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02-26-2008 | 11:39 AM

#11

littledcsrodshop

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Joined: Apr 2005

Posts: 2,197

Likes: 3

From: TN

My wife was egging me on, so I shut him up

Mike , can you let me know what school you sent her to for that one !

Mine loves to ride but when it comes to running hard we have to make a stop at the dock for a drop off...

02-26-2008 | 11:46 AM

#12

Pismo10

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Joined: Jan 2002

Posts: 2,053

Likes: 39

From: Further South East of Dome Island

So a stepped 28, with a single Merc 600SCi, ITS, good prop, could see 85. Nice setup. Would keep the stock XR Bravo too.

Last edited by Pismo10; 02-26-2008 at 11:49 AM.

02-26-2008 | 08:15 PM

#13

tomcei

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Joined: Feb 2005

Posts: 1,920

Likes: 151

From: Atlanta

First thing I thought of when I read Mikes post- My wife would have made me swear not to hammer it. She would have called for a ride home if she even suspected any horse'n around.

It took a long time before barking 2nd was cool !!

03-28-2008 | 12:34 PM

#14

27sedan

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Joined: May 2002

Posts: 117

Likes: 0

From: Buffalo

try this.
it was right on for my magnum
www.go-fast.com/boat_speed_predictions.htm

04-03-2008 | 09:52 AM

#15

joepaws

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Joined: Oct 2006

Posts: 387

Likes: 0

From: ft lauderdale

Quote:

Originally Posted by JO - PANTERABOATS

With a "full pleasure" set up:

Single 500 Carb. Merc. : 67 - 69 MPH
Single 500 EFI Merc. : 70 - 71 MPH
Single 525 EFI Merc. : 72 - 74 MPH
Single 650 HP : 78 - 82 MPH
Single 725 - 750 HP : 84 - 87 MPH

Twin 496 HO - 425 HP Mercs. 81 - 83 MPH
Twin 500 EFI Mercs. 91 - 93 MPH
Twin 525 EFI Mercs. 93 - 95 MPH

It all depends on water conditions, temperature, elevation, fuel and passenger load, labbed prop - stock prop , engine torque , and driver.

The newer 28s have been running a few mph faster than the older ones due mainly to the weight savings of new lamination.

Our new "twin stepped" bottom 28' should be atleast 12-14 % faster with equal HP. We will find out soon !!!

JO

i figured i throw in my 2 cents here. i took jo's racing props from his race boat over the weekend because mine got smashed by a forklift driver. anyway, with my s h i t t y driving skills and great water in sanibel i butsed the 91mph mark. just under 92mph when we stopped no one could believe the speed i was getting from stock 525 power and not even staggered. some dude in an outerlimits was pissed he couldnt get me.