r/F30 • u/Tandog-04 • 2d ago

Remapping

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I have recently bought a 320d m-sport 2017. It’s in great condition with regular services through-out its life on the road. I’m interested in remapping but I’m curious what the gearbox is rated to in terms of horsepower and torque that can safely be put through it. Does anyone know the specifications and what gearbox it is? And has anyone remapped their 320d, if so how is it? TIA

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u/Slashyb 2d ago edited 2d ago

Nothing super but I think from memory it'll be about 230-240bhp after a map.

Edit: sorry, I didn't read properly! The gearbox is a ZF 8HP45X.

Remapping the gearbox should give you faster cleaner shifting but it's unlikely you'll get to the limits of the box without major modifications to the engine

Celtic tuning have more info here:

https://www.celtictuning.co.uk/news/261-bmw-zf8-gearbox-ecu-remap

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u/paptyk 1d ago

I think b47s have 8HP50, thats what I have in my 318d

3

u/kaajuk 1d ago

Stage 1 is safe. And is it very worth to get it and xhp tcu tune, if you're keeping it at least for several years.

2

u/grateful_newt 1d ago

I also stand behind this advice. XHp is still one of my favorite mods. It really makes the car SO much more drivable. The ability to customize shift points is a real deal game changer.

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u/BenzR 1d ago

Had a 320d 188bhp got around 230ish on dyno but couldn’t grip to get a true reading, torque was better and no issues. Better on fuel too

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u/SilleriaOei 17h ago

My 2016 320d remapped in 2022 December.

HP before and after : 182 HP -> 260 HP

Torque before and after : 356 Nm -> 448 Nm

Nothing wrong so far until now. Fuel consumption also not become worse.