Big Turbo questions

[BubbaG502]

Hey all,

new to the forum and mustang world but have been reading a lot. Just picked up a 2015 EB Coupe with 75k miles.

previous owner installed Flowmaster exhaust, BOV and air raid tube with K&N dropin

next steps for me:

CVF intercooler, charge pipes, down pipe and tune to try and get to that 320-330whp number.
But here comes my question, if I go bigger turbo, what all needs done to the car to prepare it? Like anything else beside what I’ve listed needs done?
Also, what HP can we reasonably go with these cars on the stock internals for reliability? Is 400 out of the question that would let the car still be reliable? Also looking to stay on pump gas.
Thanks in advance.

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[Coyote Chase]

Depends on which 400 HP your referring to... Crankshaft (yes) or Wheel (no). I like to track (calculated) crankshaft horsepower to evaluate modifications. With the stock turbocharger, basic bolt ons and Street Tune, I was able to hit 350 (+/-) CC HP on 93 octane pump gas. But with additional track tuning and ethanol, I hope to hit 375 CC HP. And even perhaps 400 CC HP with a new turbo. And that's about it... due somewhat to the 1st generation/pre 2020 connecting rods our motors are equipped with.

PS; This (opinion) is based on my experience and research. I'm no expert!

 

[TeeLew]

If you want to go to a bigger turbo, then you need to bite the bullet on a block. The problem is, if you're on a big turbo, then you can see north of 500 HP with port fueling plus the stock fuel system. At those loads, you gotta know an open deck is on the clock. If you keep it with lowish boost & power, the block might last, but the turbo is a little bit of a waste, because you aren't really using it.

At least that's been my logic so far.

 

[BubbaG502]

And that is swapping over to a 2.0 block?

I’m unfortunately going down a rabbit hole chasing thrill lol

 

[Coyote Chase]

If you want to go to a bigger turbo, then you need to bite the bullet on a block. The problem is, if you're on a big turbo, then you can see north of 500 HP with port fueling plus the stock fuel system. At those loads, you gotta know an open deck is on the clock. If you keep it with lowish boost & power, the block might last, but the turbo is a little bit of a waste, because you aren't really using it.

At least that's been my logic so far.

I agree!
But, if I had a spare motor, waiting for me at my shop... I'd like to push the pre-2020 long block to 425 or a post-2020 long block to maybe even 500 crankcase horsepower. But, only if I have a spare motor, which I don't, but I'm saving my pennies and looking...!?

 

[Duston@Lethal]

Chase his the nail on the head. That being said a bigger turbo can be safe on the stock block with a responsible tune. A bigger turbo won't generate massive torque down low, can move more air at lower temperatures with less effort and leave plenty on the table for when you are ready to build the motor.

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