Deputyrpa
Super OPE Member
- Local time
- 9:27 AM
- User ID
- 3090
- Joined
- Apr 27, 2017
- Messages
- 209
- Reaction score
- 588
- Location
- Fort Ann, NY
This old saw has seen every side of a skidder, and was given to me DOA. I was just going to mildly port it. In the manner of Bob Ross, I got caught up in the Joy of Porting.
"Start out with just a little burr - you don't need a lot! But don't be afraid of the big burr just because it's big. Put a huffing, puffing exhaust opening ... there; a pretty butterfly intake port ... over here; a very, very dark muffler ... lives right there. We're was not looking for detail here ... broad strokes. There is no right or wrong - the only rule here is that porting makes you happy. Happy accidents can be your best friend!"
Anyway, after the carb kit arrived, I rebuilt it, reset the jets to factory, and cranked her up. A few adjustments later I recorded the video. I did a gasket delete on it, and squish is a tight 0.017. Original piston and rings are giving a 190 psi reading. I did not touch the transfers. I'm really surprised it runs, and have only a faint idea of what I did. It doesn't idle down readily, as you will notice. I will slap a bar on it tomorrow, tune it, and see if or how it cuts. Worse case scenario is that it grenades and I get to do it again with Chinese parts. It'll be my Frankensaw.
"Start out with just a little burr - you don't need a lot! But don't be afraid of the big burr just because it's big. Put a huffing, puffing exhaust opening ... there; a pretty butterfly intake port ... over here; a very, very dark muffler ... lives right there. We're was not looking for detail here ... broad strokes. There is no right or wrong - the only rule here is that porting makes you happy. Happy accidents can be your best friend!"
Anyway, after the carb kit arrived, I rebuilt it, reset the jets to factory, and cranked her up. A few adjustments later I recorded the video. I did a gasket delete on it, and squish is a tight 0.017. Original piston and rings are giving a 190 psi reading. I did not touch the transfers. I'm really surprised it runs, and have only a faint idea of what I did. It doesn't idle down readily, as you will notice. I will slap a bar on it tomorrow, tune it, and see if or how it cuts. Worse case scenario is that it grenades and I get to do it again with Chinese parts. It'll be my Frankensaw.