Like Tree0Likes

Merc HP450 motor ?

Reply
Old 04-24-2003, 03:19 PM
  #1
Registered
Thread Starter
Trade Score: (1)
 
HiPerf2000's Avatar
 
Join Date: Oct 2000
Location: N.E.
My Boats: Sonic
Posts: 4,072
Default Merc HP450 motor ?

Does anyone know any iformation about the HP450's. I think they are pre 1997. I was told that they were the merc motors before the HP500's came out, and were dressed in blue as the 500's are.

What are these motors exactly, and what did merc do for the extra 50hp?
HiPerf2000 is offline  
Reply With Quote
Old 04-24-2003, 03:34 PM
  #2
Registered
 
Join Date: Jan 2001
Location: ST. Louis, MO, USA
Posts: 1,658
Default

HP450 was a 454 block with a roller cam. Didn't seem to be very sucessful.
Gary
Gary Anderson is offline  
Reply With Quote
Old 04-24-2003, 03:41 PM
  #3
Registered
 
later's Avatar
 
Join Date: Oct 2000
Location: Chesterfield Mo/Loto
My Boats: 98 42 fountain twin 500's
Posts: 1,355
Default

like Gary said HP450 was basicly a HP500 with 454inchs same intake and exhaust with a hydralic rollercam, most people either opted for the 500hp or for alot less money the 502 mag which was rated at 420 at the time
later
later is offline  
Reply With Quote
Old 04-24-2003, 04:06 PM
  #4
Registered
 
PatriYacht's Avatar
 
Join Date: Jul 2002
Location: Waterford,MI
My Boats: 94 43SC Black Thunder
Posts: 2,860
Default

It was very similar to the 454-420hp of the mid 80's but with a roller cam and Gil manifolds.
PatriYacht is offline  
Reply With Quote
Old 04-24-2003, 04:58 PM
  #5
Registered
Trade Score: (1)
 
Sonic Steve's Avatar
 
Join Date: Nov 2002
Location: Ingleside, Northern Illinois
My Boats: 37 Outerlimits
Posts: 299
Default

The 450 HP was introduced in 1994 about the same time as the 465 HP which was based on the 502 block. Both motors were hand built by Mercury's high performance division prior to the 500 HP. The 450 actually produced 460 horsepower on the dyno and is identical to the 500 HP except for the 454 block.

I ran a pair of these motors in a 31 Sonic and was really happy with the performance and reliability.
Sonic Steve is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
copiercat
Wanted
4
08-16-2008 02:54 PM
buck183
General Q & A
5
05-17-2004 11:37 AM
Goboat
General Q & A
3
01-23-2003 10:05 PM
East Coast B
General Boating Discussion
0
04-22-2002 09:03 AM
East Coast B
General Q & A
0
04-11-2002 08:53 PM



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 02:24 AM.


Copyright 2011 OffShoreOnly. All rights reserved.