X57 365bhp Fiesta ST Eco boost Turbocharger - Fiesta ST180 Mk

X57 365bhp Capable Turbocharger - Fiesta ST180 - Puma speed Cast Turbochargers

• Direct bolt on turbocharger, no exchange required
• X57 unto 350bhp / 318whp on stock fuel system, 365bhp with updater
• Designed, cast and fully built in the UK and exclusive to Puma speed and their dealers
• 7 blade extended tip billet CBC compressor wheel with cut-back exhaust side blades for high flow
• Motor sport K04 heavy duty 360 degree thrust bearing pack assembly for increased lubrication and longevity
• Includes all required fittings to enable direct bolt on, complete package ready to go
• Take your Fiesta ST to the next level of power

 

To build the perfect turbocharger you must understand the desires of the customer and understand the dynamics of the engine itself.
The 1.6 Eco boost motor has no better home than Puma speed, with 20+ years experience, race engines being built every week to power levels of over 460bhp. You couldn't be in better hands.

The X57 series of turbochargers have been designed from the ground up with a no-compromise attitude. They feature the very latest spec genuine K04 / K16 Motor sport internals and state-of-the-art billet 7 blade extended tip CNC compressor wheels. The exhaust housing has even been manufactured from one of the most advanced materials, DB Ni resist, which is used on the bombproof Garrett turbo range, so these truly are high spec units. These turbos have been tested on road and track since late 2018 and have easily proven themselves durable and without compromise on power, reliability and response.

 

Fully cast in the UK and hand finished with all genuine high grade K04/16 components, these custom-made units come fully guaranteed to blow the competition away.

X57 results are in

318 whop (365bhp dyn jet) and 300 lb ft of torque!

 

Gareth and the guys at Stealthiness are old school in their methods, they don't just buy parts and sell them, they spend many, many days and weeks rigorously testing them first, so we knew the X57 was going to be under the microscope for sure.
The new X-57 wasn't fitted straight to a car. It was examined and measured and compared to the already massively popular X47R and another manufacturers unit and only then, with a twist to the actuator spec it was fitted.
 

Stealthiness took their usual due-diligence approach in extensively testing this new X57 base model turbo. Both Puma speed and the calibration team at mahout were totally involved with a simple goal to find out the maximum safe power that could be extracted without over stressing the stock injectors or fuel system.
It sounds a pretty simple exercise to turn the boost up from the hugely popular V4702 X47R mapping and then trim ignition levels and waste gate duty cycle to push it to the limit, but it's not as easy as that on this new K04 frame turbo.

The new X57 unit has exceptional flow rates from its 7 blade billet compressor wheel and when you add a hot side turbine size that has more flow than the S280 with a unique cut back wheel, the mapping becomes very very involved indeed.
It was very quickly found that the stock fuel system on the Steatorrhea Fiesta ST200 couldn't keep up with this new turbo even though it's a very low mileage car. The stock flow limits of the stock injectors at our self-imposed super safe limit of 167Bar was always going to limit the power we could extract.

Is the new X57 entry model turbo too good for the stock fuel system?

There are many customers asking us for safe maps. In fact, the number one question we have at Pumaspeed is, 'Can my stock engine handle this power?', ever happy to answer, we took a decision to build the first in the new V57 map structure around the stock injector flow limits and dial in sensible boost limits and let the power find its own happy level.

The Fiesta ST has weaknesses in the gearbox and various other hardware areas. All these had to be taken into account when mapping, so with almost all mahout maps we prefer to keep the torque at around 400nm or 300lb ft.

Stealthiness took their very usual and methodical approach, as did mahout and the data analysts at Pumaspeed. They worked slowly through the data and the development of many maps until all safety levels were finally dialed in and suitable limits and power levels were hard coded into the new maps. The results as always with mahout are amazing flat torque curves that hang on and on.
So, with a final set of happy databases across the test cars, this 365bhp (318whp) and 300 lb ft (torque capped to save the gearbox) was achieved. Now 365bhp is a pretty impressive number for a turbo of this size and ability, but let's get the stats into context first to see how impressive the combination of the MAXD-OUT map and X57 results actually are.

Maximum Boost : 1.62 (23psi of boost) (Stock Boost is 1.55)
Maximum Power : 365bhp at 6600rpm 
Maximum Torque  : 300lb ft at 4000rpm
Air Fuel Ratio : set at 11.5:1 on stock fuel pump and injectors
All Power Measurements were made on Courtney Sport Dino Jet dyno on Ford Fiesta 2017 ST200 with less than 20k miles

Whats the next step for this set up?
The simple answer is to add extra fuel, by using the larger set of Bosch injectors. With another 30% more flow, we know the X57 will be able to boost a little higher and add a little more ignition and show it's true potential 

The graph below shows a very stable boost curve, it's almost fully spooled at 2500 revs and at 7500, is still making 1.62 bar so it has way more headroom left in it and a massive 5000 revs spread of pure power, it's a great shame there is no more fuel flow left in the stock pump and injectors without raising fuel pressure and potentially causing premature fuel pump tappet and cam wear.

 

Although the K04 frame units are rated at 2.2 BAR, these figures were attained at just 1.62 BAR, keeping the stock engine and fuel system happy whilst managing the additional heat created when pushing near double the stock power!

 

 

 

Drive ability day to day is incredible for a big turbo car. gone are the Garrett GT days counting the seconds whilst your turbo spools up near 4500rpm. The X57 has achieved its primary goal, offering lightning fast performance without compromising real world usability, and without the requirement for additional fueling through the use of larger injectors and cams. The stock injectors are at their safe limit with this setup but the consistent 11.5:1 AFR on this car at WOT throughout the rev range confirms there is still some headroom left in them before we are at the absolute limit.

 

For people wanting to push to the next level, we have the X57R and X57RS setups pushing past the limits of the stock fueling system by making use of our updater Bosch injectors. We also recommend only running these setups on a built motor to safeguard reliability. 

 

Contact us at Pumaspeed or any of our dealer network to discuss your future plans with the X57 turbo.

Thanks to both Gareth Kidman and STealthWerx for once again testing and confirming the capabilities of the X-Series turbos.