454 to 502
fuego2323
02-20-2009, 03:07 PM
hello anyone i have a 454 motor aand i would like to make it a 502 what i have to do it is expensive or to much trouble :banghead:
MrPbody
02-21-2009, 11:26 AM
fire...,
No, not in the "conventional" sense, can the 454 become a "502". The bore size for 454 is 4.250". 502 is 4.500". One cannot bore the block far enough without compromising the strength of the block. We never take a BBC more than .100" over. We've seen some of the HD ("tall deck") blocks bored .125" over (366 blocks).
There's another way to get there, though. Many aftermarket suppliers offer a "stroker" kit with a 4.25" stroke. Installing that in a .060" over block makes a 496. Bore it .080" over and it's a 500. Bore it .100 (final bore size 4.350") and it's a 505. Parts and rotating kits are readily available to do this. Don't scrimp on the price as quality and cost are directly related here.
I also advise the use of a competent machine shop to do alll the necessary work to make the kit "fit". With the right heads, cam and induction, these things are BEASTS!
Jim
No, not in the "conventional" sense, can the 454 become a "502". The bore size for 454 is 4.250". 502 is 4.500". One cannot bore the block far enough without compromising the strength of the block. We never take a BBC more than .100" over. We've seen some of the HD ("tall deck") blocks bored .125" over (366 blocks).
There's another way to get there, though. Many aftermarket suppliers offer a "stroker" kit with a 4.25" stroke. Installing that in a .060" over block makes a 496. Bore it .080" over and it's a 500. Bore it .100 (final bore size 4.350") and it's a 505. Parts and rotating kits are readily available to do this. Don't scrimp on the price as quality and cost are directly related here.
I also advise the use of a competent machine shop to do alll the necessary work to make the kit "fit". With the right heads, cam and induction, these things are BEASTS!
Jim
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