Mastermind Meets The MS661 Again

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
So are those three intakes different sizes to compare results ?.

No Andrew, one is with unfinished Devcon, the next is after finishing, then next is a stock port.

The factory port ends up at 85* after machine work. That's not crazy low on a 90cc saw, but I would like to be able to cut more from the squish to get the compression a little higher. At 85*, that's as far as I will lower the jug.

Even then I can't raise the transfers quite as high as I'd like to.

So, I'm at 102/122/85 on the two jugs without epoxy.

The jug with epoxy in the intake is at 100/120/80.
 
Interesting experiment. If you ever get in the mood to go slumming, look at the transfer port inserts in the newer Poulans. They use what looks like some sort of thermoset plastic to turn the open transfers into closed transfers. The rings don't quite touch it.

I don't know how that would help really, as you'd need some way to mold an insert, and some feature to retain it. Just food for thought.
 
If raising the floor gives you the results your looking for what is your plan of action On the remaining cylinders? Epoxy? Figure out an insert type piece?
 

Latest posts

Back
Top