how safe is it to upload a remap to your own car?

hough

Road Burner
Points
67
Location
Poole, England
Car
VW T5 swb 2.5tdi
hi has anyone on here ever download a custom remap file and uploaded it them selfs if so how safe is it and are these files any good, as in I know the remap is not gona be a Rollin road mapping???
 
If you buy a handset from a company for instance and plug and pay it straight into your car or a disc etc to go in your laptop that plugs into your car then fair enough and it's quite safe (assuming it's a reputable company). You want to know for definite that the map has been made specifically for your car and has had a lot of testing to make sure it's right etc.
If it's just a random map from a random person who hasn't put that map through rigorous testing processes, using said car, then it could in theory completely destroy your engine. The parameters may not be set correctly and therefore allow your car too many revs, too much fuel, all sorts of crap can and will go wrong.
 
The danger isn't in uploading the map it's the map itself

It depends on your state of tune - the higher the more need for an accurate map

To get any meaningful replies you need to give us the make and model of your car and current engine spec

Personally I understand a custom map to mean one done for your car on a rolling road or better still done while driving.

A custom map isn't somones guess as to what Will work on your car

Maybe we mean different things when using "custom"

Assuming we do - if your car is standard or close you may well get an improvement loading a different map but it would be far better to get your car properly mapped
although this will cost more it should be far safer and a better drive

Maybe you just used the wrong word
 
Last edited:
There are a lot of tweaked generic maps out there. Some are ok but others create issues as they have not been fully tweaked and tested. It takes a lot of R&D to get a map sorted so I'd tend to leave it up to the guys who know their stuff rather than start fiddling with it myself.

I suspect that reputable tuning companies will be selling downloadable maps in the near future allowing the home user to apply a map to their car.
 
I suspect that the bigger market will be for pseudo custom maps. Let me explain:

You lift the ECU map from your own car using whatever device is appropriate.

This map is sent to the remap specialist as a raw binary file.

The tuner then applies what are effectively generic changes to this file, perhaps taking into consideration some special requirements that you have (eg. sharpening the pedal response curve; enable cruise to be engaged in third gear as well are 4th, 5th, 6th).

The tuner then sends the new binary file back to you for you to upload yourself.

The BIG benefit of doing things this way is that the parts of the ECU code that identify the ECU to the car are not altered, whereas with a complete generic overwrite they will be.

OK - with SHA and MD5 checksums starting to be used to prove the authenticity of the car's OEM factory map it's possible that it WILL be detectable if someone is wanting to check the car for originality.

There are other flaws of course - for example - the tuner has no opportunity to test drive the car and check that he/she believes it a suitable candidate in the first place.

It's a step in the right direction, but maybe Too Little, Too Late ?????
 
Last edited:

Similar threads


Please watch this on my YouTube channel & Subscribe.


Back
Top