Thank you Willw. Sure is a noisy bugger at that speed.
Glort, that video does have quite the annoying tone to it. Hopefully some of it is just the camera they were using. Plus they are running it wide open. The muffler is a pepper pot style which doesn't do much to quiet them down. I will definitely be finding a different style muffler. The cowling definitely blows hot air across the air filter snorkel and the injector line is routed between the cooling fins on the head so I would also assume they were making an attempt to aid this engine in cold weather.
38AC, I have dug into this thing a little further and the quality is definitely far above what I expected from and Indian engine. I would go as far as to say it is nearly on par with a western produced engine. The governor mechanism is pretty intricate and very well made. All of the injection parts are Bosch Mico and have traceable numbers on them. There are QC marks all over and in this engine so either a real attempt was made at QC or they were really attempting to fake it.
More info to come as I pull it down for inspection.