All COBB Tuning AccessPORT Flash for N54 335i Discussion Here

acdHQK713K · 08-09-2011, 11:37 PM

Quote:

Originally Posted by themyst

When stage 2 comes out, I am contemplating running a small meth nozzle, like a M1 or DO1 only for cooling on a 50/50 mix. If the meth isn't flowing it won't be disastrous since it is tuned for pump gas.

Anyone else considering this?

Has anyone actually evaluated the potential benefits of doing this on an otherwise pump gas map? It seems that the benefits, cooling included, would be almost negligible.

I've thought about doing it so I can run the 93 octane map with 91 octane in the tank. But I think you even advised against this given the minimal benefits with respect to HP

Jeff@TopGearSolutions · 08-10-2011, 12:58 AM

Without specifically tuning ignition and boost for your meth you cant optimize your performance. Can you help an OTS map? yes, how much depends.

BMW72 · 08-10-2011, 01:06 AM

I was told that the COBB tuner throws alot of codes and you need a BT tool to clear them before you head to the dealer ? Is this true ?

enrita · 08-10-2011, 03:21 AM

Quote:

Originally Posted by BMW72

I was told that the COBB tuner throws alot of codes and you need a BT tool to clear them before you head to the dealer ? Is this true ?

No......

BMW72 · 08-10-2011, 03:51 AM

Quote:

Originally Posted by enrita

No......

Can anyone confirm this ? I was told this by a company that sell quite a few different tunes here, I 'd like to be sure !

enrita · 08-10-2011, 03:53 AM

Quote:

Originally Posted by BMW72

Can anyone confirm this ? I was told this by a company that sell quite a few different tunes here, I 'd like to be sure !

I have seen it with my own eyes and checked with ISTA BMW program after removal of cobb. Completely untampered and no codes.

franzzz · 08-10-2011, 05:58 AM

Quote:

Originally Posted by enrita

I have seen it with my own eyes and checked with ISTA BMW program after removal of cobb. Completely untampered and no codes.

I confirm.

BMWsky · 08-10-2011, 06:42 AM

Quote:

Originally Posted by BMW72

I was told that the COBB tuner throws alot of codes and you need a BT tool to clear them before you head to the dealer ? Is this true ?

This comes up a lot. You have to be sure that you're running the latest Cobb update or there could be a chance you'll leave a shadow code. If you're running the latest firmware update, you're good to go. I tested it myself against a BT tool.

themyst · 08-10-2011, 07:41 AM

Quote:

Originally Posted by Jeff@topgearsolutions

Without specifically tuning ignition and boost for your meth you cant optimize your performance. Can you help an OTS map? yes, how much depends.

If ur intention is to use meth as a supplemental fuel, then yes you need to tune for meth for the greatest benefit.

What I am asking is merely using meth/water injection to keep cylinder temps and IAT down. Being that Cobb uses the dme load-based power logic, there are other benefits to keeping IAT down.

Jeffman · 08-10-2011, 07:59 AM

Quote:

Originally Posted by mithiral67

Was this in response to my comment or just a general observation.

What's ATR stand for? (Sorry - I checked the acronym listing and couldn't find ATR.)

mithiral67 · 08-10-2011, 08:06 AM

Quote:

Originally Posted by JHR

What's ATR stand for? (Sorry - I checked the acronym listing and couldn't find ATR.)

Its cobb's user/tunner shops software for customizing the tune. It will allow users or tuner shops to dyno or road tune a car.

Jeffman · 08-10-2011, 08:12 AM

Quote:

Originally Posted by mithiral67

Its cobb's user/tunner shops software for customizing the tune. It will allow users or tuner shops to dyno or road tune a car.

Thanks....I found it on the Cobb website...Access Tuner Race, or something like that. Sounds dangerous in the hands of non-professionals.

E90SoFlo · 08-10-2011, 08:15 AM

Quote:

Originally Posted by JHR

Thanks....I found it on the Cobb website...Access Tuner Race, or something like that. Sounds dangerous in the hands of non-professionals.

They have "restrictions" on some of it, but you will not want to be clicking around unless you know what you're doing.

bkrM3 · 08-10-2011, 08:56 AM

Quote:

Originally Posted by BMW72

I was told that the COBB tuner throws alot of codes and you need a BT tool to clear them before you head to the dealer ? Is this true ?

Quote:

Originally Posted by enrita

No......

Quote:

Originally Posted by enrita

I have seen it with my own eyes and checked with ISTA BMW program after removal of cobb. Completely untampered and no codes.

Quote:

Originally Posted by franzzz

I confirm.

Quote:

Originally Posted by BMWsky

This comes up a lot. You have to be sure that you're running the latest Cobb update or there could be a chance you'll leave a shadow code. If you're running the latest firmware update, you're good to go. I tested it myself against a BT tool.

I can also confirm. Uninstalled then tested with BT - was even on previous firmware at the time. Scan was totally clean.

Wookie420 · 08-10-2011, 11:05 AM

Quote:

Originally Posted by BMW72

Can anyone confirm this ? I was told this by a company that sell quite a few different tunes here, I 'd like to be sure !

I confirm this also.

Jeff@TopGearSolutions · 08-10-2011, 11:24 AM

Quote:

Originally Posted by themyst

If ur intention is to use meth as a supplemental fuel, then yes you need to tune for meth for the greatest benefit.

What I am asking is merely using meth/water injection to keep cylinder temps and IAT down. Being that Cobb uses the dme load-based power logic, there are other benefits to keeping IAT down.

I dont use meth for fuel. I use it to maximize performance. You still cant maximize performance on a OTS map. AKA you're leaving power on the table. Ignition targets only go so high on OTS maps and boost.

themyst · 08-10-2011, 12:57 PM

Quote:

Originally Posted by Jeff@topgearsolutions

I dont use meth for fuel. I use it to maximize performance. You still cant maximize performance on a OTS map. AKA you're leaving power on the table. Ignition targets only go so high on OTS maps and boost.

So you're saying you can run 17-18 psi reliably on a piggyback without meth/race gas? As stated previously, I am trying to keep IAT down only to keep boost down due to the flash tunes load targeting approach, which in turn should save compressor life. No ones talking about maximizing performance on an OTS stage 2 map, that will come with ATR. I am merely trying to suppress heatsoak.

dzenno · 08-10-2011, 01:01 PM

With enough timing pulled you could run 20psi on pump gas

but then what's the point...trade offs aren't worth while...you want to run the max timing curve for a given power level with as much boost without knocking...start there and up boost, keep octane the same...when you encounter knock, go back down on timing and a bit, check for knock for the same octane, then up boost a bit more...if there's no knock up boost until you see knock, then lower it down a bit and you're done

then play with IAT based timing compensation..

805beemer · 08-10-2011, 03:50 PM

Quote:

Originally Posted by themyst

If ur intention is to use meth as a supplemental fuel, then yes you need to tune for meth for the greatest benefit.

What I am asking is merely using meth/water injection to keep cylinder temps and IAT down. Being that Cobb uses the dme load-based power logic, there are other benefits to keeping IAT down.

My old 04 Sti did something similar to what your talking about. It had an Intercooler spray button that you could press and it would spray water either on or in the intercooler, not sure. But was a cool feature, and I know guys used to mod it so it would spray anytime you went over a certain boost psi.

Jeff@TopGearSolutions · 08-10-2011, 03:51 PM

Quote:

Originally Posted by themyst

So you're saying you can run 17-18 psi reliably on a piggyback without meth/race gas? As stated previously, I am trying to keep IAT down only to keep boost down due to the flash tunes load targeting approach, which in turn should save compressor life. No ones talking about maximizing performance on an OTS stage 2 map, that will come with ATR. I am merely trying to suppress heatsoak.

Not sure where I said that?

99% of people want meth to maximize/optimize performance. As you can see there are people here already trying meth even on stage 1 hoping for gains and finding none.

themyst · 08-10-2011, 09:53 PM

@Jeff and @dzenno:

Like I said before, once ATR comes out, this is all a moot point. All I want to do is suppress heatsoak on a fixed OTS stage 2 map when it comes out. My original question was merely IF anyone was going to do what I originally asked about. I have no issues road tuning on ATR once available for maximum benefit; the challenge is keeping compressor wear down by keeping IATs down on a tune that uses the DME's load-targeting logic.

We all know high IATs cause a Cobb stage 1 to target upwards of 16 psi peak due to the increased boost required to hit the load target. I am sure even the stage 1 guys are reaping some benefits in regards to compressor wear if they were to run meth. They won't run any faster, but lower IATs = higher density charge = less boost to hit load target.

Murf · 08-10-2011, 09:58 PM

Quote:

Originally Posted by Alan l.

I've been running V203 on my 6MT lately and it seems to be pretty smooth. Less throttle surging during part throttle driving. I was previously on V202v2.

Really??! I was led to believe there were no changes to v2.03 other than fixing shifting issues on AT cars. Can anyone confirm what they actually *did* to v2.02 to turn it into v2.03?

I will give it a try, can't hurt. Hopefully its not just placebo effect.

08-10-2011, 12:58 AM	#1982
Jeff@TopGearSolutions 3441 Rep 79,212 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Without specifically tuning ignition and boost for your meth you cant optimize your performance. Can you help an OTS map? yes, how much depends.
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08-10-2011, 01:06 AM	#1983
BMW72 Private First Class 15 Rep 178 Posts Drives: 2009 335i XDrive Join Date: Jul 2011 Location: Pittsburgh iTrader: (1) Garage List 2009 BMW 335I X-DRIVE [1.00]	I was told that the COBB tuner throws alot of codes and you need a BT tool to clear them before you head to the dealer ? Is this true ? __________________ 2009 BMW 335i X-Drive
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08-10-2011, 01:01 PM	#1998
dzenno Banned 273 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	With enough timing pulled you could run 20psi on pump gas but then what's the point...trade offs aren't worth while...you want to run the max timing curve for a given power level with as much boost without knocking...start there and up boost, keep octane the same...when you encounter knock, go back down on timing and a bit, check for knock for the same octane, then up boost a bit more...if there's no knock up boost until you see knock, then lower it down a bit and you're done then play with IAT based timing compensation..
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08-10-2011, 09:53 PM	#2001
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	@Jeff and @dzenno: Like I said before, once ATR comes out, this is all a moot point. All I want to do is suppress heatsoak on a fixed OTS stage 2 map when it comes out. My original question was merely IF anyone was going to do what I originally asked about. I have no issues road tuning on ATR once available for maximum benefit; the challenge is keeping compressor wear down by keeping IATs down on a tune that uses the DME's load-targeting logic. We all know high IATs cause a Cobb stage 1 to target upwards of 16 psi peak due to the increased boost required to hit the load target. I am sure even the stage 1 guys are reaping some benefits in regards to compressor wear if they were to run meth. They won't run any faster, but lower IATs = higher density charge = less boost to hit load target. __________________ E90 LCI N54 6AT
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