Like Tree0Likes

Top Speed In General

Reply
Old 05-06-2008, 10:33 AM
  #1
Registered
Thread Starter
 
Join Date: Feb 2008
Posts: 140
Default Top Speed In General

In general what should the top speed of a 21ft V-hull boat with a stock 365hp 454cu Bravo I outdrive and trim tabs be? I understand it depends on weight in the boat, of the boat, water conditions, hull design, etc. Just looking for a range.
Thanks.
CenturyUltra is offline  
Reply With Quote
Old 05-06-2008, 11:05 AM
  #2
Registered
 
ENFORCER24's Avatar
 
Join Date: Aug 2006
Location: Colonial Beach VA
My Boats: 1988 251 convincor with a BBF , yea a 460 ford !!
Posts: 630
Default

From 50 to 80mph , but very dependent on what kinda boat , could even be faster then that , but your not giving us much to work with here
ENFORCER24 is offline  
Reply With Quote
Old 05-06-2008, 11:13 AM
  #3
Registered
 
Join Date: May 2007
Posts: 789
Default

Advertised top speed of a Pachanga 22(20'6") with 330 HP was 66 in 1987. Had an alpha drive so that helped a little.
pachanga is offline  
Reply With Quote
Old 05-06-2008, 11:52 AM
  #4
Gold Member
Gold Member
 
Dave M's Avatar
 
Join Date: Oct 2000
Location: LaPlata, MD, USA
My Boats: 2017 30 Concept, 300 Verados
Posts: 5,220
Default

A '21 Superboat will run around 80 MPH with 365HP.
Dave M is offline  
Reply With Quote
Old 05-06-2008, 12:58 PM
  #5
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
My Boats: .......32............. ...............Active Thunder....
Posts: 15,741
Default

65-75 is most likely
Griff is offline  
Reply With Quote
Old 05-06-2008, 02:39 PM
  #6
Platinum Member
Platinum Member
 
jbraun2828's Avatar
 
Join Date: Oct 2007
Location: Grand Haven, MI
My Boats: 39 Lip-Ship Top Gun
Posts: 1,171
Default

Ran 68 in that exact setup with a 22ft Checkmate
jbraun2828 is offline  
Reply With Quote
Old 05-06-2008, 03:10 PM
  #7
Registered
Thread Starter
 
Join Date: Feb 2008
Posts: 140
Default

Its a Century Ultra, considered 23' but that is with the swim platform, I think its more like 21'.
CenturyUltra is offline  
Reply With Quote
Old 05-06-2008, 03:24 PM
  #8
Registered
 
Gladhe8er's Avatar
 
Join Date: Jan 2006
Location: Fairfield, CT
My Boats: 2005 Active Thunder 28
Posts: 3,693
Default

1996 22' Scarab(20' w/out platform) ran about 62-64 with 330 HP/Bravo. Probably would have seen 67-68 with 365 HP.
Gladhe8er is offline  
Reply With Quote
Old 05-06-2008, 03:41 PM
  #9
Registered
 
Join Date: Jun 2005
Location: Hendersonville, TN
My Boats: Between boats
Posts: 726
Default

87 wellcraft 23' nova-tall heavy boat- 330horse/bravo 55mph
This shows how weight effects mph
Tow-N-One is offline  
Reply With Quote
Old 05-06-2008, 06:45 PM
  #10
VIP Member
VIP Member
 
PARADOX's Avatar
 
Join Date: Dec 2005
Location: Florida
My Boats: Formula 272 Sold, 26 Infinity, 4 sale, 08-33' Avanti 4SALE
Posts: 2,697
Default

26 Infinity (25' with out the plat form) 454 Mag 350 HP Bravo 1 Mirage prop. 1" above std "X" dim 69.3 I gues a 21' -22' would go mid 70's. Mine is a relatively light boat for a 26'
PARADOX is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
KDAWG
Baja
4
07-23-2007 12:04 PM
TGOR
General Racing Discussion
3
03-29-2005 09:07 PM
Excalibur502mag
General Q & A
3
08-05-2004 03:39 PM
Nordicflame
General Q & A
16
03-06-2003 10:11 AM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 10:00 PM.


Copyright 2011 OffShoreOnly. All rights reserved.