Squish dilemma/Porting opinion

[Paragon Builder]

Better yet I'll bring it and watch and learn!!


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[drf255]

Sanded .006 out of band. At .019-.021 now.

Problem (over)solved.




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[Paragon Builder]

Looks great! Can't wait to see video of you piss revving it!!!


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[KG441c]

Sanded .006 out of band. At .019-.021 now.

Problem (over)solved.

View attachment 464527View attachment 464528


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How did u sand that band?

 

[blsnelling]

I was able to get the exhaust roof down to 102.5* with an .054 square band cut.

So the question is this. I'm freeporting under the skirt on the exhaust side about .005.

A gasket will raise the exhaust. I'm trying to go with an exhaust vs. displacement rule of a 105* goal for a 50cc saw.

Hard as hell to get there with a Stihl 026. Even with a red lever jug, I could just get 103.5 with a .050+ SB cut

You really think?

I like crankcase compression. Wanted more to support the bridges and (physically) higher transfers, as well as the opened piston Windows.

I raised the roof a bit for more time/area.

The last one I did was at 78 and had a lot of spitback.

Would freeport help the spitback? Same question in the other thread. Or we will say will she pass gas??? Lol??!! Will the freeport venting the system allow the full charge to get in with the long intake duration and get rid of the spitback? Just thinkin out loud

Primary is degrees measured from when intake closes until transfers open.

Good rule is 40* on most saws.

My advice...get over the rules. Work with what the factory gives you. All saws have spitback. Give a saw what makes it run the best. I've seen no real evidence that bridge ports make much difference. I'm not a fan of the huge loss of integrity they produce.

 

[Paragon Builder]

I've seen no real evidence that bridge ports make much difference. I'm not a fan of the huge loss of integrity they produce.

What do you mean by loss of integrity Brad?


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[Deets066]

I've never seen a broken bridge port or a failure because of one.

The next 046 that I do I will do a before and after with bridge ports. And I'll see if it changes rpm or cut times. Even though it has already been tested

 

[Mastermind]

I've begun to avoid this site. It's not worth the headaches.

 

[Paragon Builder]

Porting is just a fad anyways. All it does is make a saw louder. [emoji33]


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[drf255]

I've begun to avoid this site. It's not worth the headaches.

You contribute alot to this site.

I can't like this posting.

 

[Moparmyway]

You contribute alot to this site.

I can't like this posting.

If you only knew of some of the headaches, you would be able to like it

 

[stihlbro]

Is this saw running yet?


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