518d tuning to 520d level

Shazux · 08-01-2023, 04:21 AM

Hello, I'm new both to this forum and BMW.
I'm looking for a used f11 520d lci with b47.
There is one 518d for sale for much less and the owner says he put the original 520d map on the engine and transmition.
My understanding is that it's the same engine but downtuned for economy or whatever, so my questions are: is it that simple? Is it the same car as 520d now? Is is safe for the car (engine/transmision) and is it still possible/safe to tune it further? As my original plan was to get 520d and put some stage1.
Thanks in advance and sorry if it's a repost and I missed it.

Bounceme · 08-01-2023, 09:47 AM

I'm not sure, but the turbo on the 518 might be a little smaller than on the 520.

brad850csi · 08-01-2023, 01:34 PM

I looked up the engine block, piston and turbo on realoem.com - everything is the same part number between the two.

My guess is that doing that tune is a valid option and a thing you could do - but whether that is actually what has happened on your car is another matter!

zener · 08-01-2023, 02:50 PM

And you can get more out of it than just 520d power. I basic 520d map on my and it's around 230hp/450nm + xhp on transmission. You should get same out of 518d.

08-01-2023, 04:21 AM	#1
Shazux Registered 0 Rep 1 Posts Drives: G30540ix Join Date: Aug 2023 Location: Croatia iTrader: (0)	518d tuning to 520d level Hello, I'm new both to this forum and BMW. I'm looking for a used f11 520d lci with b47. There is one 518d for sale for much less and the owner says he put the original 520d map on the engine and transmition. My understanding is that it's the same engine but downtuned for economy or whatever, so my questions are: is it that simple? Is it the same car as 520d now? Is is safe for the car (engine/transmision) and is it still possible/safe to tune it further? As my original plan was to get 520d and put some stage1. Thanks in advance and sorry if it's a repost and I missed it.
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08-01-2023, 09:47 AM	#2
Bounceme Private First Class 111 Rep 138 Posts Drives: 2016 F11 520d LCI Join Date: Oct 2015 Location: Nordjylland iTrader: (0)	I'm not sure, but the turbo on the 518 might be a little smaller than on the 520.
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08-01-2023, 01:34 PM	#3
brad850csi Colonel 1316 Rep 2,349 Posts Drives: 16 F13 M6 Comp Join Date: Jan 2015 Location: Auckland, New Zealand iTrader: (0)	I looked up the engine block, piston and turbo on realoem.com - everything is the same part number between the two. My guess is that doing that tune is a valid option and a thing you could do - but whether that is actually what has happened on your car is another matter! __________________ SCOTT26 "So as an admirer of the M5 and a potential customer of an M5 Touring. I would run naked around the streets of Garching if they were to offer one."
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08-01-2023, 02:50 PM	#4
zener BMW enthusiast since 2004 343 Rep 183 Posts Drives: E65 730d, F10 520d, E34 520i Join Date: May 2022 Location: Finland iTrader: (0)	And you can get more out of it than just 520d power. I basic 520d map on my and it's around 230hp/450nm + xhp on transmission. You should get same out of 518d.
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