increased

A while back, someone posted this thesis which I finally had a chance to read. It was very well done by a student who took an FE570 engine and optimized the intake. Page 67 shows the improvement of his tuned intake vs. stock and page 62 shows the effect of varying the lengths of the intake...

My 650 -05 (164 hours) had a broken exhaust valve spring with a crooked valve as a result. Brought the engine to KEVA-motor (my closest Husa mechanic in southern Sweden) and their assessment was no damage to piston (a tiny scratch only) nor crank. Solution was to change all valve springs, new...