Offshoreonly.com - What Kind of Top Speed can I expect?

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Re: What Kind of Top Speed can I expect?

Quote:

Originally Posted by SHAGNASTY

This is a repower, came stock with 502ci 415 hp, no boxes. The boat ran 70 and did so for the last 3 yrs,currently running 81 on bravo 4 blade 26's @ 5000 with 6.5 lbs of boost, to be honest I was hoping for more top speed. The boxes are set at the highest setting, could lowering the boxes increase top speed? How about more fuel flow? Lookin for suggestions.

Something not adding up?? 26" bravo @ 5000 is aprox 72mph. How could u only be turning 26" pith 5000 r's with 700+ hp?? Maybe your turning a higher pitch prop?? Are u using gps to measure speed? I turn 26 bravos @ 5500 for 78mph w/625's. Also, my boat ran 72 max with 525sc's b4 I repowered.

Re: What Kind of Top Speed can I expect?

Sorry...re-read your post, 1:36 gear ratio...that explains the speed....

Re: What Kind of Top Speed can I expect?

how do you like the boxs? Speed gain? Do you have any before and after comparison #'s with the same power, or did you add boxa at same time you re-powered??

Re: What Kind of Top Speed can I expect?

Quote:

Originally Posted by SHAGNASTY

Dyno'd @ 720HP with 6.5 lbs of boost.

@ what rpm?