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-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   575 SCI rebuild (https://www.offshoreonly.com/forums/general-q/362753-575-sci-rebuild.html)

kjm5125 10-06-2019 08:14 AM
Starting to get into the details, complete rebuild this winter.

Thanks for all the insight.

JRider 10-14-2019 12:48 PM
Originally Posted by sutphen 30 (Post 4705009)
change the heads and cam,lower the compression a bit.
@ 7.5 to 1 you must mean raise compression...

Kaddo101 10-16-2019 10:04 AM
Originally Posted by 1 MAIDEN AMERICA (Post 4705498)
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.

1 MAIDEN AMERICA 10-17-2019 01:11 AM
Originally Posted by Kaddo101 (Post 4710982)
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.

F-2 Speedy 10-17-2019 07:05 AM
Id do the EFI Whipples if its in the budget should fit under the hatch with no mods. I did this this last winter

kjm5125 10-17-2019 08:33 PM
Originally Posted by F-2 Speedy (Post 4711170)
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 04-12-2020 09:28 AM
Build in process, hopefully done by May 1.

hogie roll 04-12-2020 10:26 AM
Originally Posted by kjm5125 (Post 4733332)
Build in process, hopefully done by May 1.
What combo did you go with?

kjm5125 04-12-2020 11:15 AM
Dyer's 871 conversion kit, Eddie Young Fuel Delivery system, AFR heads

F-2 Speedy 04-12-2020 11:30 AM
Originally Posted by kjm5125 (Post 4711309)


What Whipple?
pair of 3.3 L


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