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Stack o' Macs

I build a lot of poulan counter vibes and craftsman clamshell saws and stock to mildly ported, I remove the spark arrestor, drill the diffuser holes to 17/64" and open/reshaped the outlet slightly. It doesn't gain any noticeable rpm, but they pull much harder and sound like an actual saw.

I actually just popped on here to see if we could get a porting thread started. Happy to see you guys are one step ahead of me!

Here's my 046 ported with a pop-up.