Lightened flywheel, welded crank, HydroTec high compression head, coated pistons, Fiber reeds with massaged cages, custom tuner pipe....http://youtu.be/uqRzw5Tihu8
Any suggestions regardning compression? Mine has only 115psi even with 1mm lowered head (newer one, center plug). Is it enough to give some Powerr? Or should it be more around 150? The crank rods on this engine does not feel strong at all, very tiny ones, I wonder why yamaha put so small ones in... So is 115 enough? I would prefer lower comressions, since the engine should last long, as I use every day troughout the summer.
I get 180psi out of mine, but don't use it daily..
First start-up yesterday http://youtu.be/wbrnvExB7oM
Victor
Driver and mechanic at Estlander Racing
http://marinoswingcup.fi boat #30hydrospeed77 liked this post
Porting your engine will also affect your compression
Yes, I suppose that is why it has only 115 now, I raised the exhaust port 1.5mm.
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