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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Flash vs Piggyback - Where we stand today.



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      02-15-2012, 12:59 PM   #89
mithiral67
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lol, luckily everyone is to busy drooling over single turbos to argue. lets hope it lasts.
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      02-15-2012, 01:21 PM   #90
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ok thats what i thought. is a flash detectable or would you have to reprogram the ECU back to stock?
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      02-15-2012, 01:26 PM   #91
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back to stock is the safest approach. All the major tunes have a history of being invisible to dealers.
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      02-15-2012, 01:27 PM   #92
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Quote:
Originally Posted by holmes011 View Post
ok thats what i thought. is a flash detectable or would you have to reprogram the ECU back to stock?
Yes, if you take it to the dealer with the tune installed they can detect the tune so you have to uninstall it. The Cobb flash is supposedly undetectable once removed, i don't think any of the other common flashes can be removed at home.
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      02-15-2012, 01:28 PM   #93
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Originally Posted by mithiral67 View Post
back to stock is the safest approach. All the major tunes have a history of being invisible to dealers.
+1

with COBB you can do that at home
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      02-15-2012, 01:28 PM   #94
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Originally Posted by rader1 View Post
Yes, if you take it to the dealer with the tune installed they can detect the tune so you have to uninstall it. The Cobb flash is supposedly undetectable once removed, i don't think any of the other common flashes can be removed at home.
you beat me to it
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      02-15-2012, 03:09 PM   #95
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Heh, I wrote this original thread when I still had a Procede. My, times and facts changed quite a bit.
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      02-16-2012, 04:10 AM   #96
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Heh, I wrote this original thread when I still had a Procede. My, times and facts changed quite a bit.
After having run with the AP for a few days, I noticed that it didn't seem to be load targeting only: The maximum boost in stage 2 + FMIC aggressive stayed constantly at 18.5psi in spite of the arctic temperatures (minus 8 degrees Celsius) at that time. COBB seems to be boost targeting as well, which somewhat contradicts what I previously thought about how flash tunes operated.

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      02-16-2012, 06:39 AM   #97
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Yeah I have experienced this as well, but my temperatures have not been that extreme. I have seen a peak of 18.5 of boost consistently whether it is 80+ degrees fahrenheit outside or 40 degrees outside.
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      02-16-2012, 07:30 AM   #98
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Quote:
Originally Posted by Alpina_B3_Lux View Post
After having run with the AP for a few days, I noticed that it didn't seem to be load targeting only: The maximum boost in stage 2 + FMIC aggressive stayed constantly at 18.5psi in spite of the arctic temperatures (minus 8 degrees Celsius) at that time. COBB seems to be boost targeting as well, which somewhat contradicts what I previously thought about how flash tunes operated.

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Yep, stage 2 doesn't use the stock logic.
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      02-16-2012, 10:26 AM   #99
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Stage 2 has less authority to increase boost because you don't want to end up running 25 psi even in the best of conditions... lol

Stage 1 doesn't matter so much because it doesn't run that high boost to begin with.
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