I've read: "With only 6 to 8 pounds of boost pressure, a turbo can increase power output 15 to 25 percent or more over a naturally aspirated engine." I expect that this is all the boost pressure the wastegate in this system is designed for. If so this puts the boost from the turbo at somewhere between 45 & 75 HP. Given that the turbo was put in this car to reduce emissions I'm guessing closer to 50 HP. That puts the normally aspirated high revving 4 banger at somewhere in the 250 HP range. That's plenty of power for this little car. While the turbo is fun I'd rather increase the mileage by 15 to 20%. Eliminating or minimizing the boost from the turbo should accomplish this.
Well lets see if I can unpack this for you. The 2.3 Mustang Ecoboost motor makes 17-20 PSI of boost STOCK. So all of your following assumptions are incorrect.
It would also reduce under hood temps which is desirable from a durability standpoint. After driving the car only a few times the heat build up under the hood is disturbing. I've decided to open the hood when I get the car home to allow the heat to escape. I want to open the hood in public as well but I can't afford the potential for missing parts every time I return to the car at the grocery store.
The turbo does not create that much extra heat when it's not making boost. So again, if you keep your foot out of it it won't run that much hotter than an N/A car. Aside from all this.... that's what the cars cooling system is designed for.
I'd be surprised if bypassing the turbo would cause the ECM/software problems. I've see non-aspirated cars with turbo kits installed without requiring mods to the ECM. Lots of these mods end up with a performance chip enhancement but not because it's necessary. The chips are added to add a little more HP.
I never said bypassing the turbo would cause ECM/software problems. The ECM however will be very confused when all of its A/F table data suddenly doesn't match what is expected and it will make drastic changes to compensate. Your last three sentences show exactly how much you don't know about tuning and forced induction.
So please, go ahead and bypass that turbo and then record the results and post it here so you can show me how wrong I am on all this. I'd love to see it! While you're at it dump those direct injectors for a carb and regular intake.
U.M.