Quote: Originally posted by unikarl on 16 December 2004
Can you not get a tuning box for about half that price? Im sure I saw something on ebay recently that looked OK and was about £200.
Yep tunning boxes are another tunning option they extend the fuel injection later into the cycled but can do nothing else.
Usually proper tunning boxes cost about £250~£450.
Anything cheaper is often just a resister whch fools the computer to think the fuel is hot therefore less dense so the ecu injects more fuel than it would if it knew the proper temperature so you get more power. This isnt ideal as it can lead to loads of black smoke but its an option. You can make this type of tunning box for a few pence all you need is a resister.
Is this for your Leon? if so the resiter trick is a common one have a serahc on the Golf forums and there boud to have a stickly on it saying the values they recomend before you get black smoke etc.