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Old 23-06-2011   #1
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What is a remap and why might I want it?

Remapping – an introduction from ExpertTuning

Is remapping for you?

If you want a vehicle that is better to drive, more tailored for your purposes and, in most cases, more economical, the answer is yes!

What does remapping do for you?

That’s the most important question. The answer is that it does different things for different people. While some want all-out power, others want fuel economy. Some want engine characteristics modified for a better drive, to get rid of lag and flat spots, or to improve reliability of response pulling out of junctions or overtaking in country lanes. Others might want it for better pull for towing caravans or heavy loads. Remapping can do all or any of these, and one thing that is guaranteed is that it will make you enjoy your vehicle more, no matter how good you think the ‘factory drive’ is, and no matter how much power you already have.

How does remapping work?

A remap re-writes the data in the ECU (Engine Control Unit) to modify manufacturer’s setting. It adjusts dozens of parameters and functions including fuelling, turbo, throttle etc.

What could you expect from your vehicle?

The best way to find out is to call us at ExpertTuning because every engine is so different, but in general all cars get better driving characteristics and more power, and most also get better MPG. Turbo petrol engines get better results than non-turbo petrol engines and turbo diesels get the best results of all, particularly in terms of economy improvement. Don’t let that put you off of having non-turbo petrol engines done though. While we can’t guarantee huge power increases or fuel savings on these, the responsiveness and low down pull can still make a big difference to the drive and is certainly much better value than some of the expensive air filter upgrades.

Is my engine up to the modifications?

A good remapping company has a responsible attitude to remapping. It will only remap within known safe tolerances for any given engine. While it may be possible to add 50hp to an engine for example, a good remapper may only add 30hp if that is the safe limit. Of course, if someone wants a car race-prepped and accepts the engine is going to wear faster (just like tyres might only last one race) then it can be done. Most drivers, however, want to know their engine will give a long and healthy service just like it would before a remap. So long as your engine is in good condition and you are going to maintain it properly you have nothing to worry about.

How do I know if the remapper is good?

Find out what equipment they use. Equipment such as the Kess2 from Alientech and CMD from Flashtec is expensive professional equipment designed to look after the safety of your valuable ECU during the remapping process. Not for nothing does professional equipment cost £ thousands while you can get a cheap tool off e-Bay for under £100! Are their maps written individually for every car or just ripped off of a CD full of ‘similar’ maps that could harm your ECU and engine? Your ECU is individual to your car. It contains not just the standard factory map, but also vehicle specific data including your VIN number, immobiliser data and important bug fixes that may have been applied by a dealer early in the life of your engine. A cheap and cheerful remap offered by someone using database maps could prove to be a hugely expensive mistake because none of this information will end up going back onto your ECU with the new map!

Why doesn’t the manufacturer do what a remapping company can do?

Many reasons.

Marketing; where exactly the same engine is sold with different maps just so the manufacturer can offer cheaper base versions or more expensive ‘tuned’ versions, or where an engine is shared by different manufacturers that don’t want to offer the same power.

Usage expectations; some countries only supply low grade fuel, or the manufacturer expects maintenance to be poor, so they will detune an engine to ensure it will run OK even though it uses poor fuel, may be badly maintained and hardly ever have an oil change in its life. The result is that you suffer from this one-size-fits-all decision even though you have access to higher quality western-European fuels and maintain your car well.

Government testing; government testing for emissions and fuel consumption are not done in ‘real world’ scenarios, yet manufacturers tune their cars for best government test results rather than best ‘real life’ results. What you end up with is poor throttle response, lag, lower fuel consumption and a poor driving experience because once those government tests are done, the manufacturer cannot change them back to the optimum settings for real-life use.

Hopefully that’s given you a bit more understanding of what the remapping enthusiasm is all about, and what it can do for you. If you have the slightest interest in….

- More power
- Better MPG
- Better responsiveness
- Easier towing
- Easier hill-climbing
- An all-round better drive

…. then a remap could be just what you are looking for.

If you’re going to do it, then do it now, rather than waiting and saying, like so many do on their test drive, ‘I wish I had this done years ago!’.
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Old 23-06-2011   #2
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Re: What is a remap and why might I want it?

not forgetting soon a remap will be an mot fail

The car/light goods vehicle MOT test is about to change – the European
Commission has changed the Directive that covers it. We take a look at
when these changes are likely to come into effect and what they mean
for MOT testers.
Britain has been testing vehicles
under the MOT scheme for 50
years now. Last year, the European
Directive covering the MOT test
was updated and revised by a
modern version called 2009/40/
EC. This was then updated by
2010/48/EU, which was ratified
on 5 July this year.
The new Directive keeps the EU
minimum 4-2-2 test frequency but
adds a number of new elements to
the British MOT test. The Directive
anticipates all test changes being
in place by 1 January 2012, and
a common European approach
to test certificates in place by
1 January 2014. So what is VOSA
doing to introduce the changes?
In terms of test frequency, in
mid-July the coalition government
confirmed that it intends ‘to look at
the issue of MOT test frequencies
later this year’. VOSA contributed
statistical data to inform the last
review in 2008, and we expect that
our computer system and the data
you have entered will be utilised
again in much the same way.
We expect to hear more details of
the government’s review proposals
later in the year.
As far as changes to the test
content are concerned, VOSA
has already been analysing the
requirements of the new Directive
and working out how to implement
them. We started this earlier in the
year by talking with representatives
of the MOT trade at our regular
Trade User Group and VTS
Council meetings. Both VOSA and
the Department for Transport (DfT)
are keen to ensure that any
changes to the test are introduced
in as practical a way as possible,
keeping the burden on the trade to
a minimum and ideally keeping the
changes cost neutral.
In many cases, the changes
shouldn’t necessarily lead to an
increase in average test times.
A good example is the malfunction
indicator lamps on the dashboard
that indicate defective electronic
power steering, electronic stability
control and secondary restraint
systems. Testers already check the
dashboard for other lamps, so no
extra time would be required for
this addition to the test.
Electrical wiring and batteries are
now included in the test’s scope,
but testers already check the
vehicle structure where wiring is
secured – often along the same
routes as other testable items,
such as brake pipes in the engine
compartment. So again, this
doesn’t look like an additional
burden on the tester. In the precomputerisation
days, testers often
(wrongly) failed vehicles for insecure
batteries, so they must have been
looking at them then! Now, it
means that when we implement
the new Directive, vehicles can
legitimately fail for battery insecurity,
for no extra tester effort.
http://www.dft.gov.uk/vosa/repositor...Oct%202010.pdf
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Old 23-06-2011   #3
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Re: What is a remap and why might I want it?

Just to se the record a little more straight, the only reference to anything close to remapping in the document referred to by Dave is the following....

"Other items – such as headlamp bulb and unit incompatibility, headlamp levelling devices and illegal engine ‘chipping’ – will need further thought before we can get a workable solution for ..."

I don't really think that really justifies the claim that 'remaps will soon be an MOT failure'.

There's no definition of what 'illegal chipping' is, there's no reference to how an MOT tester could perform the test and there's the FACT that every ECU will likely have been modified since it left the factory what with dealer installed updates etc.


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Old 11-07-2011   #4
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Re: What is a remap and why might I want it?

How much is a remap?
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Old 11-07-2011   #5
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Re: What is a remap and why might I want it?

Quote Originally Posted by ExpertTuning View Post
There's no definition of what 'illegal chipping' is, there's no reference to how an MOT tester could perform the test and there's the FACT that every ECU will likely have been modified since it left the factory what with dealer installed updates etc.

all oem maps including dealer installed updates, will be held on the vosa main computer, mot man will have a box that connects cars to his mot computer that talks to main vosa computer
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Old 14-07-2011   #6
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Re: What is a remap and why might I want it?

And don't forget to let your insurance company know someone's been twiddling with the onboard 'puter.
It might only be the tiniest thing but if you have a prang and they start sniffing around... Any excuse to get out of paying.
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Old 17-08-2011   #7
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Re: What is a remap and why might I want it?

hi there was just wandering if anyone could tell me if they have heard of a
" titan super chip" fully remappable apparantly?? as i dont no much about super chips so not sure if this is a good one to buy for my punto gt turbo??? thanks
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