All Things Mk5 > Mk5 General Area
disappointing performance continued....UPDATED after a day at MRC Tuning
duncan:
--- Quote from: neg on April 02, 2009, 10:32:02 pm ---Good point but as stated most well known tuners (not sure for all) replace the map on the car with their modified version so this would rule it out. I know Revo always work on the latest released map - e.g. when mine went in for the ECU update I was actually already running it but they didnt know so I let them apply it for piece of mind as I was under warranty.
Glad its all sorted though :happy2:
--- End quote ---
from my understanding after speaking in depth wtih MRC Tuning, Generic maps like Revo / apr / GIAC etc do make big changes to the stock map but dont adjust everything, it was only when the changes were made to my custom map that the fueling sorted it self out.
I think your right about the new release of software not being the cause of the car running rich.
to be honest am kind of quoting what ive been told / understand from the conversations i had about my car.
the APR map i had on the car didnt make changes to some of the stock settings on the ECU, it was only when he put his map on, data logged then changed the custom map for my car to change its fuel ratio that the car stopped running rich at high revs.
only issue i have with the car now is that i feel the brakes arnt quite up to it after the remap as the car is that much faster!
also am getting a rubbing / grinding when im hard lock going forwards and backwards - not too worried about this as car is underwarranty so can get it fixed easily
neg:
I think your is a little different to the 'norm' so you needed a completely custom map with tables being altered that normally dont need to be.
ub7rm:
The steering noise is most likely the steering rack - all to common a problem.
I'm not an programmer but I would imagine the way most remaps work is by altering stock setting by some delta, not overwriting the absolute values. And almost certainly not overwriting the entire map - this would be a huge undertaking by any tuner, they most likely leave the vast majority of the code unchanged, and just tweak the bits that they have to. So if your 'stock' map is off, the remap will only increase / decrease that value by some delta. An off the shelf remap maybe doesn't play with the parameters that are 'wrong' with your stock map which was why it was only addressed by the custom remap?
duncan:
--- Quote from: ub7rm on April 03, 2009, 08:19:45 am ---The steering noise is most likely the steering rack - all to common a problem.
I'm not an programmer but I would imagine the way most remaps work is by altering stock setting by some delta, not overwriting the absolute values. And almost certainly not overwriting the entire map - this would be a huge undertaking by any tuner, they most likely leave the vast majority of the code unchanged, and just tweak the bits that they have to. So if your 'stock' map is off, the remap will only increase / decrease that value by some delta. An off the shelf remap maybe doesn't play with the parameters that are 'wrong' with your stock map which was why it was only addressed by the custom remap?
--- End quote ---
very well put
i think thats what i was trying to say but couldnt quite get there!
well so far no probs with the car and the remap - still getting used to the power and am being taken by suprise every time i put my foot down
does definitley make me want to upgrade my brakes and suspension
curiousity is making me want to take it to a rolling toad but i dont want to be annoyed if the figures arnt there, am more than happy with the performance so there is little point in my book...
will wait until there is a group buy thing on!
john_o:
tbh I have no idea how much code is changed for each remap. Although consider this...
APR remap has an OE like map which is APR's interpretation of the original VW map.
Plus VW own the orginal source code and protect it , so its an interesting point as in theory you cant 'copyVW map' and change a few params....
My limited understanding is that there can be 2 types of tuning , 1) the (relatively) easy way by modifying limited parameters as the ECU seems them or 2) taking the whole code apart and building your own.
Interesting talking point :happy2:
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