lol, same tune, same load targets, same lambda means it injects same fuel amount, where do you see more air?
power is better because of lower backpressure and better flow. I can only repeat that bigger turbo with the sane tune (it can be stock tune also) WILL make better power and same tune means engine will get SAME amount of air because load targets are same.
example : N55 ewg. stock turbo can easily max out hpfp. you set it on the hpfp limit ~1.15-1.2 bar at high rpms and get ~410hp max. PS2 same hpfp same boost same load and you get 450-460hp. It’s hard to believe that there are still some people not understanding these basics.
Quote:
Originally Posted by kern417
Flow is important but not the end all be all. If you look at the fuel trims of his log, you'll see that at times it was injecting over 20% more fuel than the tune demanded just to keep up with the additional airflow. If you are fuel limited, then all you'll do is crash the fuel pump, lean out, and potentially damage your engine. We're just lucky that our DME is advanced enough to protect itself from these scenarios, so you can dyno with the stock turbo tune for testing purposes.
So no, a bigger turbo with the same fuel supply won't make more power, because more air needs more fuel. If you are fuel limited, then you will not be able to make more power with a bigger turbo. In fact, you will need to run the larger turbo at a lower boost pressure. Please don't go blowing up your engine thinking otherwise.
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