Found this post from several years ago in the E90 forums.
https://www.e90post.com/forums/showp...18&postcount=3
Quote:
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1. BMW throttle has a delay from 'foot press' to 'car go now', although it is tiny. If you have ever driven a higher powered 'cable to throttle' system, it will feel like something is off. Most obvious for me is when attempting to heel&toe where what used to be a blip on my old car, is now a considerable press and hold on my e92.
So in my opinion if you want to get rid of the 'lag' in the throttle (which is 100% a real thing) then reports of people who actually own a 'pedalbox/sprintbooster' is that this product achieves just that.
For me that is worth the $200-300, because the lag annoys the shit out of me. However as most 'Einstein's' who don't actually own a pedal box will tell you, 'just press the accelerator more' for the same effect! WRONG, pressing the accelerator more, takes more time. Whilst this is irrelevant in say a drag race, where your foot is flat to the floor anyway, in a heel&toe situation a blip on the throttle is all you want, then having to press the accelerator less is a win.
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I just bought the pedalbox, because it seems to have more settings and reviews claim it to be slightly better made. I will let you know how it goes.
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I have never used a sprint booster type product, but I thought it was interesting that this guy bought one specifically because of issues during heel-toe.
Other thoughts, does resetting the throttle adaptations do anything on a manual transmission car? Are there coding settings for the throttle and is the 135/1M coded differently?
Or is it definitely a brake/accelerator interlock buried somewhere in the DME?