LuckyX2

So after a lot of time contemplating whether I would get a GTX2867 or EFR6758 I eventually came across something I hadn't heard of before, the EFR7163...

Now this turbo is what the EFR's should have been from the very beginning!



Think of this as essentially a second generation EFR with a whole new "mixed flow" turbine design. Here's a some reading on what advantages mixed flow turbines bring.

http://www1.eere.energy.gov/vehicles...deer11_sun.pdf

Garrett has been using the same outdated turbine wheel for decades so clearly engineers can come up with something better by now, right? Mixed flow is that better design. So what does this mean for us in terms of end results? Well, it means faster spool on a larger turbo for both low and high rpm power.

Review from Perrin:
Borg Warner EFR-7163 Test and Tune » PERRIN Performance Official Blog

Faster time to torque than the 6758 (Spools about the same but makes more power):


Spools faster than the 7064 (Shouldn't say 6758):


Here's a good quote from a guy running a prototype model on his Mazdaspeed 6:
"The spool is unreal. We went from vacuum to 22 psi in 400-500 RPM ANY time we hit the gas above 2400 RPM."

So what are your thoughts guys? Seems like a pretty big leap in turbo performance to me and the "revolution" the EFR's were supposed to be.

2014 RELEASE UPDATE!

The 7163 is finally available to buy and in new housing options like 0.80 T4 twinscroll and V band IWG or EWG
BorgWarner EFR 7163 Turbo - Full-Race.com

Here's what the compressor map looks like:


Here's it overlayed with GT30 maps. Much broader.


Overlayed with a GTX3071. Still broader.


And here's what it should theoretically do on an SR20 at 25psi and 7500rpm max:
BW Match Bot Map



More map points on a 2L, courtesy of Kingtal0n:


Image of the change in turbine geometry:


Looks like they upped the power estimates by 50hp from their original 225-500hp range:


This R35 is already breaking records with twin 7163s:

What record it is exactly, I'm not sure.