So do you need to do it? I've been reading it both ways. Is it really necessary to change or should you just leave it at the factory value? How does it actually affect drivability if you change or don't change it? Thanks.

Ken R.

 

I would think that it would affect the Volumetric Efficiency tables. I would say yes it needs to be changed. I have had several custom tunes done for my 383 and all of them had changes mad for the increase in cubes. I'm not sure why you would not change it.