downunder,
I actually should have said more than I did....... chuckle......
A bunch of the engines today have ABC or such piston/sleeves, and almost all that're sold in the US are advertised to breakin with only a run or two. I was sort of trying to get across the burnishing deal. And didn't do it very well, did I. I should have added a couple more paragraphs, right? Truth is, some of us Yanks often called a slug piston by the nickname, "hard piston" to differentiate it from a ringed and from an ABC piston.
You know, the hobby shops around here don't carry Enya and I've yet to see them in any of the mailorder websites. They're still being made today? I guess you wouldn't mention them unless you could buy one, right?
The weak point with the S35 is the lower conrod bearing which isn't bushed and absolutely needs a minimum of 25% all castor.
You betcha, you're absolutely right about the lower bearing. What I was trying to do was face reality. Over here, most LHSs haven't stocked Fox Super Fuel in years. And I've not seen fuel with 25% castor in my LHSs since.... hmmm..... can't remember ever seeing it in this town, but I only moved here about 20 years ago.
I got to thank you for making me do a search online for Fox Fuel. They do still sell Super Fuel. It's $80/case before you add shipping.
http://www.foxmanufacturing.com/accessor.htm
It is 29% castor. About castor.... Today's oils don't have the "safety valve" that castor provides. But what I found with my experience with stunt motors was that you didn't ruin an engine with too little castor, you ruined them mostly with a bad needle setting. And you did it more often with fuel that had no castor. You can kill any engine with a bad needle even when it's running Fox Super Fuel. I've proven that more times than I care to remember. And that was with fuel that had 29% castor in it, not 25%.
I don't mean to cross swords with ya'.... not at all......
BTW, your post kicked me out of this chair and made me go down to the cellar and try to find my OS35S parts........ (I don't got no wine cellar, I got me a engine and parts cellar!!)
