Recently, I came across the webpage of a tuning shop where the shop claims that by doing chip tuning they can simultaneously achieve superior performance and less fuel consumption (based on how they framed the description on their site).
Main question: is the above combination doable? They claim that this is possible because higher performance (torque) comes sooner (at lower RPM), so I don't have to whirl the engine that much. (Note: please, do not misunderstand me, I'm not saying they are fake or something, just want to understand whether this double effect is actually possible, and if so, how exactly.)
Additionally, they also say that one should expect the same engine lifetime (they are tweaking the ECU settings within the manufacturer's limits/suggestions). Opinion? (The condition of the engine is what I'd be worried about the most.)
I did take a look at the Wikipedia page here, however, it doesn't seem to say anything about simultaneous positive effects (still, the potential outcomes are combined with an "or" in the leading sentence).
A couple of additional, minor questions:
- does chip tuning also imply modifications for the turbocharger, or only the engine itself?
- could chip tuning result in a smaller number of transmissions (on the long term)?
- could chip tuning mean that I may not have to switch gears (that often) on slopes?
- if I end up visiting the place and asking them to upgrade the engine settings, can/should I ask for a copy (in any form) of the implemented changes (like a list of parameters they changed, either in digital/paper format)? Maybe it would come in handy in the future (e.g., if I want to revert the changes for any reason at another place).
- the car in question is an Opel Astra (series J) with a turbocharged petrol engine (1.4L, 140 HP);
- is a bit heavy and does not have a good performance on slopes (primarily, this is the reason why I'm considering this upgrade);
- the performance gain "promised" by the shop is +20HP and +50Nm.