Tecomec pistons (PORTING HELP)

[Mkinslow]

Thank you

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[drf256]

Never did a 365, but wouldn’t you want a bit more BD with the quad ports?

 

[huskihl]

Never did a 365, but wouldn’t you want a bit more BD with the quad ports?

Not really. They all seem to be right in there from 17 to 23. Other than the 7900, they like a little more

 

[MustangMike]

7900 and 660 are different because they have a longer stroke.

 

[Mkinslow]

Well, its started. Haven't hit the edges with ball yet.

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[Mkinslow]

Not a good picture or very good job with ball burr to chamfer edges. But a dremel with a 3" bit is kinda hard to keep from wobbling.

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[huskihl]

I'd spend some time on the edges with some 80 grit and get the edges of the nikasil knocked off. Take pics and zoom in and you can see it better

 

[mdavlee]

7900 and 660 are different because they have a longer stroke.

7900 has about the same case capacity as a 357 husky

 

[mdavlee]

I'd spend some time on the edges with some 80 grit and get the edges of the nikasil knocked off. Take pics and zoom in and you can see it better

Yep. I did a lot of bevels with a tiny piece of round file and 40-120 grit paper by hand before I had a round diamond ball

 

[Mkinslow]

Thanks guys. I'll see what else I can do with it.

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[Mkinslow]

Intake and exhaust widened. Intake lowered. Exhaust raised. Still have to check numbers and see.

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[Mkinslow]

Numbers as of now are
Ex. 104
Trans. 123
In. 76

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[huskihl]

Numbers as of now are
Ex. 104
Trans. 123
In. 76

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That'll be dandy

 

[Mkinslow]

That'll be dandy

Thanks. Gonna put it back together and see what happens this morning.

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[Mkinslow]

Well I didn't blow it up lol. Seems stronger than it was.

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[Mkinslow]

First video was 8 pin rim

Dont mind the zooming in and out. That's my son playing with it on my phone lol

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[Mkinslow]

Gotta get some better chain. All I had for my 20 was some old carlton. It may just be me but I think the 8 pin is faster.

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[huskihl]

Gotta get some better chain. All I had for my 20 was some old carlton. It may just be me but I think the 8 pin is faster.

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Your chain is a little dull or rakers might be high. An 8 will be faster until the chain starts to bite harder. Looks like you did a good job

 

[Mkinslow]

Your chain is a little dull or rakers might be high. An 8 will be faster until the chain starts to bite harder. Looks like you did a good job

Yeah I'm taking the rakers down some now. Trying to run it again before dark. I'm kinda tickled to be honest.

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[Mkinslow]

Well I put 3 tanks of fuel through the tecomec 365 this afternoon cutting some fire wood. Ran great and strong. I adjusted the carb ,backing out both high and low around a half turn and saw seemed to pick up and hold rpms better. Does this seem to be on par for a ported saw?

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