Here is a reference of the latest development of Standard RB Turbos combined with TFT inlets, allowing unrestricted RB Turbo Performance on our customer car documented here:
http://www.bimmerboost.com/showthrea...-w-Sub-50-WGDC
Datapoints-
RB Car (Blue lines)
E92 XI/AWD Automatic Transmission in 4th gear. Independent results.
RB Standard Turbos with TFT inlets, Billet 15T Compressor, MHI 12 blade clipped turbine, stock charge pipe
Boost- Unknown (slightly below 50% WGDC)
Fueling/Tuning- OEM HPFP with inline LPFP. E60. Fueling insufficient at this time and to be addressed at a later date. Wedge/BQ Tuning.
VTT Car (Red lines)
E90 RWD Manual Transmission in 4th gear. Shop results.
VTT 2+ Turbos with no inlets, Billet 20T Compressor, Proprietary 9 blade Garrett turbine with a 15* clip, stock charge pipe
Boost- ~29-25psi (slightly below 70% WGDC)
Fueling- VTT Double Barrel with SteveAZ LPFP solution. 100% E85. Fueling sufficient to max out turbos. PTF Tuning.
As you can see the RB car having a very evident disadvantage with drivetrain losses, manages to absolutely destroy the VTT 2+ car at low RPM's and even hang right with them on the top end. The RB car seems to have much nicer results overall considering the drivetrain losses (not even considering the 20% extra WGDC potential in the RB's yet unleashed!!!).
Without going too much into the hardware decisions made in each setup, it is fair to say that one is demonstrating a MUCH better curve and response than the other… while maintaining a similar top end at less effort. So sharing this comparison graph seemed appropriate.
Thanks,
Rob
PS. Sorry if the overlay is not of the best quality. We had to have it quickly photoshopped.
PSS. Some may take note of the VTT graph NOT being the advertised 645rwhp record. We will gladly redo the overlay if anyone can prove that the 645rwhp RECORD has a verifiable MPH dyno to prove it was in 4th gear (and not 5th); as we could not source that evidence NOR was VTT supportive in providing it.
http://www.bimmerboost.com/showthrea...-w-Sub-50-WGDC
Datapoints-
RB Car (Blue lines)
E92 XI/AWD Automatic Transmission in 4th gear. Independent results.
RB Standard Turbos with TFT inlets, Billet 15T Compressor, MHI 12 blade clipped turbine, stock charge pipe
Boost- Unknown (slightly below 50% WGDC)
Fueling/Tuning- OEM HPFP with inline LPFP. E60. Fueling insufficient at this time and to be addressed at a later date. Wedge/BQ Tuning.
VTT Car (Red lines)
E90 RWD Manual Transmission in 4th gear. Shop results.
VTT 2+ Turbos with no inlets, Billet 20T Compressor, Proprietary 9 blade Garrett turbine with a 15* clip, stock charge pipe
Boost- ~29-25psi (slightly below 70% WGDC)
Fueling- VTT Double Barrel with SteveAZ LPFP solution. 100% E85. Fueling sufficient to max out turbos. PTF Tuning.
As you can see the RB car having a very evident disadvantage with drivetrain losses, manages to absolutely destroy the VTT 2+ car at low RPM's and even hang right with them on the top end. The RB car seems to have much nicer results overall considering the drivetrain losses (not even considering the 20% extra WGDC potential in the RB's yet unleashed!!!).
Without going too much into the hardware decisions made in each setup, it is fair to say that one is demonstrating a MUCH better curve and response than the other… while maintaining a similar top end at less effort. So sharing this comparison graph seemed appropriate.
Thanks,
Rob
PS. Sorry if the overlay is not of the best quality. We had to have it quickly photoshopped.
PSS. Some may take note of the VTT graph NOT being the advertised 645rwhp record. We will gladly redo the overlay if anyone can prove that the 645rwhp RECORD has a verifiable MPH dyno to prove it was in 4th gear (and not 5th); as we could not source that evidence NOR was VTT supportive in providing it.
