Go Back  Offshoreonly.com > General Discussion > General Boating Discussion
What makes an HP525 an HP525? >

What makes an HP525 an HP525?

Notices

What makes an HP525 an HP525?

Thread Tools
 
Old 06-20-2008, 09:23 PM
  #1  
Registered
Thread Starter
 
Join Date: Sep 2007
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts
Default What makes an HP525 an HP525?

OK,

An HP525 has 525hp right? Well, how does it get the extra 100hp over a 496 HO? I don't think it's supercharged. So how does it make the extra power? Cam? Heads? Intake?
bimmerboy318 is offline  
Old 06-20-2008, 09:55 PM
  #2  
Driver-441
Racer
 
TeamSaris's Avatar
 
Join Date: Aug 2004
Location: Lake George
Posts: 11,889
Received 1,182 Likes on 321 Posts
Default

More cubic inches,better heads,lumpier cam,better intake and a better fuel map.
TeamSaris is offline  
Old 06-20-2008, 10:06 PM
  #3  
Registered
 
outriggers's Avatar
 
Join Date: Nov 2003
Location: Clinton N.J.
Posts: 946
Likes: 0
Received 1 Like on 1 Post
Default

From some of the dyno posts I've seen most make more than 525HP. Doug
outriggers is offline  
Old 06-20-2008, 10:14 PM
  #4  
Platinum Member
Platinum Member
 
jeff32's Avatar
 
Join Date: Jun 2004
Location: St-Hyacinthe, quebec, canada
Posts: 7,943
Received 462 Likes on 306 Posts
Default

Originally Posted by outriggers
From some of the dyno posts I've seen most make more than 525HP. Doug
really?
jeff32 is offline  
Old 06-21-2008, 12:00 AM
  #5  
Registered
 
Whipple Charged's Avatar
 
Join Date: Oct 2000
Location: Fresno, CA, 93722, USA
Posts: 1,436
Likes: 0
Received 5 Likes on 5 Posts
Default

Originally Posted by jeff32
really?
525hp EFI's make 525hp+ SAE all day long. They make 550hp corrected on almost everybody's dyno's.

The 496 engine is GM's new generation block, and is a very cheap motor, very close to auto OEM in every sense. The 525hp efi is a hand built older style GM engine. Has better internals (crank, rods, pistons, valves, push rods, springs....), far better flowing heads, much bigger camshaft, better exhaust, etc.

The computer is not "better", it's actually identical and the maps are done for their engines volumetric efficiency. Both have very good maps, slightly conservative, but very nice maps.

Thanks,
Dustin
Whipple Charged is offline  
Old 06-21-2008, 09:12 AM
  #6  
Registered
 
Join Date: Aug 2006
Location: Dallas Ga
Posts: 1,126
Likes: 0
Received 0 Likes on 0 Posts
Default

dustin are you programming the 525 ecu yet a little more rpm would be nice and a better map if possible
johnlomant is offline  
Old 06-21-2008, 10:20 AM
  #7  
Registered
 
Join Date: Nov 2003
Location: Lake Travis ,Texas
Posts: 2,295
Likes: 0
Received 2 Likes on 2 Posts
Default

525 is based on the 502 not the 496.
496vortec and 502 share almost nothing. two completely different beasts.
HTRDLNCN is offline  
Old 06-21-2008, 10:21 AM
  #8  
Registered
 
Join Date: Dec 2004
Location: Turku, Finland
Posts: 1,827
Received 2 Likes on 2 Posts
Default

Originally Posted by outriggers
From some of the dyno posts I've seen most make more than 525HP. Doug
On the Crank or on the Prop, now I believe Merc lists them at the prop ?
MikeyFIN is offline  
Old 06-21-2008, 01:49 PM
  #9  
Registered
 
Join Date: Jun 2006
Posts: 2,067
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by johnlomant
dustin are you programming the 525 ecu yet a little more rpm would be nice and a better map if possible
yes he is !
stainless is offline  
Old 06-21-2008, 03:42 PM
  #10  
Registered
Thread Starter
 
Join Date: Sep 2007
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by fast fun 2
More cubic inches,better heads,lumpier cam,better intake and a better fuel map.
Cubic inches? I thought was still based on a 502?
bimmerboy318 is offline  


Quick Reply: What makes an HP525 an HP525?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.