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Did a quick dyno sim for tim.
merlin 345 flow file 10.6:1 254/254 114lsa .595/595 lift flat tappet cam single plane dominator The low lift cam and mediocre head flow seems to be the limiting factor. More lift would help it breathe at higher rpm. Or better heads. The duration is in range imo. |
I can't remember exactly, can look but my other set may be 16.5x26 with 4'hub if you want to try them.
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Originally Posted by MILD THUNDER
(Post 4650550)
I think id prob leave it be. I doubt bigger diameter will help him with his drives being deep.
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Originally Posted by MILD THUNDER
(Post 4650555)
Did a quick dyno sim for tim.
merlin 345 flow file 10.6:1 254/254 114lsa .595/595 lift flat tappet cam single plane dominator The low lift cam and mediocre head flow seems to be the limiting factor. More lift would help it breathe at higher rpm. Or better heads. The duration is in range imo. what software are you using. |
Originally Posted by frickstyle
(Post 4650542)
Yeah, I hear you on the cruise. Maybe try to acquire another "top end" set over the winter? If I recall, a 1" drop in diameter should yield +300-500 RPM? But 15.5" seems awfully small for your boat. Maybe try 24-25 pitch?
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The few sheets joe did for me earlier showed a 13hp gain from 5000-5500, not even worth effort of a prop change, I think this boat is still set up the way it left Cig/Hawk so it’s seeming to be spot on with what it is supposed to |
Originally Posted by MILD THUNDER
(Post 4650555)
Did a quick dyno sim for tim.
merlin 345 flow file 10.6:1 254/254 114lsa .595/595 lift flat tappet cam single plane dominator The low lift cam and mediocre head flow seems to be the limiting factor. More lift would help it breathe at higher rpm. Or better heads. The duration is in range imo. |
Ratio is 1.7 |
https://cimg4.ibsrv.net/gimg/www.off...62095c96c.jpeg https://cimg5.ibsrv.net/gimg/www.off...c41048d04.jpeg https://cimg6.ibsrv.net/gimg/www.off...12ca7b401.jpeg https://cimg7.ibsrv.net/gimg/www.off...07be9e9be.jpeg https://cimg8.ibsrv.net/gimg/www.off...8a28cb8b2.jpeg https://cimg9.ibsrv.net/gimg/www.off...c55bc52e0f.png https://cimg0.ibsrv.net/gimg/www.off...4c5a00e86.jpeg https://cimg2.ibsrv.net/gimg/www.off...215de6f8f1.png https://cimg3.ibsrv.net/gimg/www.off...d5949a5218.png Well, now that halloweeen on islands is over I will say I’m done for season, was going to possibly go but 42 degrees and rain just isn’t fun to me... been a a great season, went boating every weekend from beging of may, until beginning of October, I can’t conplain... one engine issue that i fixed in July, now need to freshen other engine heads so I don’t have that again, cleaning and painting things this winter making more details nicer. It does feel good to put boat away on my terms. |
Been a great summer added some pics for fun!! Best ride was my buddy’s new 52 OL that’s a bad machine! |
Originally Posted by Full Force
(Post 4656374)
Been a great summer added some pics for fun!! Best ride was my buddy’s new 52 OL that’s a bad machine! |
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