how much can you bore out a 5.9 cummins

[khenrichs]

I know I will have to sonic check the block, just seeing how big guys have gone

 

[Chris Mallett]

Why? Do you need to clean up scratches or are you trying to bore for displacement?

 

[khenrichs]

Well both this will be for a tractor puller and the class limit in 380ci

 

[Chris Mallett]

I think it is better to search this one out, I believe though size is not an issue with the 5.9, it is durability. Too large of bore may reduce the strength.

 

[DEZLFREK]

I think it is better to search this one out, I believe though size is not an issue with the 5.9, it is durability. Too large of bore may reduce the strength.

x2
even with filling the block the cylinder wall thickness will become the weakest link..

 

[Highfinance97]

I was always told no more than 40 over