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  #1  
Old 08-06-2019, 05:16 PM
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E53 ECU Tuning

Has anyone DIY tuned/remapped their ECU? Any information on this would be appreciated. I have a '06 4.4i E53. Looking for some modest HP gains via ecu tuning, if at all possible I would like to DIY this or find some inexpensive tuning service. Thanks!
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Old 08-06-2019, 06:14 PM
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DIY engine tune a modern BMW ECU? Good luck. I tuned on a Megasquirt for a turbo E30 and I could not even imagine tuning for valve tronic or vanos. Let us know what you come up with though.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
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Old 08-06-2019, 06:36 PM
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So, is that you saying it is better to go the "tuning service" route, rather than the DIY route?
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Old 08-07-2019, 10:09 AM
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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.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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