Quote:
Originally Posted by BMW-RaceR
"In 2011 BMW released turbocharged 1.6 Prince engine [8] (called the N18 engine for the Mini Cooper S and called the N13 engine for BMW applications)"
Cooper S is underrated, and so is the big brother "John Cooper works".
328 and 335 both share the N20. Both of them or underrated.
I see no reason why the 118I should not be underrated in about the same way as all the others.
Seems like all BMWs twinscroll engines are underrated.
You already have 116I and Cooper S dyno results. You do the visualizing of the 118I. Im guessing Cooper S have 2-5% less drivetrain compared to a RWD car..
BMW 116I : 136hp@4400rpm - 220nm @1350-4300rpm (129g CO2)
BMW 118I: 170hp@4800rpm - 250nm@1500-4500rpm (134g CO2)
Cooper S: 184hp@5500rpm - 240nm@1600-5000rpm (136g CO2)
Ofcourse, would be nice to see real dyno, or hear from people who have tested both 116I and 118I.
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Extremely underrated.
I recently tuned a friend's 118i via an RPM based tuning box. Here are the before / after results:
Note that the Power figure captured is the estimated HP at the crank. On wheel there is an estimated transmission loss of 15%. Torque NM figure remains the same.
As you can see, even before tuning, the stock engine produced a staggering 320nm peak torque, abeit at a higher RPM. After the tune, we improved the peak torque to 360nm and smoothened out the curve considerably.