2015 race red ST

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#1
Hey everyone. I'm new to this forum and just bought a used 2015 Fiesta ST. I'm certainly not new to the EcoBoost platform and have a 17 Mustang that is getting a built engine and big turbo. Should be making around 500HP on E85. The Fiesta is going to be my daily so I don't plan on making built engine power. I'd say 250-300HP is where I see the car at when its done. This Fiesta had some things the previous owner already did to it but I might change up a few things. The exhaust is on the quieter side and I've been looking at doing a GESI catted DP. I might also switch the current exhaust for an MBRP. Ill use this thread to document my build. I dont think I'm going to make it as crazy a build as the Mustang is. It will mostly be for street use and the occasional track day and some weekend tail of the Dragon trips. 1669666551254.png 1669666573099.png
 


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Thread Starter #3
My previous car was a Honda CR-Z with a 6spd manual. It was about as built as I was gonna make it for daily street use. It was a 1.5L 4 cyl with a Sprintex Twin Screw SC. Sadly I had a wreck the other week and the car was a total loss. Parts are pretty hard to find for the car since it is discontinued and wasn't a very popular car. I had it about a 1" drop on BC coilovers with pillowball mounts. Front brakes were upgraded to some Wilwood brakes. I had done an LSD from Mfactory in the car. I will miss the car but I've heard some really good things about the Fiesta ST platform.
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Thread Starter #6
This is my Mustang. Its getting a built 2.3 engine with an NX2 turbo. I managed to put 2 holes in the stock block pushing 28psi boost. Its pretty much gonna be ready to go full send once the engine gets installed and I do a full breakin on the engine. My goal is low 400's on 93 pump and abour 520 on E85 HP wise.

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M-Sport fan

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#7
This is my Mustang. Its getting a built 2.3 engine with an NX2 turbo. I managed to put 2 holes in the stock block pushing 28psi boost. Its pretty much gonna be ready to go full send once the engine gets installed and I do a full breakin on the engine. My goal is low 400's on 93 pump and abour 520 on E85 HP wise.

View attachment 52799
Is it a manual, or a slushbox?

My son has an EcoBoost stang the same color, but he opted for the auto
 


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Thread Starter #8
Is it a manual, or a slushbox?

My son has an EcoBoost stang the same color, but he opted for the auto
Its a 6spd auto. I didn't know how to drive manual at the time when I bought the car and the 6spd auto is bulletproof for doing big turbo on the EcoBoost. I've heard horror stories about people turning their MT82 manuals into a bag of rocks after 2-3 hard shifts. the manual on the Fiesta should hold up to the power goals i have.
 


M-Sport fan

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#9
Its a 6spd auto. I didn't know how to drive manual at the time when I bought the car and the 6spd auto is bulletproof for doing big turbo on the EcoBoost. I've heard horror stories about people turning their MT82 manuals into a bag of rocks after 2-3 hard shifts. the manual on the Fiesta should hold up to the power goals i have.
Ha! Same with my son, and I told him the same exact thing you just said about the auto, even though he will never mod it to the point that you are. [wink] [thumb]
 


FiestaSTdude

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#10
Welcome to the forum! I’m looking forward to following your build!
 


XR650R

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#11
Its a 6spd auto. I didn't know how to drive manual at the time when I bought the car and the 6spd auto is bulletproof for doing big turbo on the EcoBoost. I've heard horror stories about people turning their MT82 manuals into a bag of rocks after 2-3 hard shifts. the manual on the Fiesta should hold up to the power goals i have.
This tranny is used in a ton of other Fords that are bigger and have more power. The shape of it is different in the Fiesta so it will fit, but it's strong.
Put 2 liters of Ravenol MTF-2 in it right away. https://www.ravenolamerica.com/passenger-car-products/75w-80-gear-oil-ravenol-mtf-2/
 


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