[Joshinator99]

Originally Posted by bishopts

In theory I'm increasing displacement by 25%, so horsepower should increase pretty much the same as long as the boost pressure stays consistent.
So 275hp to 346hp.

So there’s definitely more to that but understand your premise. Your turbo can’t magically produce 25% more airflow without getting outside its efficiency island so IATs can get out of hand if so. What usually happens in situations like this is the engine becomes more of a torque monster in the mid range and you make similar horsepower numbers up top.

Now I admittedly don’t know anything about the 4 cylinder turbo and its size so maybe there’s more headroom available than I know about. But it’s always fun to talk theory.