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Originally Posted by Bimmer13
Thanks for the replies. Makes sense however a boost gauge is more than a novelty. The 135i can't be in FULL BOOST the entire RPM range. It would be helpful if I could visually see when the Turbo's are in full boost.
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Well without a gauge you won't have the actual output number but according to BMW these engines make maximum torque from 1500rmp (1200 if n55) to the 5k range before power drops off. So theoretically it should be in full boost between those rpm numbers. This Is also why you can't quote feel the turbo. With full torque/boost output starting at such a low rpm there's really no time to anticipate it. It's just past idle basically