Thread: E53 ECU Tuning
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Old 08-07-2019, 10:09 AM
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crystalworks crystalworks is offline
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That's me saying that I would certainly use a tuning service. With my experience tuning a turbo 4 cylinder I would hate to have to try and tune for all the technology in modern BMW's. I had a hard enough time tuning the idle control valve for smooth idle with AC on, AC off, electric fan on, electric fan off, and all combinations. And at any ambient air temperature. I couldn't imagine trying to tune vanos, valvetronic, fly by wire throttle, etc.

Tuning a 4.4i without other mods isn't going to net very much HP under the best of circumstances. Maybe 5-10hp (WAG). But I'd stick to Dinan, Turner, etc to do my tuning for me.
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