re-mapping

bigwave2255 · #1 05-09-2011, 07:40 PM

new to this concept and probably not considering doing it but........

as these cars are adaptive both motor and gear box, and if you drive mainly in stop start peak our traffic, wont the car adapt its self to this regardless of wether its chipped or not???

wouldn't you then need to either disconnect the battery or take it out to the country for a serious thrashing before regaining the advantage of the re-chipping???

what is the experience of those who have done it???

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huntertec · #2 05-10-2011, 06:14 AM

My X was remaped about 2 years ago incl' exhaust mods ( 3.0d ) the increase was to be exact 203Kw & 615Nm. That is a dramatic increase from standard and in my view well worth the exercise, as far as fuel economy couldn't care less the 3.0d is still so economical anyway I didn't notice decrease, after the remap the tune will adapt to your driving style ( so I was told ) if you want the full gaf POWERS1 is involved in this field. Note the increase for petrol engines (non turbo) is marginal to say the least.

Weasel · #3 05-10-2011, 08:16 AM

The re-mapping/programming changes what the computer see's as normal, thus changes what it adapts to.

powers1 · #4 05-10-2011, 10:18 AM

The re-mapping or computer flashing is the modification of a specific engine file.The procedure starts with reading this file off ECU (with specific flashing equipment),which is saved for future use.Using the data of this file , engine parameteres(maps) (fuel,airflow,injection,timing,boost,egr,various limiters,torque..etc) are optimised for performance increase and should always take into account,the reliability of engine/transmission parts.These parameteres are altered depending on clients preferences.A new file is created and is then "flashed " to the computer and replaces the original file(which has been safe kept!)

The changes of the re-map are instant and cars with auto transmission will auto adapt to the new file .The car will still continue to adapt itself but now to the new file(re-map).
Just like the standard file ,all will be the same,even if you disconnect the battery.This file is permanent in the computer (like writing to a HDD)and can only be overwritten either by a "mapper" or by a sofware update at the dealer.In this case,a professional "mapper" would re-map the car again at no extra cost.

Isambard · #5 05-12-2011, 09:41 AM

Quote:

Originally Posted by bigwave2255

new to this concept and probably not considering doing it but........

what is the experience of those who have done it???

I've had several cars before the X remapped and swear by it. Funnily enough, I just got my 01 4.4 sport done Monday.

If you don't know BW, its very simple, the bloke just connects the laptop to the car via the OBD port under the dash by the steering wheel, then takes your original file from the vehicle, and saves it. Then downloads the new file. In all this process takes less than an hour. You start the car up, and drive off with a grin on your face wondering why the hell don't the manufacturers do this as standard?!!

Its not like bolting on a turbo, but just more responsive on the pedal, better driveability (smoother progression of greater power) through the rev range-particularly low-mid range, a little more bhp/Nm (approx. 25bhp, and 40Nm).

I have Eisenmann 'race' back boxes fitted which let the true V8 sound through, and now since the map in the mid-range the sound has got even 'throatier' when pushed.

I recommend getting it done. If you do, let us know your thoughts..

Wolf539 · #6 05-12-2011, 10:38 AM

Quote:

Originally Posted by Isambard

I have Eisenmann 'race' back boxes fitted which let the true V8 sound through, and now since the map in the mid-range the sound has got even 'throatier' when pushed.

I'm going to put a deposit down on an Eisenmann exhaust today; glad to hear you're happy with yours!

My mechanic is also recommending a re-map or powerchip; I guess I'm going to have to have him explain the difference between the two as I thought they were basically the same thing?

powers1 · #7 05-12-2011, 12:22 PM

Quote:

Originally Posted by Isambard

I've had several cars before the X remapped and swear by it. Funnily enough, I just got my 01 4.4 sport done Monday.

Its not like bolting on a turbo, but just more responsive on the pedal, better driveability (smoother progression of greater power) through the rev range-particularly low-mid range, a little more bhp/Nm (approx. 25bhp, and 40Nm).

I have Eisenmann 'race' back boxes fitted which let the true V8 sound through, and now since the map in the mid-range the sound has got even 'throatier' when pushed.

I recommend getting it done. If you do, let us know your thoughts..

Now ..why would BIGWAVE have any interest in all this information if he has a 3.0D?

The OP has all the information he needs,without you confusing the thread.

If you want to open a new thread for 4.4 remaps ,do so,but I am sure you will be challenged by many on the 25hp/40Nms you just stated and whether or not its really worth ,bucks for Hp value, for re-mapping a NA car.

JCL · #8 05-12-2011, 12:25 PM

Quote:

Originally Posted by Wolf539

My mechanic is also recommending a re-map or powerchip; I guess I'm going to have to have him explain the difference between the two as I thought they were basically the same thing?

Layman's description. Tuners can feel free to argue the finer points of this definition.

A re-map replaces the map that is within your engine control computer, as Powers says. The map specifies how much fuel to inject or how much boost to allow, depending on variables such as engine speed, air flow, temperature, throttle position, etc. A power chip (often called a 'piggyback') is a chip that intercepts and modifies one or more signals, such as temperature measurements, and sends that modified signal on to the engine computer. The original map stays in place; the modified signal essentially fools the engine which will cause the engine computer to inject more fuel or raise boost levels by thinking it is currently somewhere else on the map.

A power chip can be very inexpensive, but has some inherent limitations. The limitations are that you aren't adding new code within the engine software, so all you can really do is move the computer to another point on the map. With a new map the tuner is adding code, so he can do more (assuming of course that he knows what he is doing).

There are real gains to be made with a turbocharged engine, because boost is the first thing tuners change. With a naturally aspirated engine, it comes down to the air-fuel ratio, so there are minimal gains to be had.

Wolf539 · #9 05-13-2011, 08:01 AM

Quote:

Originally Posted by JCL

Layman's description. Tuners can feel free to argue the finer points of this definition.

I stopped by the shop yesterday and your description was pretty much right on. After a bit of discussion I decided to pop for the remap.

Waiting on my exhaust to be delivered from Germany; should have the project done in about six weeks. Hopefully less...!

Isambard · #10 05-13-2011, 08:15 AM

Quote:

Originally Posted by Wolf539

I'm going to put a deposit down on an Eisenmann exhaust today; glad to hear you're happy with yours!

My mechanic is also recommending a re-map or powerchip; I guess I'm going to have to have him explain the difference between the two as I thought they were basically the same thing?

Go for it! You'll love it too...

This is what sold it for me, check the vid and turn up your speakers!!

YouTube - Eisenmann BMW E53 X5 4.6 is - Race

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