Anyone here good with compressor maps? What would the difference be in flow between a 6758 efr and the 7163 at say 26 and 28 psi at 7500 and 8000 revs.
Just curious.

 

Do you have a pic of the map? Can't recall seeing one for it. I'd also like to know the differences, although at the point of needing the 7163 over the 6758 in terms of power my mind is starting to wonder about the exhaust manifold and how much of a restriction it will be

 

even the 7163 is still a relatively small turbo, probably capable of 56 lb/min really pushing it. in terms of a flow difference probably between the 6758 and 7163 probably about 3-5 lb/min, really depends on your setup though. if your looking for really good spool, and a really usable powerband the 7063 would be perfect

 

EFR7163 from full-race.com

Now forgive me if I'm wrong but they both look like they're out of efficiency above about 32psi, but the 7163 should be good for about 40-50hp+ over the 6758 conservatively, more on E85. Is it worth selling my ZFR to get one, nope, not to me, I'm good with over 400whp already.

Compressor Specifications

Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
Compressor Wheel OD (exducer): 71mm
Compressor Wheel Inducer: 57mm
Compressor Wheel Trim: 64%
Max Flow Rate: 60 lb/min
Compressor Housing: 2.5" Ported shroud inlet, 2.0" hose coupler outlet
Built-in BOV: All EFR compressor housings incorporate an integrated BOV.
Connections:
Inlet: 2.5" Hose Coupler
Outlet: 2.0" Hose Coupler
Turbine Specifications

Turbine type: Low Inertia Gamma-Ti Turbine Wheel
Turbine Wheel OD: 63mm
Stainless Steel Sand cast Housing
The EFR 7163 is available in (4) different turbine housing configurations:
0.85 A/R T25 (Internal WG)
0.85 A/R V-Band (Internal WG)
0.85 A/R V-Band (External WG)
0.80 A/R T4 Twin Scroll (Internal WG)- Part # 11639880002
Turbine outlet: GT-Vband (aka small 3" vband) ~92mm OD for all EFR turbos









EFR6758:

Compressor Specifications

Compressor Wheel OD (exducer): 67mm
Compressor Wheel Inducer: 53.9mm
Max Flow Rate: 53 lb/min
Built-in BOV: All EFR compressor housings incorporate an integrated BOV.
Compressor Housing: 2.5" inlet, 2.0" hose coupler outlet

Turbine Specifications

Turbine type: Low Inertia Gamma-Ti Turbine Wheel
Turbine Wheel OD: 58mm
Stainless Steel Investment cast Housing
0.64 A/R T25 Undivided (Internal WG) - Part # 179388
Turbine outlet: GT-Vband (aka small 3" vband) ~92mm OD for all EFR turbos

 

In theory 53lbs a min and 60lbs a min. But at what boost levels and to what rpms on our 2.0l. Anyone can plot it? There is Borg Warner matchbot. But I am unsure of how to fill in all the other tables.

 

From the graph you should see around 26 psi on the 7163 at around 4000 rpms, maybe a little later. Looks like it should keep that through the rpm band too. Out of efficient at 33 psi

 

I was using this:

Performance Turbos | BorgWarner Turbo Systems

Looks like on the 7163 to get close to the full 60lbs a min you need 8000rpms and at least 26/27psi.