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Old 10-01-2014, 09:35 PM   #7 (permalink)
ever_green
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Join Date: May 2011
Location: Toronto
Posts: 264

gueff - '19 Mercedes Benz A250 4MATIC AMG
90 day: 30.55 mpg (US)
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Thanks I just bumped up the line pressure using the drivebywire system. Basically you use higher scale for requested torque numbers while rescaling throttle settings to match previous setup. This tricks TCU into thinking that full throttle is requested at part throttle and so it shifts fast similar like in full throttle. Shifts are very quick. ~400ms vs 600ms stock from logs and the converter no longer hesitates when locking/shifting.

I'll post a vid tomorrow but people think it shifts like a DCT and torque converter is virtually locked at all times unless exceeding 40% pedal angle. It gives a woody feel to driving experience but more controllable. If anything customers can switch to sports or sportsharp mode to get more unlocking.
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