Spuds Porting and Tuning Thread

[spudulike]

And don't forget to up the compression to 220psi, set your transfers to 16*, add finger boost ports, and set your exhaust to 185*. And the stock Stihl carb won't feed that beast at that point.

 

 

Well thats had a little work on it hsn't it:thumbup: Your own work??

 

Compression target is 200-220psi, with the ignition timing a few degrees advanced, ths will kick, blowdown - 16 - 18 is tha target with a fair bit of wideneing to the ports - just need the pop up done but Burrell has a bad bout of flu:thumbdown:

[wyk]

Well thats had a little work on it hsn't it:thumbup: Your own work??

 

Compression target is 200-220psi, with the ignition timing a few degrees advanced, ths will kick, blowdown - 16 - 18 is tha target with a fair bit of wideneing to the ports - just need the pop up done but Burrell has a bad bout of flu:thumbdown:

 

That's a bud of mine in Washington State. I think that's a 3120 or maybe a 394. I forget. I've only done fingers on a 55, and I recall that one blew up. That's two saws I have had actually explode on me. My 444SE blew it's top off at 245psi. Well, it blew the threads. My guess is they were torqued too much.

 

I tore my 2165/2177 apart last weekend. Part of the pop-up un-popped. Compression dropped considerably. Somehow the part that came off did virtually no damage to the cylinder. It just made a mess of the top of the piston and some of the combustion chamber. I cleaned that up. Added a new piston with a taller deck height. So compression is still up about 175 ish. Brought the transfers up a touch. Added 4* more intake to add more velocity to feed the transfers. I'll see about vids this weekend. I dunno, doubt my girl is gonna let me spend much time away from her. She's Irish. Don't make her angry. You won't like her when she's angry. This is her when she is mildly unamused because I'm a smart arse:

 

Edited February 11, 2014 by wyk

[Eddy_t]

How deep do you go with the boosts wyk? And with your missus, see if you can try to sneak the word potato into every sentence

 

 

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[spudulike]

How deep do you go with the boosts wyk? And with your missus, see if you can try to sneak the word potato into every sentence

 

 

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Thats a real good idea - that will be the last we hear of Wes:001_rolleyes:

[spudulike]

That's a bud of mine in Washington State. I think that's a 3120 or maybe a 394. I forget. I've only done fingers on a 55, and I recall that one blew up. That's two saws I have had actually explode on me. My 444SE blew it's top off at 245psi. Well, it blew the threads. My guess is they were torqued too much.

 

I tore my 2165/2177 apart last weekend. Part of the pop-up un-popped. Compression dropped considerably. Somehow the part that came off did virtually no damage to the cylinder. It just made a mess of the top of the piston and some of the combustion chamber. I cleaned that up. Added a new piston with a taller deck height. So compression is still up about 175 ish. Brought the transfers up a touch. Added 4* more intake to add more velocity to feed the transfers. I'll see about vids this weekend. I dunno, doubt my girl is gonna let me spend much time away from her. She's Irish. Don't make her angry. You won't like her when she's angry. This is her when she is mildly unamused because I'm a smart arse:

 

 

You were lucky, to get away with that, I had a 372 in this week, massive chunk missing out of the top of the piston - not a scratch or chip out of the cylinder! Loads of swarf that I have washed out of the cylinder and crankcase though!

[wyk]

How deep do you go with the boosts wyk? And with your missus, see if you can try to sneak the word potato into every sentence

 

 

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I think's that's why she was giving me that look in the first place. That was on skype. I was, like, "I gotta capture this look" and hit the prnt scr button.

 

 

As far as boost or finger ports, how deep ya go depends on how hungry you think the thing is gonna be, how wide ya want the port, how much meat is on the cylinder, and how crazy you are. It's a LOT of work. And they really aren't built to last - you are asking your rings to do a lot of work. It's really only for competition or showing off. A know a guy built a Partner with finger ports, and well, here it is:

 

[ame=http://www.youtube.com/watch?v=IaDUI_JICgI]Partner S65 9pin 10x10 - YouTube[/ame]

[peatff]

How deep do you go with the boosts wyk? And with your missus, see if you can try to sneak the word potato into every sentence

 

It'll be like a weebls cartoon at their house. That Partner video looks and sounds speeded up, it's like a mad wasp.

[wyk]

OK, nearly a full tank of fuel through her today just testing her and clearing a fallen Beech from the road. Much of the beech isn't touched. I'll do more vids on her when the time comes. This tree fell at the corner of the animal rescue I volunteer at most days.

 

Pushing 177 or so after 3/4 a tank using the Mercury outboard compression tester. The Proto said 176, so at least I know I can trust this gauge as well(it's way easy to use):

 

Plug looks OK. I can prolly get another 500 RPM out of her. She's just north of 14K right now.

 

[wyk]

And here's the vid of it after I finished clearing the road from some of the fallen Beech we had lost in today's storm:

 

[ame=http://www.youtube.com/watch?v=gzeF6_zIq_o]Jonsered 2165 BB test cuts with new piston - YouTube[/ame]

[wyk]

Here's the beech that came down today. I'll see if I can get some vids with longer cuts using both the 2165 and the 361. It's mebbe 3.5' DBH.