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      07-06-2017, 10:51 PM   #53
SeanWRT
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Drives: E90 M3 & F87 M2
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Quote:
Originally Posted by BAN_M2 View Post
So is it or not achievable?

Initially it looked like it wasnt possible to hit 400whp and ~450tq on stock turbo. But with FBO and perhaps a fuel system upgrade to handle the push might be possible? Obviously with a custom tune.
With stock turbo, fueling isn't really the bottleneck until you use ethanol.

400whp requires 350lb*ft@6000rpm. That's all about how octane holds up boost and IAT.

Realistically, 50-60whp is about as much as you can expect to gain from flash tune without using meth and ethanol. To hit 400whp really depends on the baseline number you use.
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