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Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Boating Discussion (https://www.offshoreonly.com/forums/general-boating-discussion-51/)
-   -   New Engines: 557 or 572 (https://www.offshoreonly.com/forums/general-boating-discussion/142981-new-engines-557-572-a.html)

mikes280 10-17-2006 09:39 PM
Re: New Engines: 557 or 572
 
the cometic and the new fel-pro are great and for me they have just about done away with headgasket problems

JCPERF 10-17-2006 09:40 PM
Re: New Engines: 557 or 572
 
Originally Posted by 42MTI
I heard that the cometic gaskets have eliminated most head gasket issues.
What RPM's are most builders comfortable with on a 4.5 stroke 1000+ hp motor. For sustained length runs.
6300 to 6500 with real roller lifters

mikes280 10-17-2006 09:41 PM
Re: New Engines: 557 or 572
 
Originally Posted by JCPERF
6300 to 6500 with real roller lifters
solid :evilb:

JCPERF 10-17-2006 09:42 PM
Re: New Engines: 557 or 572
 
Originally Posted by mikes280
solid :evilb:
904 or bigger

mikes280 10-17-2006 09:43 PM
Re: New Engines: 557 or 572
 
Originally Posted by JCPERF
904 or bigger
yep :D

GPM 10-17-2006 09:43 PM
Re: New Engines: 557 or 572
 
Originally Posted by mikes280
the cometic and the new fel-pro are great and for me they have just about done away with headgasket problems
I must be doing something wrong, head gaskets have been a nightmare for me.

mikes280 10-17-2006 09:46 PM
Re: New Engines: 557 or 572
 
Originally Posted by GPM
I must be doing something wrong, head gaskets have been a nightmare for me.
studs or bolts also head gasket problems can be the result of other problems, tune or weak deck or weak head

Sean H 10-17-2006 09:49 PM
Re: New Engines: 557 or 572
 
Originally Posted by 3600cat
Out of one of my 598's.Just a small leak in a header is a real bad thing. :D
i think i saw a block that matched those in your shop... :drink: :evilb:

GPM 10-17-2006 09:53 PM
Re: New Engines: 557 or 572
 
Originally Posted by mikes280
studs or bolts also head gasket problems can be the result of other problems, tune or weak deck or weak head
Big M, ARP pro studs, Big Duke heads, dark plugs,

mikes280 10-17-2006 09:59 PM
Re: New Engines: 557 or 572
 
Originally Posted by GPM
Big M, ARP pro studs, Big Duke heads, dark plugs,
what kind of headgaskets and how much timing


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