T
TheWizzerd
Guest
Yup, it does appear to me that the left side transfer is off just a bit. After todays ride I pulled the head again to check, and it appears similar to the first. Can only see the transfer wash on one side.Cool airplane talk aside I would hazard a guess that the roof angle on one of the transfers is slightly off, or there is just something goofy about the shape, so the charge is not coming in perpendicular to the bore axis and/or being interfered with via turbulence in the bore. This can definitely cause a mixing of the exhaust and intake charge and force some of it out. Knowing how these iron sleeve cylinder ports tend to be I wouldn't be too surprised.
I say the left side as that's where we can see the brown wash, where its clean on the right as you would expect. The left wash is toward the intake as it should be, but roof angle is such that its causing it to leave deposits on the piston. Maybe blowing downward and back rather than up and back.
Sound about right?
However...this will have to be fixed with filler as there are overhangs, and that's what is causing it. They are as identical as I can reasonably get them. There may just be a slight burr/edge on the back side of the sleeve on that transfer causing it. Tough to get in there when not trying to change the heights. If I were opening them up to match the casting, it would be easier....but cant do that on this jug. I mean, I could, but that required additional work to make that work out that I don't feel up to.
I mean, its actually running pretty darn decently now, but.... well, you know......why would I leave it as is knowing something isnt quite right? Well, even if it was right I would still have to do SOMETHING to it.