offthefront

iTrader: (1)

need these ....

http://www.offshoreonly.com/forums/s...rage-plus.html

smokin' gun

iTrader: (30)

something here dont seem right .did someone change the props on you ???. 630 hp and only turning them 4700 will hurt the motors in the long run .how was run like this as long as it has without anyone questioning it ????

i had a 89 357 trs drives 502s w imco exhaust clay smith cams stk intakes and 800 holleys 27 mirage props spinning 5100 + and i know i had no 630 h/p

offthefront

iTrader: (1)

I was thinking the same thing ..... my 311 was turning 28 B1's 52-5300 .... I could run the 27 or 29 Mirage but the 28 B1 worked the best ... 600HP ....

My question would be where did you get the 630HP Number?

sprink58

Diego,

According to the Prop Slip Calculator that's 15% slip...while not great isn't terrible either.

79formula

Is the 272 for sale?

Diego9040

iTrader: (1)

The 357 is my friend's boat and I am trying to help him, get it dialed in.
now my 272 ? hey everything has a price, it has been running great since I bought it(nov 2012 ) 64 mph all day, very reliable with stainless marine and long custom risers, ( ready for a big hp bump)

Now my friends 357 is going back to the shop tomorrow and we'll check a couple of things, I will post dyno sheets soon , engines were built by Fever Marine in Indiana, both seller and engines builder are really experienced boaters, we'll see how it develops. But I agree, it should be running a lot faster.

Inrecovery

iTrader: (1)

[ATTACH=CONFIG]513484[/ATTACH] In 2007 this boat had twin 555hp 509cu, steel head motors, aftermarket Hardin exhaust and Mallory ing. / stock bravo 1.5 drives and 24 pitch 4 blade lab props. with 100 gals and good chop boat ran 5100 rpms and was at 70 max out. At 630hp how much faster could this hull be pushed? 3-5 mph? Diego keep us posted on the numbers/stats

Diego9040

iTrader: (1)

We are not so much above from those hp #'s since in the dyno sheets these engines are producing around 580 hp at 5100 rpm ,(peak hp was at around 5600 rpm)next step is labbing the 24p bravo 1's, also we had a windy day and 6 month old fuel ( builder told us yesterday to use only 93 octane) . I have no doubt that we can get to 70mph with some adjustments and that would make sense compared to your numbers, thanks for your post.

Diego9040

iTrader: (1)

Have you tried mirages on the 357 ?

Diego9040

iTrader: (1)

DYNO2.pdfDYNO1.pdfDYNO2.pdfDYNO1.pdfSee the 2 attachments here showing Dyno sheets on one of the engines, it looks like at 5200 rpm we have 578HP and 583lb/Tq so 70mph should be the target with this set up.