Thanks, I'll check those out although the Franklin distributors here in the US want nothing to do with the helicopter versions, unless you're operating the 6V-350 (same cyl's) - I've talked to both of them. There are some minor differences that's why I'm looking for a parts manual. The cylinders are different - 14mm for the 200 and 210 HP and 18mm for the 6VS. Compression ratio is 8.5 to 1 for the non turbos and 7.0 for the 6VS (it's both cylinders and pistons that are different) and the carb is a MA6. You are correct in the fact that if you take the turbo off and change the carb to a MA4-5 it becomes a 200 HP. I have the Franklin letter on that along with the performance curves. Right now I'd be happy if anyone could provide the cylinder and piston part numbers.
Last edited by rotorgoat
on Tue Jan 06, 2009 6:28 pm, edited 1 time in total.