38 speeds
06-11-2010, 04:38 PM
#11
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no not 90 ! 91 GPs !
that's why I think drive ratio must be different to run 15 plus mph with only 2 pitch more...
anyway, does'nt matter! well... not that much!
that's why I think drive ratio must be different to run 15 plus mph with only 2 pitch more...
anyway, does'nt matter! well... not that much!
06-12-2010, 09:33 AM
#12
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Raf
06-12-2010, 10:42 AM
#13
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i agree! but still only spinning 30 !
even if you have 5 engines, if drive ratio is 1.5 and you spin 21's with 1000 hp each, if engines were made to run 5000 rpm, it is still gonna go at only 60 mph !!!
that's why I'm surprised of the speed differance for only 2 pitch above!!!
even if you have 5 engines, if drive ratio is 1.5 and you spin 21's with 1000 hp each, if engines were made to run 5000 rpm, it is still gonna go at only 60 mph !!!
that's why I'm surprised of the speed differance for only 2 pitch above!!!
06-12-2010, 11:41 AM
#14
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Hull design and X dimension play a bigger factor between the two boats. I think I kind of get what you are saying. I think you needed to expand on what you were saying.
RAF
RAF
06-13-2010, 07:47 AM
#16
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That boat with 525's should see low 80's with the right prop. I have A/C, gen set and ext boxes with 500's and had BBlades work my 28 Bravo's with a lab finish and some cupping to get the slip down and just saw 80 GPS for the first time the other day under perfect conditions. Most of the time I can get a solid 75 GPS though.
06-13-2010, 05:51 PM
#17
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That boat with 525's should see low 80's with the right prop. I have A/C, gen set and ext boxes with 500's and had BBlades work my 28 Bravo's with a lab finish and some cupping to get the slip down and just saw 80 GPS for the first time the other day under perfect conditions. Most of the time I can get a solid 75 GPS though.
06-13-2010, 08:19 PM
#18
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Very simple deal here! Owner/seller says 88 mph, just show up with cash and simply say to him "Show me the 88!"
Likely never going to happen with that combo. I don't think a 353 can run that number with 525's.
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