Boring 454 Mag-385 .220 over
04-01-2007, 07:09 PM
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Boring 454 Mag-385 .220 over
A 454 Mag 385 hp has all the steel internals of a 502 mag.
The diameter of the 454 is 1.250
The diameter of the 502 is 1.470
The difference is 0.220 (220 thousandths)
Can this be done? and then can you get your ECU reflashed and have a 502?
The diameter of the 454 is 1.250
The diameter of the 502 is 1.470
The difference is 0.220 (220 thousandths)
Can this be done? and then can you get your ECU reflashed and have a 502?
04-01-2007, 08:10 PM
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OOPS
Meant to say 4.250.
So I guess the article mentioned above says that it can be done.
Has anyone ever done this? Is it too much bore?
Would it be better to go the 496 route?
Meant to say 4.250.
So I guess the article mentioned above says that it can be done.
Has anyone ever done this? Is it too much bore?
Would it be better to go the 496 route?
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04-01-2007, 08:28 PM
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No you can't bore a 454 to ,make it a 502, not enough cylinder thickness . The 502 is a different block although the stroke is the same. Go to a 4 1/4 stroke and make it a 496.You can bore your 454 to a 60 over with no problems. John
Racer
