Originally Posted by m500dpp
was discussing tuning with the garage today and their view was that the TD5 can give a whole lot more performance, but at the expense of longevity.
Makes sense if the engines can produce more power etc, why dont the manufacturers do it?
First of all welcome to the Landyzone/Fight Club (I saw your post on another thread where a newbie was getting the unfortunately normal mawling).
Td5's do respond well to an ECU tune-up but I would argue that it doesn't go against their long-term reliability, unless you were to use the max power 100% of the time. If you do that with any vehicle in any state of tune you'll hammer it, won't you.
I've had a couple of TD5's tuned up and they both drove well, smoothly with sufficient power to cover long distances easily. However, this did not give me 3-5mpg more. Think about it that's roughly 12-18% better mpg - no way.
You also pose the question" why don't the manufacturers do this re-mapping" - well they are bound by a number of constraints like all car manufacturers - profit, emissions, serviceability etc etc. We as end-users are not, with the exception of being able to pass an mot.
If you want to improve the fuel efficiency of your vehicle here's a few tips before you set off to France:
1. Replace your air filter, no matter how new it is;
2. Do an engine oilchange
3. Do a De-EGR mod - use the search button
4. Do a De-Cat mod - ditto
This really will optimise your mpg.
The key to longevity is regular maintenance, and I don't mean as per the schedule which is frankly rubbish. I mean for example, changing engine oil every 6000mls.
Afterall, the oil will cost about £35 and you can do it yourself in twenty mins - so why wouldn't you?
Whereabouts are you coming to, in France? I'm in the Limousin, just south of the centre of the country.