GTX2860R makes 313.3whp on 93 octane :)

[Jason@dizzytuning]

I had the pleasure of tuning a local’s Fiesta ST this past week. This 2017 is fitted with a GTX2860R turbo and almost all CP-E hard parts, including intake, fmic and piping, catback exhaust and motor mounts. The build was topped off with a pumaspeed tubular manifold and a Stratified Xtra fuel kit with a single 90 lb/hr injector!

Unfortunately, the temps were at bit high in the shop (78*), coupled with the customer’s request to run only 93 octane, we were a bit limited due to detonation creeping up. But we were still able to get a nice solid tune dialed in. This turbo really comes alive at 4,000 RPM, and is easily capable of 380+whp with a splash of E85!

Congrats on the build Chris, and I hope you are enjoying this little pocket rocket!

Final numbers: 297.1tq/313.3hp

 

[CB022481]

well, someone just went from 6 to 12 oclock...

 

[Sakel]

I'd love to have this setup, but traction must be terrible.

 

[Xaendeau]

I'd love to have this setup, but traction must be terrible.

Why would it?

My turbo kicks in at 3.6k @ 300 ft*lbs. I have perfect traction with good tires. This one is a little about less torque at a higher RPM so it will be fine. A little rough for autocrossing, but perfect for track days and highways.

 

[Truth in Ruin]

Hey Chris, let Jason tune it with corn juice

 

[KickerST]

Damn Nice!

 

[Sakel]

Why would it?

My turbo kicks in at 3.6k @ 300 ft*lbs. I have perfect traction with good tires. This one is a little about less torque at a higher RPM so it will be fine. A little rough for autocrossing, but perfect for track days and highways.

I just have a stage 1 setup, and second is very limited as it stands. I can see the higher rpm helping though.

 

[Xaendeau]

I just have a stage 1 setup, and second is very limited as it stands. I can see the higher rpm helping though.

What tires are you running?

 

[Sakel]

Stock potenzas.

 

[Xaendeau]

Stock potenzas.

Eh, that is about what is expected. Realistically you need to run Max Performance Summer tires, they can get decent tread life and still grip (~300 treadwear). Ideally, Extreme Performance Summer tires work better. These are softer compound street tires people like to use in autocrossing (exactly 200 treadwear).

In 215/45R17, you have: Pilot Sport 4 S on the high end, Potenza S-04 Pole Position in the mid range, and HTR Z III on the cheaper end of things. All are sort of necessary to get traction in 2nd gear, this is a normal FWD thing. Focus ST has more issues, being ~370 ft*lbs tq around 2.5k still with the stock turbo. Mazdaspeed3 had more issues like the Focus ST as well on the stock turbo.

The Fiesta ST has a significantly easier time getting traction with <300 ft*lbs tq even on small turbo upgrades, smaller engine. Being 2600 lbs minus the spare/jack helps too.

 

[felopr]

I just have a stage 1 setup, and second is very limited as it stands. I can see the higher rpm helping though.

you must have shitty tires or very high psi on the tires

 

[felopr]

I had the pleasure of tuning a local’s Fiesta ST this past week. This 2017 is fitted with a GTX2860R turbo and almost all CP-E hard parts, including intake, fmic and piping, catback exhaust and motor mounts. The build was topped off with a pumaspeed tubular manifold and a Stratified Xtra fuel kit with a single 90 lb/hr injector!

Unfortunately, the temps were at bit high in the shop (78*), coupled with the customer’s request to run only 93 octane, we were a bit limited due to detonation creeping up. But we were still able to get a nice solid tune dialed in. This turbo really comes alive at 4,000 RPM, and is easily capable of 380+whp with a splash of E85!

Congrats on the build Chris, and I hope you are enjoying this little pocket rocket!

Final numbers: 297.1tq/313.3hp

GJ Jason
now about that wastegate testing..