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Assistance ID'ing a cam...?

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Old 11-03-2010, 01:13 PM
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Default Assistance ID'ing a cam...?

Good morning, we are right in the middle of a rebuild on my 1996 Mercruiser 454 Mag MPI and having some trouble identifying the cam.

The number on the end of the cam is 16226137

We believe the cam to be the original factory cam but measuring it does not marry up to the listed Mercruiser specs...?

Any ideas? Thank you.

PS. What my builder has measured is this:

Lobe seperation 115
duration @ 6000 tapet lift 286
duration @ 5000 225 int/exh
lobe lift 283

What should the intake center line be?

I am a moron when it comes to this type of thing and just relaying info to my builder so I hope this makes sense.....
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Old 11-03-2010, 02:45 PM
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Is it a flat tappet or rolller cam????
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Old 11-03-2010, 03:30 PM
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Quote:
Originally Posted by Griff View Post
Is it a flat tappet or rolller cam????
Sorry, roller...

We "think" we have figured out what it is but double checking, I have to send my ECM away to get re-programed so I want to make sure I give them the correct info.....does this sound right?

Part #16226137 Melling

224 @.05 lifter rise
284 lobe lift
483 valve lift
115 1/2 lobe seperation

making 111 center line?
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Old 11-03-2010, 04:40 PM
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The specs are correct for a 454/502mag mpi cam. The GM part# is 12551622.

The only other numbers I have are 109 ATDC(intake) and 122 BTDC(exhaust). These are out of Dennis Moore's BBC book.
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Old 11-03-2010, 04:46 PM
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Quote:
Originally Posted by Griff View Post
The specs are correct for a 454/502mag mpi cam. The GM part# is 12551622.

The only other numbers I have are 109 ATDC(intake) and 122 BTDC(exhaust). These are out of Dennis Moore's BBC book.
Thank you sir, I appreciate the info, I can now "safely" send my ECM with the info to Mr.Boos.....
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Old 11-03-2010, 06:00 PM
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Why do you need the recal on the ecm since its a stock cam???? Did you do other mods????
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Old 11-03-2010, 06:17 PM
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Why do you need the recal on the ecm since its a stock cam???? Did you do other mods????
Pro-charger......
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