What is remapping?

Recalibration of your ECU (ignition timing, fuelling etc). Fundamentally, the ECU contains huge tables of data known as maps. Different input signals from various sensors on the car determine which values are taken from the map as outputs.

Just get it done and enjoy a few more BHP and worse emissions / reliability!
;-)

 

re-mapping means get sat nav fitted and drive outside london

 

towards Leeds you big load of southern woosies

 

Sy

I doubt very much that you will be able to have your ECU remapped, you can buy different chips (QV do them) but these won;t be optimised for your changes. To be honest the differences you'd see in terms of performance would be minimal from the change to your Cat's /Exhaust, there might be a few more bhp avaialbe from taking the ignition timing a bit closer ot the wire but you'd have to be sure of good quality fuel at al ltimes to avoid detonation

 

'Re-mapping' is one of the excuses suggested by Blackpool for their dealers to use to try to justify big bills incurred trying to make their 'cars' run properly - it was suggested to you as a wind-up in gratitude for your recent efforts on Pistonheads & banning TVR's from the Poseur's Run

 

I knew what re-map was and I am a girl.

 

are you thats a shocker

 

witk your knowledge of cars did you contact the RSPCA ?? about the cat

 

Modern cars will have two lambda sensors, before and after the cat. When you decat a car, the two sensors would not read the proper difference (i.e. the lambda sensor after the cat should read 'catalysed fumes') and as a result some ECU's will assume a fault and reduce engine power . I know that BMW tuners, when they replace the original cat with a 100cell race cat, remap the ECU to accept the new hardware.
Other then that, ECU remapping can sometime bring few more BHP by optimising ignition timing, fuel mix etc. In my opinion, most re-mappers claim much higher BHP gain then what is reasonable to expect on normally aspirated cars (turbos can easily tweaked for more power by increasing the boost).
That being said I am not sure the 348 is modern enough to be susceptible to the lambda reading issue described - I doubt it even has modern, flushable ECU, hence the talks about chipping it (i.e. buying a different chip).

 

As above, although the "by increasing boost" bit isnt necessarily true. Most N/A cars will feel little gain from an ECU remap, however, a turbo F'car will feel some significant gains.
These days it is possible to fit ECU's that relieve the need for AFM's, and can store up to 40 different maps, which at the drivers availability can run different scenarios depending on the situation. You dont necessarily have to run highrer boost to gain more. Forced air induction and better fueling can improve torque and also give rise to more available boost.
On the N/A cars, just better induction, free flowing exhaust with racing cats, and the fueling tweeked to cope with advancing the timing and some higher lift cams will certainly see a fair bit of power gain, and surprisingly, a better earthing system will also see gains( although very minimal)
and a wide range closed loop lambda sensor will make good of the lack of cat
And the fun bit is that a tuned N/A car will make a far better sound than a boosted one.

 

http://www.motorsport-developments.co.uk/pages/Livemappingextract.htm

this page might help,,, and im sure that if you have any problems in understanding this topic, give stu a bell fromt eh comapny above!

HTH

 

You've remapped your bod avatar haven't you

 

I can't say that re-mapping was a benefit as I prefered the previous results (although the output was a little rough).

 

A pair of performance chips would probably be nearly 500 notes. Don't bother in my opinion, the 348 aint' got secondary oxy sensors like the 96-> 355's so the ECU is none the wiser about the exhaust.

 

In my limited knowledge I don't believe that you need nor will it release much bhp at all, by remapping purely as the cats are out. The rear sensors are 'tricked' when the bypass pipes are installed into beleiving that all is well (not sure how this is done but ask Karl at Verdi or Manu at Scuderiasystems)..... also I believe it is best to get the chip sorted for your exact setup. I ahve the Gruppe M chip which was done for the fact that i ahve more cooler air going into the engine with the induction unit so they remapped for that (ie/ increasing fuel map) and becasue of the better breathing of the engine.

To be honest a sports exhaust and cats out are more to do with noise and less worry over manifolds / exhaust cracking due to excessive cat heat thatn really adding meaningful BHP in my experience. Changing the chip map is really something you can do without changing exhaust or anything else if you wanted to do so......just depends on what you want to spend and if you really want someone to mess with your engine.

Best remapping ever doen IMHO is when the car is remapped whilst on a rolling road.....albeit very noisy..... ;-)

 

its something orienteers do mate

 

I had my Audi S4 remapped by AMD in Oxford on a rolling road whilst they changed the exhaust and cats for a Milltek sport system. The result with just those three things was an increase in bhp from 344 as standard to just over 400 and an increase of 40 lb in the torque. Reliability has not been decreased (yet) Although I do have it serviced more reguarly.

It was not a cheap upgrade but has made the car so much better in my opinion.