If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Follow us on Facebook Follow us on Twitter
Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1

    Thumbs up Sunsation Aggressor 25 tops 90

    Sorry - I've posted this same thing in a couple different areas of the Board - I know some only read certain sections.

    First and foremost, a big thanks to all those who provided feedback after the first (dismal) water test. And a big thanks to Bruce – he ‘da man!


    Boat: 2001 Sunsation Aggressor, 25’, 7’3” beam, 24 degree v-hull, delta pad. Guesstimate on the weight with ½ bag ‘o gas and 2-up is 4200#.

    Motor: Bruce Dudley 572 tall deck Merlin, N/A, 8.8:1 cr, 680hp @ 5400 rpms, 670 ft-lbs @ 4600 rpms - an 89 octane motor.

    Drive: (to be) IMCO SC, 1.34:1, std. length

    First water test (Sunday, April 28th):

    Done by Bruce. Flat water. Tried a 2” shortie Bravo o/d (1.50:1) with a 32P Bravo1. This hull has a known unhappy spot in the low 80’s. This was encountered at around 4600 rpms. Bruce was able to pull to 5100 rpms (with plenty of motor left), but the chine walk was wicked and did not significantly decrease after the low 80’s, as I understood it would. Bruce described the handling as such (the best I can recall): “Up to 75 mph, felt good. Near 80 mph it felt like the whole boat was out of the water, the ass-end was kicking to the side, then settling and catching, creating a viscous chine walk oscillation that didn’t improve significantly when trying to power through it. Extremely unsafe handling.”

    2nd water test (Thursday, May 2nd):

    Again, flat water. Temps only in the 50’s (you go Bruce!). Changed to a standard length Bravo with 1.36:1 ratio. Ran 3 different props: 27 Hydro Q-IV, 28 Bravo1, 29 Mirage+. Speed (GPS) and rpm’s below:

    Prop rpms speed

    Hydro 3600 55
    Bravo1 3600 58
    Mirage+ 3600 53(?)

    Hydro 5500 91
    Bravo1 5500 88.5
    Mirage+ 5500 90

    Overall, Bruce thought the boat felt best with the Hydro (which is what Sunsation had told us – we had a hard time believing this after the first test with the Bravo1 – if that prop was lifting the ass-end up, you would expect the Hydro to be even worse, right?). The high speed stability was much improved this time out. Can not say how much had to do with the lower x-dim and how much had to do with the fact that we were swinging smaller props at higher revs – my guess is they both had something to do with it - experience has tought me that there's usually a combination of 2 or more factors causing a "problem". Chine walking evident in the low 80’s, mild to moderate, but this time it decreased as speed increased. Only have tie-in hydraulic steering, but as many of you suggested, we will go all the way to the helm – should help “simplify” dealing with the bit of chine walk, minimizing steering over corrections.

    There are still a bunch of smaller items that Bruce is going to work on b4 I can get behind the wheel. I look forward to learning how to drive this thing at speed. I understand it will not happen in a day – I’ve got plenty of vacation time built up!

    A big thanks to Bruce – I couldn’t expect anything more – I’m truly impressed, and doing business with him has been excellent. Bruce is out of the St. Louis area. How did I find out about him? From the OSO Board! His e-mail address is [email protected] - he’s also the moderator of the OSO Technical Q&A area, though I don’t think he’s been on the Board for quite some time, since he’s been very busy. He can be reached at (314)-952-0861 (cell) or at (314)-731-3795. Just don’t bother him for another coupla weeks – I want my boat back!

    Another update to follow once I’ve had a bit of seat time. Hope this info has been of some use for others who may be in a similar situation. It's been a learning experience for me, and even for Bruce a bit I think.

    Elkton, MD, 21921
    [email protected]
    Last edited by kook; 05-02-2002 at 10:43 PM.

  2. #2
    Registered 26scarab's Avatar
    Join Date
    Mar 2001
    st. clair shores mi ,us
    Congrat's , 90 in a 25 boat

    You the man !

  3. #3


    Thats awsome to get that kinda speed out of your aggressor....they're one hell of a boat.... that thing must run like a raped ape! enjoy and good luck

  4. #4
    Actually the Aggressor is listed as 7'1" beam and 23'7" without swim platform

  5. #5
    Registered Shane's Avatar
    My Boats:
    2009 FORMULA 292
    Join Date
    Oct 2000
    Lake George, NY it's not called "Queen of American Lakes" for nothin'!

    Thumbs up

    Good for you! Best of luck! Be safe.


  6. #6
    Gold Member Gold Member Dave M's Avatar
    My Boats:
    2017 30 Concept, 300 Verados, Superboat Y2k and 24OS (sold)
    Join Date
    Oct 2000
    LaPlata, MD, USA
    I'm glad your project has worked out. Sound like a wild ride! Better bring some extra shorts!

    Dave M.

  7. #7
    Platinum Member Platinum Member
    My Boats:
    fuel injection, superchargers
    Join Date
    Jan 2001
    PA and MD
    So when does the boat come back to MD?

  8. #8
    Registered jbrauer's Avatar
    My Boats:
    2003 Spectre 36' Poker Run
    Join Date
    Sep 2001
    Nashville, TN
    Right on!! Good luck and be safe with the "new" rocket!

  9. #9
    Glad everything seems to be working out. Since it sounds like you are new to the kind of speeds your boat can go ... listen to the voice of experience and ALWAYS have your kill switch lanyard attached when you're driving the boat.

    Have fun ... safely

  10. #10

Page 1 of 2 12 LastLast

Similar Threads

  1. Baja outlaw vs sunsation aggressor
    By NVRENOUGH in forum General Boating Discussion
    Replies: 45
    Last Post: 02-21-2011, 09:12 PM
  2. Sunsation Aggressor Prop Recommendation
    By MattBMiller in forum Prop Talk
    Replies: 6
    Last Post: 05-10-2007, 09:57 AM
  3. Sunsation Aggressor (25') for sale
    By kook in forum Checkmate
    Replies: 2
    Last Post: 07-22-2002, 09:48 AM
  4. Sunsation Aggressor (25') for sale
    By kook in forum Powerquest
    Replies: 0
    Last Post: 07-20-2002, 07:44 AM
  5. 25' Sunsation Aggressor for sale
    By kook in forum Baja
    Replies: 0
    Last Post: 07-19-2002, 03:45 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
All times are GMT -5. The time now is 05:26 AM.
Powered by vBulletin® Version 4.2.0
Copyright © 2016 vBulletin Solutions, Inc. All rights reserved.
Search Engine Optimization by vBSEO 3.6.1
Original Poster In Postbit provided by Original Poster In Postbit v1.0.0 (Free) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2011 OffShoreOnly. All rights reserved.