have you ever run your ported saw in the forest cutting firewood or is it build for fun? Or tweeked saw in the woods? Without porting, add a larger rim like one or two pins depending on what cc your saw is. A rim and drum is less friction. Plug the governor, advance the timing a tad. If you don’t want to port it. On my old 70’s husky 240sg I put a 9 pin rim, plugged the governor. On my 266se husky I put a 8 pin rim and plugged the governor. On my 2100 added a 8 tooth rim, plugged the governor, advanced the timing a tad. How the chain is filed matters you must be a perfectionist with sharpening the chain. Open up the gullet. Speed cutting at the local fairs we used every trick in the book setting up the saws. In between the local fairs I would change the saw back to cut firewood. One year I didn’t change it back. My saws were eating wood.