The modern diesel engine has come a long way since the old smelly noisy almost agricultural units of years gone by. With the advent of high compression engines, turbo chargers and direct fuel injection at phenomenal pressures we have a range of diesel engines that out perform thier petrol counterparts and return better fuel economy.
The big plus is that with a simple remap you are able to dramatically increase the performance and also generally get better fuel economy.
We look at all aspects of diesel engine tuning and suggest that you join our forum for more information about the world of high performance diesels.
We wish people would stop using stage to describe a tuning option or plan but while they do we’ll define here what we mean and expect when we talk about the term.
We get asked so much about this that we wanted to spell out what we mean and most car modders mean when talking about stage 1, 2 or 3 remaps and mods. We look at the various stages of remap available and the mods that would work best on stage 1, 2 and 3 upgrades. Each level of remap carries risks and drawbacks so we will outline them here.
From a diesel perspective, anything that isn’t turbocharged is a waste of time from a tuning point of view. Similarly, anything that isn’t using electronically managed direct injection is a pointless tuning proposal so we are somewhat limited to modern Turbo Diesels.
Get rid of those two ointment bound flies and things get more interesting
Gearbox – Lower ratios give better acceleration times and lower fuel economy. Six or seven speed boxes are better matched to modern engines.
Most street applications are closer 1st and 2nd gear ratios for that off the line 0-60 boost or for the fast exec a lower 2nd and 3rd ratio give improved overtaking flexibility and 30 – 70 mph acceleration with a high 4th and 5th gear to give motorway fuel economy.