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PLEASE don't build a 4" stroker engine with a CAST crank.

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Scat or Eagle?

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From what I can see you have most of it already. Might as well spring for a forged crank. You know it's the right thing to do. Hmm aluminum heads, some compression, next thing you want to throw some NOS at it and wham! it's gone. Just do it once and be done with it.

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That's what I was hinting at. How many of our members over the years have snapped aftermarket CAST cranks. Get a good forged crank, internally balance it, install a set of after market H beem rods and the shortblock is ready for years of fun. You can always upgrade the heads as you have lots of growing room.

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From what I can see you have most of it already. Might as well spring for a forged crank. You know it's the right thing to do. Hmm aluminum heads, some compression, next thing you want to throw some NOS at it and wham! it's gone. Just do it once and be done with it.

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That's what I was hinting at. How many of our members over the years have snapped aftermarket CAST cranks. Get a good forged crank, internally balance it, install a set of after market H beem rods and the shortblock is ready for years of fun. You can always upgrade the heads as you have lots of growing room.

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From what I can see you have most of it already. Might as well spring for a forged crank. You know it's the right thing to do. Hmm aluminum heads, some compression, next thing you want to throw some NOS at it and wham! it's gone. Just do it once and be done with it.

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That's what I was hinting at. How many of our members over the years have snapped aftermarket CAST cranks. Get a good forged crank, internally balance it, install a set of after market H beem rods and the shortblock is ready for years of fun. You can always upgrade the heads as you have lots of growing room.

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I think if you do a search the ones that have "snapped" all have been Eagle cast cranks..have not seen one report of a Scat cast crank snapping...

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I said my piece. Its his engine so he can pick his parts as he wishes. Good-luck with your build.

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From what I can see you have most of it already. Might as well spring for a forged crank. You know it's the right thing to do. Hmm aluminum heads, some compression, next thing you want to throw some NOS at it and wham! it's gone. Just do it once and be done with it.

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That's what I was hinting at. How many of our members over the years have snapped aftermarket CAST cranks. Get a good forged crank, internally balance it, install a set of after market H beem rods and the shortblock is ready for years of fun. You can always upgrade the heads as you have lots of growing room.

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I think if you do a search the ones that have "snapped" all have been Eagle cast cranks..have not seen one report of a Scat cast crank snapping...

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I said my piece. Its his engine so he can pick his parts as he wishes. Good-luck with your build.

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Same thought here. Not saying its going to happen no matter what but plan for upgrading etc. I've had two engines built that I wish I'd just have done right the first time. No nothing broke but they weren't what I wanted and in the end the "shortcuts" I took in the shortblock wouldn't have survived what I plan to do with the 380 I bought. I think it's just trying to say hey learn from my mistakes.

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From what I can see you have most of it already. Might as well spring for a forged crank. You know it's the right thing to do. Hmm aluminum heads, some compression, next thing you want to throw some NOS at it and wham! it's gone. Just do it once and be done with it.

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That's what I was hinting at. How many of our members over the years have snapped aftermarket CAST cranks. Get a good forged crank, internally balance it, install a set of after market H beem rods and the shortblock is ready for years of fun. You can always upgrade the heads as you have lots of growing room.

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I think if you do a search the ones that have "snapped" all have been Eagle cast cranks..have not seen one report of a Scat cast crank snapping...

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I have the pieces of a Scat cast/MP cast 4" crank to prove they can be broken. It did last about 8yrs and 200-300 passes per year running mid 10's. Another that I built in 2003 is running around Texas and doing well. I don't have an issue with them for mild builds but a forged crank is always a good upgrade and if you want an internal balance build would be the better option. The Eagle cast crank is not even close and I wouldn't touch one,I did for a minute one time and quickly stuffed it back in the box to return it.