I'd like to contribute to the community and share with you my recent dyno session. Tim Bailey initially e-tuned my GT-R on E85 using Cobb, just using street logs. Once he felt comfortable with the street tune, it was time to check power levels and fine-tune the map on a dyno. I dyno-ed at Eurocharged Performance in Houston, TX on an AWD DynoJet.
My Car
2015 GT-R Black Edition
E85 Flex Fuel (running E79 for the day)
SBD700
Bosch EV14 1150 cc Injectors
SBD 3" Intake
SBD 3" Catless Downpipe
SBD 3.5" Non-Resonated Midpipe
SBD 3.5" Street Spec Exhaust
DW300C Fuel Pumps
Visconti Flex Fuel Kit
Cobb Accessport NIS-008
Tune by Tim Bailey
Run 3, 4, and 5 Overlay
Run 3 (19.5 psi - 649 HP - 636 ft-lb) - v700 map
Run 4 (19.0 psi - 650 HP - 618 ft-lb) - v800 map
Run 5 (19.3 psi - 642 HP - 619 ft-lb) - v900 map
As you can see, the v700 map (Run 3) resulted in a staggering 649 HP and 636 ft.-lb!!! Tim commented that this is the highest FBO car he's ever tuned that was run on this particular dyno--a real beast. Since these numbers were too high for my stock transmission and engine, Tim sent me v800 tune to lower things a bit. With he v800 tune (Run 4), the horse power stayed about the same (650 HP), but he was able to drop the torque to 618 ft-lb. Still not satisfied with the results, Tim sent me a v900 tune (Run 5), and brought the horse power down a bit to 642 HP, but kept torque about the same at 619 ft-lb. After looking at my data log for Run 5, Tim felt satisfied and confident that the car was not only running strong, but safely, so we called it a day.
Here are data log graphs from my Run 5:
Below is a comparison of Run 2 (a 16.4 psi map) with the same Run 5 (19.0 psi map) as shown above. As you can see, increasing boost by ~3 psi, resulted in about 21 HP and 30 ft-lb gain.
Run 2 and 5 Overlay
Run 2 (16.4 psi - 621 HP - 589 TQ) - v600
Run 5 (19.0 psi - 642 HP - 619 TQ) - v900
Videos
[flash=425,350]https://youtu.be/d5rmk1XWb7k[/flash]
[flash=425,350]https://youtu.be/g26Gq0Siga4[/flash]
Conclusion
Big thanks to Tim Bailey for working so hard on my tune. He delivers great customer service and I recommend him to anybody interested in a Cobb custom tune.
And also thanks to the SBD crew for making/selling quality parts that don't break the bank.
I think my dyno figures teach a good lesson--you do not necessarily, need the most expensive after-market parts to get big time FBO numbers. Not only is the quality of the hardware important, but the tune is just as important to make great power, safely.
My Car
2015 GT-R Black Edition
E85 Flex Fuel (running E79 for the day)
SBD700
Bosch EV14 1150 cc Injectors
SBD 3" Intake
SBD 3" Catless Downpipe
SBD 3.5" Non-Resonated Midpipe
SBD 3.5" Street Spec Exhaust
DW300C Fuel Pumps
Visconti Flex Fuel Kit
Cobb Accessport NIS-008
Tune by Tim Bailey
Run 3, 4, and 5 Overlay
Run 3 (19.5 psi - 649 HP - 636 ft-lb) - v700 map
Run 4 (19.0 psi - 650 HP - 618 ft-lb) - v800 map
Run 5 (19.3 psi - 642 HP - 619 ft-lb) - v900 map
As you can see, the v700 map (Run 3) resulted in a staggering 649 HP and 636 ft.-lb!!! Tim commented that this is the highest FBO car he's ever tuned that was run on this particular dyno--a real beast. Since these numbers were too high for my stock transmission and engine, Tim sent me v800 tune to lower things a bit. With he v800 tune (Run 4), the horse power stayed about the same (650 HP), but he was able to drop the torque to 618 ft-lb. Still not satisfied with the results, Tim sent me a v900 tune (Run 5), and brought the horse power down a bit to 642 HP, but kept torque about the same at 619 ft-lb. After looking at my data log for Run 5, Tim felt satisfied and confident that the car was not only running strong, but safely, so we called it a day.
Here are data log graphs from my Run 5:
Below is a comparison of Run 2 (a 16.4 psi map) with the same Run 5 (19.0 psi map) as shown above. As you can see, increasing boost by ~3 psi, resulted in about 21 HP and 30 ft-lb gain.
Run 2 and 5 Overlay
Run 2 (16.4 psi - 621 HP - 589 TQ) - v600
Run 5 (19.0 psi - 642 HP - 619 TQ) - v900
Videos
[flash=425,350]https://youtu.be/d5rmk1XWb7k[/flash]
[flash=425,350]https://youtu.be/g26Gq0Siga4[/flash]
Conclusion
Big thanks to Tim Bailey for working so hard on my tune. He delivers great customer service and I recommend him to anybody interested in a Cobb custom tune.
And also thanks to the SBD crew for making/selling quality parts that don't break the bank.
I think my dyno figures teach a good lesson--you do not necessarily, need the most expensive after-market parts to get big time FBO numbers. Not only is the quality of the hardware important, but the tune is just as important to make great power, safely.