Hey guys working on my buddies 2008 Malibu VLX. Its equipped with a Indmar 383 "Hammerhead". The boat is raw water cooled and operated in salt water. Although it it religiously flushed after every use, the Salt and lack of Zincs has taken its toll on the Aluminum Cylinder heads it came equipped with and they are in need of total replacement after 704Hours of run time.
I know it vortec based GM 350 and is currently equipped with GM FASTBURN aluminum heads. I personally would like to replace the heads with a good set of iron heads as I think they will endure the salt a little better and I hate so see a great set of aluminums get destroyed.
I need to call indmar and determine the valve lift to ensure what ever replacements will have adequate spring travel as this is a full roller engine right now.
What are your opinions and what are my options in doing this?
How much Power will be lost? Enough to have to re-prop?
Wil
I know it vortec based GM 350 and is currently equipped with GM FASTBURN aluminum heads. I personally would like to replace the heads with a good set of iron heads as I think they will endure the salt a little better and I hate so see a great set of aluminums get destroyed.
I need to call indmar and determine the valve lift to ensure what ever replacements will have adequate spring travel as this is a full roller engine right now.
What are your opinions and what are my options in doing this?
How much Power will be lost? Enough to have to re-prop?
Wil