Go Back  Offshoreonly.com > Technical > General Q & A
How to get to 80 mph with a single screw >

How to get to 80 mph with a single screw

Notices

How to get to 80 mph with a single screw

Thread Tools
 
Old 03-01-2010 | 01:04 PM
  #21  
Thread Starter
Registered
 
Joined: Sep 2009
Posts: 38
Likes: 0
From: Lexington, KY
Default

Originally Posted by blue thunder
I have a couple 10 rib ~2.8" blower pulleys with the merc spline if you are shopping for some.
Id be interested in trying one out. Whats the price?
Kid Cumberland is offline  
Reply
Old 03-01-2010 | 04:08 PM
  #22  
Rookie's Avatar
Registered
20 Year Member
 
Joined: Jan 2003
Posts: 6,021
Likes: 1,522
From: Grand Rapids, MI
Default

Originally Posted by Kid Cumberland
Im surprised this didn't come up earlier. Yes it was 76mph on the GPS. Its a great running little boat. Im a pretty big fan of the 525SC but will give most of the credit to the hull design.
Here is a 27' Fountain for ya
http://www.youtube.com/watch?v=e_8c5tyH9VE
Rookie is offline  
Reply
Old 03-02-2010 | 01:54 PM
  #23  
Registered
 
Joined: Nov 2005
Posts: 4,554
Likes: 3
From: Fredericksburg, Va
Default

lots of engine to go 98....
ezstriper is offline  
Reply
Old 03-02-2010 | 04:28 PM
  #24  
Rookie's Avatar
Registered
20 Year Member
 
Joined: Jan 2003
Posts: 6,021
Likes: 1,522
From: Grand Rapids, MI
Default

Originally Posted by ezstriper
lots of engine to go 98....
It's JimV's NA565, just a little under 800HP. Its the boat that he won all the LOTO shootouts with.
Rookie is offline  
Reply
Old 03-02-2010 | 05:46 PM
  #25  
Registered
20 Year Member
 
Joined: Jan 2004
Posts: 5,325
Likes: 112
From: Northern NY
Default

Had a pair of 525 SC's for 7 years and never did anything other than change oil and spark plugs. They spent their entire lives with Super Chillers and the boost upgrade pulley kits. These were bone stock 525's and made 600+ HP. Sold this rig some six years ago and from what I hear they're still running strong. Intercooling a supercharged engine is the best way to get more power, thru higher boost, without hurting the reliability. Check into the chillers and the pulley kit to get you to 7 - 7.5 lbs of boost, bolt it on and just smile!
RaggedEdge is offline  
Reply
Old 03-02-2010 | 05:48 PM
  #26  
Registered
 
Joined: Jun 2006
Posts: 14,914
Likes: 1
From: Lake Conroe, TX.
Default

That was the beauty of the 525. It had so little comp to start with that you really could boost it up pretty good.

My guess would have been to upgrade the exhaust to a tube header and then get the prop done by BBLADES.

Prolly pick up way more than 4mph.
jeff1000man is offline  
Reply
Old 03-02-2010 | 06:23 PM
  #27  
Registered
 
Joined: Dec 2005
Posts: 56
Likes: 0
Default

Originally Posted by Kid Cumberland
Id be interested in trying one out. Whats the price?
Be careful of just adding the smaller pulley without lowering the timing down to 30 or 32. I also sent my carb. out to Nickerson for a rebuild as the engine was very lean before the rebuild after adding the pulley. Last idea may be to go to big tube headers from CMI or Lightning.
OUTLAW24 is offline  
Reply
Old 03-02-2010 | 06:35 PM
  #28  
Registered
 
Joined: Jun 2006
Posts: 14,914
Likes: 1
From: Lake Conroe, TX.
Default

What was the stock overall timing for a 525 sc, and what was the stock boost setting with the factory GIL exhaust?
jeff1000man is offline  
Reply
Old 03-02-2010 | 07:48 PM
  #29  
Registered
15 Year Member
 
Joined: Oct 2005
Posts: 1,899
Likes: 20
From: Millstadt, IL
Default

What is your drive height? Fountains were usually set up correctly but I would check that first.
jeffswav is offline  
Reply
Old 03-02-2010 | 08:01 PM
  #30  
Registered
 
Joined: Dec 2005
Posts: 56
Likes: 0
Default

Originally Posted by jeff1000man
What was the stock overall timing for a 525 sc, and what was the stock boost setting with the factory GIL exhaust?
35 degrees....and 3 -5 psi....after adding the pulley it was around 7-8 psi
OUTLAW24 is offline  
Reply


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

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.