blanket statement. If the transfers aren’t big enough to allow enough flow, they act just like a restrictor plate. 372XPW comes to mind. 365 xtorq as well.