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Discussion Starter · #1 ·
RE: Ford Fiesta forum...

GI: X37 and X47 Turbo Bundles.

https://r.tapatalk.com/shareLink?sh...com/forum/showthread.php?t=12626&share_type=t

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I wonder if they are going to offer this for us also... The PumaSpeed upgraded turbo is rated around ~320whp... I'm good with with for half the price of a ATP upgrade.

Focus info from PumaSpeeds website...

Focus ST250 X-37-360 Hybrid Turbocharger - Focus Mk3 ST (250PS) - Uprated Turbochargers - Pumaspeed Milltek Ford Performance Tuning Milltek Sport Exhaust Ford Fiesta Focus ST RS Parts Specialist

Uprated Focus ST 250 Ecoboost Hybrid Ford Turbo charger - Pumaspeed

Direct Bolt on replacement
Larger Exhaust turbine wheel
Larger Billet Compressor Wheel
Cut Back Exhaust Blades for even more extra flow.
Machined Exhaust housing for extra flow
Uprated Motorsport Thrust Bearing.
Stock Location Direct Bolt on.

The X-37-360 need only make one simple statement, 323 whp.
Whatever Dyno calculation you prefer to use to create the crank bhp figure the WHP number cannot be disputed.


Thoughts?



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Whp can easily be disputed based on type of dyno, elevation, correction factors... among other things.

That said I'm be interested to see some data and results on this.
 

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Discussion Starter · #4 ·

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From what I remember reading the consensus was the small turbine housing is probably the limiting factor, and makes a bigger compressor not a good match for the turbine side.

But I like to keep an open mind, I'd love to see a turbo that performs well on stock engine/stock fueling limits for less than the GTX/EFR offerings.
 

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Man I wanted to go this route, I got a used stock turbo already to send it in. But I always had a strange feeling about it. I even said no when someone offered a ready hybrid for a really good price. Now I´m looking for a good deal for a used SBD red kit or ATP... or maybe get it new somewhen.
 

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If stratified offered this turbo with a tune from them that was proven safe I'd be all over it. At that point it's just the reliability of the turbo thats in question.
 

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Small housing is a small housing. No amount of wheel/turbine trickery can fix what a small housing does
@RickyST read what he said and retract your statement. Modding the wheel still makes it a small housing. Thats why I would just go 2863 anyways. I'd rather have something that flows better, than something that I have to worry about.
 

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Discussion Starter · #12 ·
So I guess the real question is why would stratified get behind a possible ticking time bomb of a turbo upgrade? Is there something different about the upgradeability of the stock fiesta turbo....?


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Pumaspeed's turbos are actually proven and raved about on the Fiesta ST forums. Plenty of members are pushing north of 280whp on the Fiesta ST platform and I spoke to the member who is from the U.K. who made the 325whp on the Focus and his car does not have any surge or general drivability issues.

The compressor and turbine wheels are actually balanced this time around as opposed to Gpop shop stuffing billet batmo wheels on the K03 housing and hoping for magic.

I hope to see more info on people going this route because I have been considering it myself.

If you can make 330whp while paying half the price for an ATP then that's golden. I haven't heard any news of Pumaspeed turbos exploding yet so I would look at this new hybrid market with a bit more positivity rather than relating it to the zombie turbos from a few years back.

It's a great option for someone who doesn't want to drop 2K minimum on a Garrett Kit not including a blowoff Valve or an EFR kit.


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Various tuners wouldn't support these hybrids if they just blew up like the ones form back in the day, lol.


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Here's what we know and what we don't know about the hybrids:

- Pumaspeed X37 has been a very nice upgrade for the Fiesta ST. There the compressor wheel is upsized and exhaust turbine has clipped blades like the hybrid for the Focus ST.
- With an increase in compressor you generally want a better flowing turbine. Not always but a good rule of thumb - of course it depends on the current turbine size, AR and compressor. The Garrett 28 series turbine can be had with a 60,63,67,71 compressor. The 71 is a little surge prone on our 2.0 engine.
- The hybrid for the Focus ST has a clipped turbine with some porting on the housing and the following new wheel spec:

Billet Wheel sizes :
Old:

Inducer – 40.90mm
Exducer – 50.90mm
Trim size – 64 trim
New:

Inducer – 46.30mm
Exducer – 56.00mm
Trim size – 68 trim

To put that in perspective a GTX2860 has a compressor:

45.7mm inducer
60mm exducer

Overall the compressor on the hybrid is below a 2860 ... so expect it to sit around 330whp with bolt ons and high octane (E30 or similar). Basically expect a 30-40whp advantage over stock.

I haven't tuned one of these hybrids but these are ballpark expectations. While the Fiesta hybrid has been reliable, I can't speak for this one.

The other difficulty which I am sorting out now is importing these turbos from the UK. Shipping is expensive and if cores are shipped back it gets even more expensive. I can give you guys an idea of the pricing once I get this sorted out. I am not sure if the final price will be attractive versus spending more for a GTX. Keep in mind that the restrictive exhaust housing on the OEM turbo means that hybrids like this won't be able to match the performance of a Garrett full replacement so this comes down to your power goals as well. It would fit well within the OEM fuel system capabilities.
 

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Good news to see what it will do! For us in Europe it´s the opposite, to get an ATP kit here costs at least 3k€, so the Pumaspeed hybrid sounds really good from the finacial point of view. And it would fit into my power goals (well, almost...). I´m only afraid it would die too soon if pushed hard like... that one... (we all know ) Oh, and I have a stock turbo here and no idea what to do with it so far.
 
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