EFR v. GT turbo... what's the difference?

[Mostlynotgay]

This is an incredibly noob question, and I apologize if it's been asked and answered. But I'm seeing that there seems to be two types of turbos for the Fiesta. a "GT" (ATP) and an EFR (2J). I'm curious, what's the difference between the two? Meaning, is GT/EFR just a manufacturers branding, or is there a tangible difference between the two turbochargers?

 

[rooSTer]

The EFR is made by BorgWarner and the GT by Garrett.

Both kits are supposed to be good for +400hp. ATP is available for sale and 2j is still in development.

 

[Mostlynotgay]

So it's not like two different turbo technologies? It's just ATP calls it a GT, Borg calls it an EFR?

 

[SecretSquirlTuned]

So it's not like two different turbo technologies? It's just ATP calls it a GT, Borg calls it an EFR?

2 Different Turbochargers

 

[razorlab]

It's also tech.

GT turbos are basically old tech, GTX is new tech compressor turbine aero. In general the GTX outperforms a GT of the same size in almost everything (spool, flow, response)

EFR is new tech with new turbine aero, better turbines and housings, which means a smaller turbo can outperform a older larger turbo. So EFR is good for small spaces too.

 

[Sourskittle]

Something tells me.... ATP left a lot on the table. Like they just... Put a turbo on, got it close, ran it, moved to the next turbo. Installed it, ran it, next turbo. I'm not claiming to know for sure, but I bet the smaller turbos could do way better than ATP tuned them to. Not because they were not capable of doing so, but because they had other turbos to install/test.

The small GTX turbo has to be good for more than 260whp in the " end game".

Someone with a really good knowledge on the tuning and hardware and ethanol has to be able to beat 260whp. ( hint hint , no pressure Razor, lol. ).

Razor your getting more of a medium size one though , right?

 

[Mostlynotgay]

So realistically, if you're looking at the GT/GTX by ATP, and you dont' really care about having "ALL THE POWER," you just think the stock turbo is not quite good enough, is the GTX more reliable than the GT? Or, said differently, is there a powerfully compelling reason to pick the GTX over the GT, assuming you're not trying to have the highest numbers on the Dyno/

 

[Sourskittle]

I'd take a gtx is going to have more response. With a "big turbo" lmao, I'd try to keep all the response I could.

 

[razorlab]

I agree with you on the left on the table part.

Keep in mind the smaller Garrett 2554R turbo ATP made 260whp was not a GTX turbo. GTX is only 2860R and above.

The turbo I am looking at is the GT2560R

The BW KP39 OEM turbo is capable of approx 21 lb/min

The GT2554R is capable of approx 27 lb/min
54mm compressor, 53mm turbine

The GT2560R is capable of approx 35 lb/min
60mm compressor, 53mm turbine

The GTX2860R is capable of approx 42 lb/min
60mm compressor, 53.9mm turbine

You can see the GT2560R shares the wheel sizes basically with the GTX2860R but the GTX aero flows so much more

For comparison, the Evo 10 stock turbo is a Mitsu TD05HA-152G6 with a 68mm compressor and a 56mm turbine and is capable of approx 37 lb/min

 

[Mostlynotgay]

I a

The turbo I am looking at is the GT2560R

The BW KP39 OEM turbo is capable of approx 21 lb/min
The GT2554R is capable of approx 27 lb/min

The GT2560R is capable of approx 35 lb/min

The 2560 is the one I was lookin' at, too. But was wondering if it was worth it to drop the extra $400 for the GTX, or it the GT, itself, is plenty. Again, I'm not going for a numbers game here, I just think the stock turbo is less than the little FiST deserves.

 

[Sourskittle]

Sounds like I need to get 14b, upgrade the compressor wheel, and put it on the fist, lmao. Or just buy a stock evo turbo, lol.

 

[razorlab]

I personally think the GTX2860R is a tad big for the 1.6L

For drag it would be fine, for the street unless you are doing hwy top end pulls it would be meh.

 

[Sourskittle]

They don't have optional turbine housings?

 

[razorlab]

They don't have optional turbine housings?

The GTX2860R for the FiST is already the "small".64 A/R

 

[Sourskittle]

That's what I means... "A smaller than .64 A/R" would be great. But I realize most their turbos are built for 1.6L at turn 8500rpms ( hondas ) or 1.8L+ that turn 7,000 rpms or more. Not a 1.6L that is done at 7,000rpms.

Razor, you think ATP spun our motor higher than 7,000 rpms? I would if I had the turbo to do it and was just looking for dyno/track numbers.

 

[razorlab]

I don't see any reason to run smaller than a .64 A/R on a Garrett turbo. I would drop down in turbo size before doing something silly like that.

I know ATP spun to at least 7300rpm.

 

[Sourskittle]

Perrion or what ever pushed 7500rpms I think.
Wonder where the cams/head really start to choke...
How crazy would it be to find out later that the motor made power to 82000rpms or something crazy, lol. Doesn't matter to me, just interesting.

 

[SecretSquirlTuned]

I think the cams and head design on our car will not be happy at 7500+ rpm, I would love to spin mine out to 8000 have a nice long power band and make good use of this 6spd we have. I hate my diesel power band I have now.

 

[Sourskittle]

Fiesta says, "glag glag glag glagg".

 

[SecretSquirlTuned]

If someone will buy me the ATP unit I will test the limits of it.