Boost logs with stock N75, ECS N75 RACE, and MBC only.

Ochlockonee · 08-18-2005, 03:16 PM

This is with MTM stg IV software.
Sorry about the different logging conditions and my graphing skills as well.

First is stock N75. I was seeing a good bit of boost taper.

My N75 stopped working after I tried to adjust it, so I sprang for ECS Tuning's N75 RACE. It came with a major boost spike, but the taper was gone. I personally don't have too much of a problem with it. Whatever midrange torque I had lost after installing the 2.8L cams was back with a vengeance after I put this valve on. It could have been a little smoother though.

After seeing that my software didn't cut throttle or set any boost deviation codes after the RACE N75's antics, I decided to try an MBC only without a Throttle Cut Defender.

As you can see, the MBC only setup rocks.

Imolavirus@BuehnEngineering · 08-18-2005, 03:18 PM

Funkweasel · 08-18-2005, 03:29 PM

slower in boost ramp than the race n75. Is that the case?

Flyboy · 08-18-2005, 03:42 PM

Funkweasel · 08-18-2005, 03:48 PM

also why I asked the question.

Flyboy · 08-18-2005, 03:53 PM

internecine · 08-18-2005, 03:53 PM

the scaling is different on the graphs and im not sure if the graphs were set up correctly, but thats what the numbers say.

Funkweasel · 08-18-2005, 03:54 PM

Ochlockonee · 08-18-2005, 04:15 PM

The N75 race log was taken in a 1-2 gear pull, so I got back into the boost at a much higher RPM.
The stock log may have been 3rd gear, the others second.
I can't tell a difference in spoolup for any of the three devices, just differences in boost peak and taper.

Ochlockonee · 08-18-2005, 04:18 PM

08-18-2005, 03:16 PM	#1
Ochlockonee Member Account #: 72863 Join Date: Mar 2004 Posts: 2,953	Boost logs with stock N75, ECS N75 RACE, and MBC only. This is with MTM stg IV software. Sorry about the different logging conditions and my graphing skills as well. First is stock N75. I was seeing a good bit of boost taper. My N75 stopped working after I tried to adjust it, so I sprang for ECS Tuning's N75 RACE. It came with a major boost spike, but the taper was gone. I personally don't have too much of a problem with it. Whatever midrange torque I had lost after installing the 2.8L cams was back with a vengeance after I put this valve on. It could have been a little smoother though. After seeing that my software didn't cut throttle or set any boost deviation codes after the RACE N75's antics, I decided to try an MBC only without a Throttle Cut Defender. As you can see, the MBC only setup rocks. __________________ "No, a flux capacitor is not compatible with a ham sandwich."

08-18-2005, 03:18 PM	#2
Imolavirus@BuehnEngineering Elder Member Account #: 33927 Join Date: Mar 2002 Posts: 17,986	wow, i'm suprised to see how little taper if any there is with the mbc only setup __________________ -Jacob ^^^CLICK SIG FOR BUEHN ENGINEERING WEBSITE^^^ <big><big>Website Here!!!</big></big> <big>Items For Sale</big>

08-18-2005, 03:29 PM	#3
Funkweasel AudiWorld Super User Account #: 28517 Join Date: Nov 2001 Posts: 10,145	I can't tell from the rpm axis for sure but it looks like the mbc only is quite a bit slower in boost ramp than the race n75. Is that the case?

08-18-2005, 03:42 PM	#4
Flyboy AudiWorld Super User Account #: 4736 Join Date: Apr 2000 Posts: 3,504	The RPM axis doesn't show rpm. Hard to compare. __________________ <url="http://www.myaudis4.com/index.htm"> <img]http://www.myaudis4.com/sig.gif</img></url> <url="http://www.motorists.org/">National Motorists Association</url>

08-18-2005, 03:48 PM	#5
Funkweasel AudiWorld Super User Account #: 28517 Join Date: Nov 2001 Posts: 10,145	It says rpm on the axis for two of them so I assumed it was probably similarly scaled. But that's also why I asked the question.

08-18-2005, 03:53 PM	#6
Flyboy AudiWorld Super User Account #: 4736 Join Date: Apr 2000 Posts: 3,504	Seems it's labeled RPM (last one), but just using a default numbering. Doubt it's scaled correctly. __________________ <url="http://www.myaudis4.com/index.htm"> <img]http://www.myaudis4.com/sig.gif</img></url> <url="http://www.motorists.org/">National Motorists Association</url>

08-18-2005, 03:53 PM	#7
internecine Member Account #: 66400 Join Date: Dec 2003 Posts: 5,802	if the RPm is correct, MBC only sees full boost at 3200 rpm, the others see full boost around 4600 the scaling is different on the graphs and im not sure if the graphs were set up correctly, but thats what the numbers say.

08-18-2005, 03:54 PM	#8
Funkweasel AudiWorld Super User Account #: 28517 Join Date: Nov 2001 Posts: 10,145	True. Hopefully he can just answer the question about which ramps faster.

08-18-2005, 04:15 PM	#9
Ochlockonee Member Account #: 72863 Join Date: Mar 2004 Posts: 2,953	Sorry it took so long to reply. Same spoolup for MBC and N75 race. The N75 race log was taken in a 1-2 gear pull, so I got back into the boost at a much higher RPM. The stock log may have been 3rd gear, the others second. I can't tell a difference in spoolup for any of the three devices, just differences in boost peak and taper. __________________ "No, a flux capacitor is not compatible with a ham sandwich."

08-18-2005, 04:18 PM	#10
Ochlockonee Member Account #: 72863 Join Date: Mar 2004 Posts: 2,953	My graphing skills leave something to be desired. The MBC only X axis is actually time. __________________ "No, a flux capacitor is not compatible with a ham sandwich."

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