Quote:
Originally Posted by BMW-RaceR
Q1- How can BMW underrate their cars that much?? (Im not complaining!  In Norway we have HP taxes among others)
Q2- How can a 116I become a 118I?
Q3- What about getting 118I performance from a 114I?
Q4- When looking at ECU tuning there is typically about 10-20% more power to be gained from stock depending on where you are looking at the power curves. (some places uses higher numbers for turbo engines) That percentage is usually the same when starting on a 114I, 116I or a 118I.. Why?
Read a Norwegian review of the 114I. They said the engine was surprisingly strong for its numbers.... I wonder why.. ;p |
Although I think the dyno graphs above are a bit on the unreliable side I'll try and answer the questions.
A1- They need to clearly define outputs and price points hence 75kw, 100kw, 125kw, for the 114i, 116i and 118i, all outputs derived from an engine which is only a little different than the Cooper S.
A-2 By changing a £300 downpipe and loading the same map as a 118i into the 116i's ECU
A-3 I don't think anyone has checked part numbers on the 114i yet, it may have a smaller turbo. Can't see it though it's cheaper just to build one engine and sell it at differing power outputs.
A-4 Tuning boxes do not alter the engine map they just change the inputs into the ecu so a percentage gain is all they can do. A proper remap should give the same results on a 116i with down pipe and a 118i, probably pushing towards 200bhp.
Cheers
Lee