Oh I see, you're talking about the small front valve case. Mine are the heavier front case with the collet drive. I'll be ok while crashing.
Did another search and apparently a Stan Powell would do some kind of mod to the transfer ports but couldn't find the numbers. What's a good blow down timing for stunt, should I copy the 4050 timing?
MM
AFAIK, the #4011 was the small/fragile front end and Dykes ring in the .40, and after that, they made the #4050 and #4055 (which was what I had, ABC P&L). I don't know if the #4050 (R/C version) and #4055 had the same cylinder timing. But those engines are ungodly heavy for a .40. Mine was not a bad runner, but didn't put out the grunt that the .46LA did.
I usually used a Taipan 11-5 on the #4055 and maybe that wasn't ideal; tried some BY&O props from Clarence Bull, but I don't recall anything helping as much as the change to the .46LA/APC 11.5 x 4. I used a MACS Muffler on the .46, and an RSM tongue muffler on the K&B. I tweeked the stinger on the MACS Muffler a little to clear the wing. That was a nice combination, particularly for OTS and Profile.
The Hugemongoose will come out tailheavy without serious building care, so a heavy engine isn't a bad thing. Dave Royer flies his with a big Merco. I believe it's a .49, which was built on the same case casting as their .61. Nice setup; he usually wins OTS around here.
Steve