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By the way 365hp and the 420hp - has square port heads with Alium. Manifolds. If someone had switched motors and put the Alium. manifold on the peanut heads, your boat wouldn't run for ***
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Originally Posted by Muscar311
(Post 3768928)
I think your boat is right on. your in fresh water in a 311 SR1. The 25 will give you a better mid speed and less top end. 23's will give you more RPM and speed. A 4 blade (24) will give you even better mid but is hard on the drive if your jumping waves. My boat with dinged up 23's and 330hp 4400 and 62MPH But 65 in rough water. Small point -- salt water is faster then Fresh
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Originally Posted by Muscar311
(Post 3768936)
By the way 365hp and the 420hp - has square port heads with Alium. Manifolds. If someone had switched motors and put the Alium. manifold on the peanut heads, your boat wouldn't run for ***
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That setup will never turn a 25 plus thats basically a 27 p prop. Try a set of 25 mirage non plus and start from there.
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Salt more bouyant than fresh. It is faster
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My 311 with mags will turn a 25 pitch Mirage (not Plus) 4900 rpm and 68 Gps. Motors are stock except for Gil manifolds. Speeds are in salt water with slight chop.
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exactly what mine turned with the mags with intakes and emi thunder...
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