[quickass_vr4]

So here is the question, if I overbore my block .40 over what will that change the litre displacement to?
Will it then be 3.5 litre?
I am getting ready to overbore a block and fit it with titanium rods and forged pistons, and wanted to know what litreage this would produce.

 

[Jeff Lucius]

Well my 0.050" overbore changed displacement to 3.056 L. So figure 0.040" will be a less than that. To get 3.1 L, the overbore must be 0.075", as large as I have heard anybody boring our block. It is impossible to get 3.5 L displacement from our block without a change in stroke.