Cobb V2.02 Datalog on Stock E92 - Thoughts?

biz77 · 05-03-2011, 02:31 PM

Quote:

Originally Posted by Rob@Cobb

The turbos are more efficient down lower in the RPM range requiring less boost pressure to make the requested power.

Cheers,
Rob

Understood. So why not take advantage of this and run additional boost to pick up torque where the turbos have additional headroom? Your mapping on an STI, for example, calls for over 17 psi around 3,200 rpm and then tapers up top to around 13 IIRC. Is the same strategy not possible on the N54? I realize you are targeting load on this platform, so is it not possible to request additional load around 2,500 - 4,500 rpm?

Thussy · 05-03-2011, 10:36 PM

Great information coming out. Thanks for your comments Rob.

Anyone have an answer to this one?

Quote:

Originally Posted by Thussy

Going back to the timing subject - what's the downside of pulling back? Isn't it safer to pull timing back? Is the tune leaving "power on the table", not fully burning the fuel, etc?

COBB Tuning · 05-03-2011, 11:57 PM

Quote:

Originally Posted by Thussy

The ones on the secondary axis - WGDC, TPS, and Load (I understand what it is, but how is its calculated, what changes that number, etc.).

Thanks!

WGDC = Wastegate Duty Cycle. Refers to the current duty cycle being applied to the boost control solenoid.

TPS = Throttle Position Sensor. Refers to the throttle plate's current position (in this case, in percentage of opening past fully closed).

Cheers,
Lance

Rob@Cobb · 05-04-2011, 12:24 PM

Quote:

Originally Posted by biz77

Understood. So why not take advantage of this and run additional boost to pick up torque where the turbos have additional headroom? Your mapping on an STI, for example, calls for over 17 psi around 3,200 rpm and then tapers up top to around 13 IIRC. Is the same strategy not possible on the N54? I realize you are targeting load on this platform, so is it not possible to request additional load around 2,500 - 4,500 rpm?

Currently we are working with the stock load/boost strategy, however we are working to modify the strategy to allow boost targeting as that seems to be what the market is asking for.

You are correct that there is safe power left on the table by keeping boost lower in the 2500-4000 RPM range. I would say anywhere from 30-50 lb/ft.

Quote:

Going back to the timing subject - what's the downside of pulling back? Isn't it safer to pull timing back? Is the tune leaving "power on the table", not fully burning the fuel, etc?

Pulling timing back in this case is leaving power on the table while being much safer. The quality of fuels, health of motors, and supporting parts dictates whether or not the motor can reach its minimum best timing. For safety reasons we leaving the timing lower and run boost to make power. In the future we will be increasing timing as we gain comfort with the variety of N54s in the market.

Cheers,
Rob

dzenno · 05-04-2011, 12:53 PM

Quote:

Originally Posted by Rob@Cobb

Currently we are working with the stock load/boost strategy, however we are working to modify the strategy to allow boost targeting as that seems to be what the market is asking for.

You are correct that there is safe power left on the table by keeping boost lower in the 2500-4000 RPM range. I would say anywhere from 30-50 lb/ft.

Pulling timing back in this case is leaving power on the table while being much safer. The quality of fuels, health of motors, and supporting parts dictates whether or not the motor can reach its minimum best timing. For safety reasons we leaving the timing lower and run boost to make power. In the future we will be increasing timing as we gain comfort with the variety of N54s in the market.

Cheers,
Rob

How far along are you guys with the end-user custom tuning software? Any ETA?

vasillalov · 05-04-2011, 12:56 PM

Quote:

Originally Posted by dzenno

How far along are you guys with the end-user custom tuning software? Any ETA?

I think it would reasonable to ask this question after they release Stage 2.

dzenno · 05-04-2011, 12:57 PM

Quote:

Originally Posted by vasillalov

I think it would reasonable to ask this question after they release Stage 2.

So when's that happening? Thought it was supposed to be done by end of April no?

jpsimon · 05-04-2011, 12:59 PM

Quote:

Originally Posted by vasillalov

I think it would reasonable to ask this question after they release Stage 2.

ATR should be there absolute #1 priority

Rob@Cobb · 05-04-2011, 01:07 PM

Quote:

Originally Posted by dzenno

So when's that happening? Thought it was supposed to be done by end of April no?

We are heavily working on stage 2 at current, however we are behind schedule. We are very sorry for the delays. ATP and ATR should follow the release of the Stage 2 maps. I can't give a date yet, as I would hate to miss it. However, there is nothing stopping us from putting 100% effort into the Stage 2 tunes now. In the next week or two I will start posting some info on our stage 2 progress.

We are as excited to get Stage 2 and ATR/ATP as everyone here. That means I can start looking to put bigger turbos on the car I drive every day!

Cheers,
Rob

dzenno · 05-04-2011, 02:03 PM

Quote:

Originally Posted by Rob@Cobb

We are heavily working on stage 2 at current, however we are behind schedule. We are very sorry for the delays. ATP and ATR should follow the release of the Stage 2 maps. I can't give a date yet, as I would hate to miss it. However, there is nothing stopping us from putting 100% effort into the Stage 2 tunes now. In the next week or two I will start posting some info on our stage 2 progress.

We are as excited to get Stage 2 and ATR/ATP as everyone here. That means I can start looking to put bigger turbos on the car I drive every day!

Cheers,
Rob

Don't "start looking", just put the RBs on and show us what a good flash can do with these

I don't think there's an OTS flash tune available for any of the upgraded turbos yet...i wonder why?

Clap135 · 05-04-2011, 03:03 PM

Quote:

Originally Posted by Rob@Cobb

We are heavily working on stage 2 at current, however we are behind schedule. We are very sorry for the delays. ATP and ATR should follow the release of the Stage 2 maps. I can't give a date yet, as I would hate to miss it. However, there is nothing stopping us from putting 100% effort into the Stage 2 tunes now. In the next week or two I will start posting some info on our stage 2 progress.

We are as excited to get Stage 2 and ATR/ATP as everyone here. That means I can start looking to put bigger turbos on the car I drive every day!

Cheers,
Rob

Safe to assume atr will be free just like any other platform?

Thussy · 05-04-2011, 07:55 PM

I vote for fine tuning Stage 1 for the masses - I would assume there are more folks who want to keep visually/mechanically stock cars for warranty purposes while making the most of the engine than those crazy Stage 2 folks.

mithiral67 · 05-04-2011, 08:30 PM

Quote:

Originally Posted by Thussy

I vote for fine tuning Stage 1 for the masses - I would assume there are more folks who want to keep visually/mechanically stock cars for warranty purposes while making the most of the engine than those crazy Stage 2 folks.

Cobb, this is a troll that should be ignored.

Thussy · 05-04-2011, 09:06 PM

I'll just go get FBOs then.

Quote:

Originally Posted by mithiral67

Cobb, this is a troll that should be ignored.

mithiral67 · 05-04-2011, 09:15 PM

Quote:

Originally Posted by Thussy

I'll just go get FBOs then.

Black Sheep · 05-05-2011, 07:55 AM

Quote:

Originally Posted by Rob@Cobb

We are heavily working on stage 2 at current, however we are behind schedule. We are very sorry for the delays.
Cheers,
Rob

Clap135 · 05-05-2011, 08:08 AM

Quote:

Originally Posted by Budz135i

Just noticed your Sig. Did you also run an identical 12.6 at the same trap as me on the stage 1 tune?

Black Sheep · 05-05-2011, 08:20 AM

Quote:

Originally Posted by Clap135

Just noticed your Sig. Did you also run an identical 12.6 at the same trap as me on the stage 1 tune?

Yeah, I'm 905 on the left, 2011 5.0 Mustang on the right

mithiral67 · 05-05-2011, 08:20 AM

Quote:

Originally Posted by Clap135

Just noticed your Sig. Did you also run an identical 12.6 at the same trap as me on the stage 1 tune?

Budz, was that from last nights event? Wish I could of made it, but was 10 miles into indiana for work yesterday, treking home then up to wisc was not going to happen.

Black Sheep · 05-05-2011, 08:22 AM

Quote:

Originally Posted by mithiral67

Budz, was that from last nights event? Wish I could of made it, but was 10 miles into indiana for work yesterday, treking home then up to wisc was not going to happen.

Yeah, Just come to the June 1st event

Mr.Nice had a better run than me

Clap135 · 05-05-2011, 08:31 AM

Nice time looks lime you guys had good conditions.
You eight is about 2-3 higher than mine but we got the same trap. Maybe the weight of my car had something to.do with that. Any other n54s out there with you?

Black Sheep · 05-05-2011, 08:34 AM

Yeah Mr.Nice's 135i did 12.5@111 he had some traps 113-114 same mods just different manufacturers, He has AA DP's & HPF Intercooler, Was our first time this year and know we can do better. With a Meth&Race gas tune should be interesting

oh we were also on 2.01

05-04-2011, 07:55 PM	#34
Thussy First Lieutenant 14 Rep 309 Posts Drives: E92 N54 Join Date: Jan 2011 Location: Southern Ontario iTrader: (0) Garage List 2008 BMW 335i [10.00]	I vote for fine tuning Stage 1 for the masses - I would assume there are more folks who want to keep visually/mechanically stock cars for warranty purposes while making the most of the engine than those crazy Stage 2 folks.
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05-05-2011, 08:31 AM	#43
Clap135 Brigadier General 102 Rep 3,460 Posts Drives: 2009 N54 Join Date: Jul 2009 Location: Sticky's Mom House iTrader: (1)	Nice time looks lime you guys had good conditions. You eight is about 2-3 higher than mine but we got the same trap. Maybe the weight of my car had something to.do with that. Any other n54s out there with you?
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05-05-2011, 08:34 AM	#44
Black Sheep A Zip an a Double Cup 80 Rep 4,462 Posts Drives: 2009 BMW 135i Join Date: Feb 2010 Location: McHenry, IL iTrader: (5)	Yeah Mr.Nice's 135i did 12.5@111 he had some traps 113-114 same mods just different manufacturers, He has AA DP's & HPF Intercooler, Was our first time this year and know we can do better. With a Meth&Race gas tune should be interesting oh we were also on 2.01 __________________ PTF Tuned \| RB's \| AMS FMIC \| AR DP's \| HPF Exhaust \| CP-E DCI \| Apex Arc 8's \| 235/275 Star Specs \|
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