Machine shop questions on 454 mag
01-04-2019, 05:39 AM
#21
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Can you post a picture of one of the pistons ? Maybe top and bottom ?
01-04-2019, 05:43 AM
#22
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Were the factory pistons forged?
01-04-2019, 08:13 AM
#23
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I will get pictures of the pistons tonight.
The manual is 1997 and listed both carbed and EFI info. The rotating assemblies are a mid to late 90s when new, both are going into gen VI blocks. If I recall correctly, the date on the piston boxes is late 1996. I am not sure if any of that makes any difference but in my mind the manual was correct for when all of my parts are from. I am going to look around some more online today and see if I can find any other merc specs that may be more current.
thanks for the help so far guys
The manual is 1997 and listed both carbed and EFI info. The rotating assemblies are a mid to late 90s when new, both are going into gen VI blocks. If I recall correctly, the date on the piston boxes is late 1996. I am not sure if any of that makes any difference but in my mind the manual was correct for when all of my parts are from. I am going to look around some more online today and see if I can find any other merc specs that may be more current.
thanks for the help so far guys
01-04-2019, 09:06 AM
#24
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Join Date: Apr 2013
Location: Lagrange ky
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my diamonds are all .008-.0085. i dont have any piston knock ever and no blowby. these are also probably a better forged material than mercruiser and require more room to grow. not sure if this helps at all just showing that you can open them up pretty good and its ok.
01-04-2019, 08:40 PM
#29
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That was actually back in 87-88ish if I recall correctly. I am fairly certain these are forged. The machine shop told me they were trw forged. Maybe we are all mistaken
