640D remap - best place?

[Mirinjawbro]

hello all

where would people recommend to get a 2017 640d remapped?

currently thinking NVM near birmingham - its a 2 hour drive but probably worth it.

i am hetfordshire so that would be best.

thanks

[cossy400]

Look up GKR Performance.

They get rave reviews.

[Charlie Croker mk2]

So when exactly is a 640d not fast enough LOL In reality its a unique mix of fuel range and performance.

Spend your money on a comprehensive preventative service including gearbox oil change and brake fluid flush .

[Mirinjawbro]

when my old car did 100-200 in 7 dead.

all servicing has been done

[Aluminati]

Probably Evolve in Luton.

[gobshite]

Unicorn motor developments Manchester

There’s loads of information on the uk Facebook group.

Low pressure turbo converter will probably need changing

Are you updating the intercooler?

[The spinner of plates]

Mirinjawbro said:

when my old car did 100-200 in 7 dead.

OK, you got me - say more on this. I remember reading a Bugatti Chiron could do 125-185 in 7.0secs!


eta

Actually... think you are talking in kph right?
Yeah 7 dead is quick - Nissan GT-R / mid level McLaren, 911 Turbo etc I guess.

Edited by The spinner of plates on Tuesday 12th July 01:52

[Mirinjawbro]

yes sorry kph.

even that didn't feel fast after a while. only ever lost one drag race and that was to a bike (no idea what it was)

sadly at the time i was on my way back from filling up and also had a 2nd passenger.

he still would of won but the gap would of been less

[manracer]

I would recommend more-bhp in Crewe.

They have done literally 1000s of BMW tunes and provide before and after dyno runs. Each map is tweaked, not just loaded on and away you go.

I See Tom Wrigley Performance use them too now.

[gobshite]

There plenty of usable power, before mapping mine was 289bhp and 474lbf respectively

I installed a Wagner intercooler, gearbox is rated for 800nm

I have ps4 tyres, will still break traction if you heavy with the throttle,

Loads of usable power

Edited by gobste on Tuesday 12th July 18:20

[gobshite]

Definitely shorten oil change schedule, you see people chasing higher bhp figures, you really need bigger injectors and hybrid turbos which are not cost effective

Depending on mileage, my personal experience has been you will need to change / replace some ancillaries as your putting more strain on them.

Live map is definitely the way forward, you can then dial it back a bit which is what I did, it’s a 2 ton car so 20 bhp won’t really make a difference

Edited by gobste on Tuesday 12th July 18:20

[Maxus]

gobste said:

I installed a Wagner intercooler, gearbox is rated for 800nm

Edited by gobste on Tuesday 12th July 18:20

Are you referring to the standard gearbox? I understood that it was the ZFHP70 fitted to the 640d which is rated at 700nm. Many remaps seem to push towards or beyond this though.

[gobshite]

Your 100% correct

Rated to 700nm

I was talking out of my bum, just checked the email I was sent

I was at 590lb which is just under 800nm and we reduced to 560 / 760nm

[Maxus]

gobste said:

Your 100% correct

Rated to 700nm

I was talking out of my bum, just checked the email I was sent

I was at 590lb which is just under 800nm and we reduced to 560 / 760nm

Interesting. Was the email to say they had gone beyond the specified capability therefore enjoy at your risk or do they provide some sort of warranty on the job?

It's tempting to remap a 640d as the gain is significant however, balancing the potential additional risk v standard power is a tough one.

Appreciate many people have done it without problem and who doesn't want just that little bit more

[Thomas_]

The standard gearbox is limited to 760nm but that is the map rather then the limit of the box.

To get more than 760nm the gearbox needs to be mapped.

[gobshite]

From a power point of view, I asked for it to be reduced once he pointed out the limit of the gearbox.

Xhp is a licences software that can be used to increase the line pressure to take more powers along with adjusting the speed of the gearbox changes.

I didn’t go for this as I was just after more overtaking power when moving and there’s been mixed reviews.

As with any modification, it’s buyer beware, I started off with just a dyno run as the car felt sluggish

Had a low reading so took the inlet manifold off and found this



Found this on

Replaced with a new one

From an extra power point of view is really down to you as a operator, I have BimmerLink which give you live data, gearbox temp, swirl flap position, boost pressure, let everything get up to temp, apply full throttle when moving,( you can only put the power down once moving any way)

[VeeTenM]

bwchiptune
EndTuning
Evolve
celtictuning
darksidedevelopments

loads out there, evolve would be my option

[Ninja59]

Thomas_ said:

The standard gearbox is limited to 760nm but that is the map rather then the limit of the box.

To get more than 760nm the gearbox needs to be mapped.

That is a later version, the rated safe limit on the 8hp70 is 700nm, I don't believe the 640D got the later 8HP75 variant which 750Nm.

Personally, having seen more and more N57 issues regarding main bearings and needing rebuilds or replacement engines, shorten the oil change interval if it needs a set of chains then do that and the gearbox. I suspect a number of failed bottom ends were down to long life servicing, diesel fuel in the oil due to regens and then being remapped with some miles on...

[Granite Man]

Currently have a 640d 18 plate. would like to get this remaped along with gearbox. what perfomance gains can be achieved and mpg gains if any

[Sim89]

Would also recommend Glenn at GKR, he mapped my F31 330d, hasn't put a foot wrong in over 70k of ownership.