Getting the old girl remapped... I should have learned my lesson by now...

Timdon said:
Nictrix said:
Timdon said:
Rob sends my origanal map to quantum and the file writers send him the updated map too install using the perameters he sent them .
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So what parameters are these?
Do they adjust if an exhaust or air intake is changed? What else?
Surely without going on a rolling road all they can do is guess what to change as they do not know what needs changing.
For instance most bikes run rich straight from the factory. Mine now does not as the map has been adjusted to suit.
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Sorry it's all too technical for me , maybe I have been sold snake oil but the car is definitely quicker and more responsive . I did look at the Cobb v3 $900 and did some research and decided on quantum .
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You have definately not been robbed but there is a better way of mapping engines than just changing the map for another one that somebody somewhere made for someones car. You dont just want more power, you want a better tuned engine. No point it being quicker if it starts to wear engine parts quicker than it should.
The same can be done for bikes. You can download generic maps from Dynojets own site with various different maps set for various exhausts etc but these are just as far out as the standard factory map.
Every engine is different and to be at its best needs to be mapped properly.
 
Yes I agree but the remap feels good to me ,I'm happy with the remap ,and did research the same engine can go from 305bhp to 350bhp
 
Most of these tuning shops are just applying a standard tuned base map to the car. Very few if any will actively be tweaking parameters on a per car basis, even less will actually go into VANOS tuning or any of the other tables available.

Tuning on a dyno isn't perfect. Unless the dyno has some pretty serious fans setup you are not really emulating the true conditions the car will experience on the road. Some little portable fan wheeled out infront of the car is just not sufficient. You need to be tuning the car on the road with real airflow and real engine load to have any idea how the tune will behave in the wild.

Dyno numbers also vary so much between dyno makes and dyno operators that any numbers they spew out for your car are incomparable to any other car tested on another dyno. You are better off comparing the boost/timing or 1/4 mile times.
If you really want the best tune for your car you have to use MHD Flasher and get a custom tune done via log data taken from road driving.
MHD is now capable of writing custom logic into the ECU, the first modification has been load by gear which is essentially limiting the boost in lower gears to minimise wheel spin, more changes are also being worked on.
The ECU in the N54 is complicated and is not fully uncovered. Recently there has been a lot of discoveries regarding new tables and better understanding of existing ones. These tuning shops are still just using outdated canned flash files with dated software.

I'd love to see some log data from a car tuned by one of these shops promising 400hp. I certainly wouldn't want to ever run a tune without seeing a log of the engines operating at high load on a regular basis!
If you are running a tune on a car with a weak HPFP you could be running seriously lean at high load and the ECU has no safety measures and warnings in place to deal with it. That's why people are so fanatical about log data in the tuning scene.
 
Well we're half way there... The map data took way longer than expected to read and the weather turned nasty also (it was done at my home).

So I've left the map with them to alter and they're coming back on Saturday to apply it.
 
Update:

Wish I'd never bothered...


.. During the write I got a call. The call connected in the car (Bluetooth).

This stopped the write...


... And bricked the ECU.

Car is dead currently and they're attempting to recover it but it's not looking good.

I can't tell you how I feel.
 
Maniac said:
Update:

Wish I'd never bothered...


.. During the write I got a call. The call connected in the car (Bluetooth).

This stopped the write...


... And bricked the ECU.

Car is dead currently and they're attempting to recover it but it's not looking good.

I can't tell you how I feel.
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Nightmare,

So a BT call somehow interrupted the writing of the new map?

Good luck recovering it :(
 
They've removed the ECU to take it back to the workshop.

I await an update. Meanwhile I have a large lump of metal blocking my drive.

Gutted.
 
Maniac said:
Update:

Wish I'd never bothered...


.. During the write I got a call. The call connected in the car (Bluetooth).

This stopped the write...


... And bricked the ECU.

Car is dead currently and they're attempting to recover it but it's not looking good.

I can't tell you how I feel.
Click to expand...

Hello Maniac

What a pain, I know how I would feel in this situation .. just shows you how something like a phone call via the cars blue tooth system can corrupt this procedure. I know this does not help you but at least others who where planning this now have some more info for precautions etc when others try it.

I am assuming that they are trying to recover the code over the phone / bluetooth? or could they try a direct connection to the port, or maybe you may have to send the ECU to them.

What would the worse case scenario be ? if all else fails could BMW complete a fresh ECU flash install on their diagnostic machines ? Just trying to think how to help you .... I would lend you my ECU but I have the 35is and car still under warranty so a no go on that front.

hope all goes well .. keep us updated
 
At worse it will have corrupted the Eeprom...


I wouldnt have thought it too hard to flatten the chip and reload the OEM map....


Still a pain in the arse that wasnt expected....
 
That's not good. I would have thought they would have known it's recommended to disable any bluetooth paired devices and turn off auto-lights, air conditioning etc. so the car is in a low load state. ESS include these recommendations with their ECU flash system.

Hope you're back up and running soon.
 
I'm sure they'll be able to restore a bog standard map and go from there.
It's not as though they've fried it fortunately.
 
ronk said:
I'm sure they'll be able to restore a bog standard map and go from there.
It's not as though they've fried it fortunately.
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That makes sense.

Hope you get it sorted - try and think happy thoughts. :? :)
 
ronk said:
I'm sure they'll be able to restore a bog standard map and go from there.
It's not as though they've fried it fortunately.
Click to expand...

Depends if they have bricked the chip i would have thought.. Still not irretrievable but will have to be lifted off the board instead of accessing through the diag port.....

Skilled lads can do it easily and with little intrusion... I have seen to right disasters too,looks like a knife and fork has been in the ECU....
 
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