t4driller
Daddy Day Care
- Local time
- 5:28 PM
- User ID
- 927
- Joined
- Feb 23, 2016
- Messages
- 1,470
- Reaction score
- 5,590
- Location
- Southwest pa
361 on the bench. Got it all together lastnight. I adjusted port timing a little in it. 102, 128, 77. Ran a couple tanks through it today and it was really impressive. When I first ported it, seemed like a lost some of the torque. So I took the thin gasket out of base and took .015 out of band. Also gave it 2 more degrees of intake. Ran 2 tanks through it and was going great then on the third it started making like a popping sound. First 2 tanks it made it every once in awhile, but thought I was just hearing a little 4 stroking. Then on the third tank it got very noticeable so I shut it off and grabbed another saw. The first 2 tanks were about 45- 50 degrees out then the 3rd was 65 or so. I did advance timing in it. So does this sound like a timing issue or something else. I've never really had a saw do this. It's like a pop/ ping noise. Piston and cylinder looks good. What you guys think??