Go Back  Offshoreonly.com > Technical > General Q & A
575 SCI rebuild >

575 SCI rebuild

Notices

575 SCI rebuild

Old 10-06-2019 | 08:14 AM
  #11  
Thread Starter
Registered
20 Year Member
 
Joined: Feb 2006
Posts: 793
Likes: 59
From: Sandusky/Olmsted Falls, OH
Default

Starting to get into the details, complete rebuild this winter.

Thanks for all the insight.
kjm5125 is offline  
Reply
Old 10-14-2019 | 12:48 PM
  #12  
Registered
15 Year Member
 
Joined: Jul 2007
Posts: 2,640
Likes: 14
From: MI
Default

Originally Posted by sutphen 30
change the heads and cam,lower the compression a bit.
@ 7.5 to 1 you must mean raise compression...
JRider is offline  
Reply
Old 10-16-2019 | 10:04 AM
  #13  
Registered
 
Joined: Aug 2015
Posts: 12
Likes: 0
Default

Originally Posted by 1 MAIDEN AMERICA
I went .030, cleaned head and deck, 525 roller cam(I think), Super Chiller w/slightly smaller pully, stock fuel system, stock MEFI
Cam I .610/298* E .632/306*
Press fit pins and cast iron heads
Stock oil cooler
703HP@5372 740TQ@4100
4# boost
92 octane
Ed Trihey @ Ed's Automotive assembled/dynod them
310 hours and still run the same based on top speed of boat hasn't lessened.
WOT oil pressure 38PSI@170F@5350RPM for 10 minutes+ freaked me out but 310 hours later I guess it works and it's easier on the distributor gear.
that oil pressure never scared you? Mines like that and I getting a HF/HV oil pump put in and a new 10 qt pan with a crank scrapper with a built in windage screen.
Kaddo101 is offline  
Reply
Old 10-17-2019 | 01:11 AM
  #14  
1 MAIDEN AMERICA's Avatar
Registered
15 Year Member
 
Joined: Aug 2006
Posts: 1,026
Likes: 16
From: Renton, Wa
Default

Originally Posted by Kaddo101
that oil pressure never scared you? Mines like that and I getting a HF/HV oil pump put in and a new 10 qt pan with a crank scrapper with a built in windage screen.
It freaked me out too. I put another gauge on, same thing. Pulled engine and checked pump, good. Ran a quart low and a quart over, same. 300 hours later, many of them at 5K+RPM, still the same. Hot oil after running WOT for an extended time and returning to idle, 32PSI. Both engines.
Kendall 20-50, Wix and/or Quicksilver filters, 160-170max oil temp w/stock cooler.
Water pressure is 12-18# on one engine and 16-22# on the other.
What kind of temps are created just by pumping oil at higher pressure? Not to mention heat created at the cam/dis gears from the extra work load.
Low pressures and temps, and high hours must mean good flow.
Hey, whatever works.
1 MAIDEN AMERICA is offline  
Reply
Old 10-17-2019 | 07:05 AM
  #15  
F-2 Speedy's Avatar
Platinum Member
Community Builder
10 Year Member
Platinum Member
 
Joined: May 2012
Posts: 11,427
Likes: 3,953
From: Midwest & T-Rock
Default

Id do the EFI Whipples if its in the budget should fit under the hatch with no mods. I did this this last winter
F-2 Speedy is offline  
Reply
Old 10-17-2019 | 08:33 PM
  #16  
Thread Starter
Registered
20 Year Member
 
Joined: Feb 2006
Posts: 793
Likes: 59
From: Sandusky/Olmsted Falls, OH
Default

Originally Posted by F-2 Speedy
Id do the EFI Whipples if its in the budget should fit under the hatch with no mods. I did this this last winter
What Whipple?
kjm5125 is offline  
Reply
Old 04-12-2020 | 09:28 AM
  #17  
Thread Starter
Registered
20 Year Member
 
Joined: Feb 2006
Posts: 793
Likes: 59
From: Sandusky/Olmsted Falls, OH
Default

Build in process, hopefully done by May 1.
kjm5125 is offline  
Reply
Old 04-12-2020 | 10:26 AM
  #18  
Registered
20 Year Member
 
Joined: Jan 2006
Posts: 3,861
Likes: 793
From: St. Pete Beach, FL
Default

Originally Posted by kjm5125
Build in process, hopefully done by May 1.
What combo did you go with?
hogie roll is offline  
Reply
Old 04-12-2020 | 11:15 AM
  #19  
Thread Starter
Registered
20 Year Member
 
Joined: Feb 2006
Posts: 793
Likes: 59
From: Sandusky/Olmsted Falls, OH
Default

Dyer's 871 conversion kit, Eddie Young Fuel Delivery system, AFR heads
kjm5125 is offline  
Reply
Old 04-12-2020 | 11:30 AM
  #20  
F-2 Speedy's Avatar
Platinum Member
Community Builder
10 Year Member
Platinum Member
 
Joined: May 2012
Posts: 11,427
Likes: 3,953
From: Midwest & T-Rock
Default

Originally Posted by kjm5125


What Whipple?
pair of 3.3 L
F-2 Speedy 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.