Wa11banger
Elite Veteran
Location: Huntsville, Al
| I have wore out plenty of bearings in my hypers, most of them due to age. I have an observation as to why the hyper can be a bearing eater just from what I and about 20 others have experienced with tinkering around with all the different brands.. Several have touched on it in here but not given a good observation to support it.
Lean Runs! simple as that in my mind. Now mind you I have no experience with the redline but between YS 50 and Hyper 50 and a regular OS 50H..
They hyper is way more tolerant of being run lean. The engine does not drop off the power band as easy when run lean, you have to be extremely lean to get the "cackle" noise out of it, and it also has to be extremely lean to hang on the pipe when you pull throttle hold. Remembering some of the posts, many people that complained about bearing issues also later posted a crusty or fried piston etc.
They YS engine is a click or two and lean is too lean they fall off the power band, cackle to give a good indication they are lean and hang on the pipe when you pull the hold switch when lean. All solid indicators you are baking them so people back off.
I beleive most failures from rear bearings are from people who are trying to squeeze everything they can out of an engine and not really understanding what lean is and/or they do not inspect thier engines from time to time to see how it is running.
I have a slew of Hypers, all shiny pistons, all many many many gallons old. Only two bearings replaced prematurely. Let's not go into my YS91's and rear bearings though that is a whole nother story and I think it was they bearings I was using and not the engines fault.
Knowing TT engines from the past, very hard to tune, lacking of power, had to tinker all the time and damn dont change fuel. TT will have a hard time overcoming this I hope the Redline is much better than the past.
Rick
Proud member of the Quick UK, Duralite Flight Systems, V-Blade, and K&B Dream Designs Teams |
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