Quote:
Originally Posted by clarence
No, they're not throwing them out, merely badging them as 20i if it cannot attain 28i's level of performance. That's the only reason why no tuner can attain 28i's level of output using a 20i if all parts are identical.
BMW has been making 20i version of the N20 since 2011, so they're wasting nothing.
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What you're saying makes no sense. BMW does not dyno every single engine that comes off the production line. They do a driving simulation at the end of the assembly line on something that resembles a dyno, but the car is already badged at that point. The 180 HP engine is designed to output 180 HP from start to finish.
The reason tuners can't get the same output from the 180 HP version as they do the 240 HP version is because of some difference in the engine that BMW put there. It may be intake related. It may be exhaust related. It may be turbo related. It may be Valvetronic related. It may be head flow related...
I don't know, but I do know that there's no way that BMW's engine assembly line suffers from that degree of manufacturing variation.