Hi all, Well after 10 hours running (and not getting into the air) my Hirth F30U packed it in. The crankshaft is &*(%^* stuffed. (sorry for the bad language). A new crank is worth AU$3000 + dollars plus gaskets, bearings, etc.
There are extenuating circumstances which I won't air here. But the main problem is that Hirth could not help with my initial problem (running rough after getting hot), so I pulled down the engine on a fact find mission. The next problem is I've can't find a satisfied Hirth owner (let alone one with the same engine as I have), every one I've talked to has a complaint. So I'm thinking of scrapping the Hirth and putting in a Jabiru 85hp @ 60kg or 120hp @ 81kg. My Hirth is/was 92hp @ 52kg. The smaller engine is preferable as the weight will be easier to deal with, But we all want HORSEPOWER. 1. Is 120hp to much for a standard KR2? 2. Is 85hp to little for a standard KR2? 3. What hp is recommended for a standard KR2? (the Rand Robinson Engineering web page recommends a VW 2100, what hp is that?) Extremely Frustrated :-( Barry Kruyssen Cairns, Australia RAA 19-3873 k...@bigpond.com http://users.tpg.com.au/barryk/KR2.htm
