Found horsepower and torque for X5 diesel

[centrofly]

from my understanding so far it is a plug in application that can be removed and reset to factory default, which is what my boat mechanic has. This is the way to go, not a "flash". Watched my mechanic roll out 700 horsepower in his diesel truck when he plugged into the obd 2 port. Then he reset to normal factory settings with one button.

[Fredo]

I've read in a few places that it's possible to get plenty of horsepower of the the twin turbo diesel, I've also read that tuning more than an extra 50 bhp has serious implications for the rest of the drive train.

Quite a few companies in the UK offer tuning but I haven't seen any that offer a warranty offer more than 50 bhp.

This company has an excellent reputation and really know there stuff on BMW's. The owner is a regular contributor on the best BMW forum in the UK mtorque.co.uk

Thorney Motorsport Bluefin Remapping (BMW)

[centrofly]

Nice. Thanks appreciate the info will look into it. The key to all of this is a removable,programmable chip and I will know tomm if BMW can see changes in there engine analysis from my good friend and BMW service director.

[Fredo]

The Thorney Motorsport one is a unit that lets you reprogramme the car and bring it back to standard whenever you want. I am currently thinking about having it done to my SD.

[centrofly]

I also feel the chasis can handle the extra power since I tow a 4000 lb boat behind it. This alone tells me it can handle the extra juice. Pulls and brakes perfectly! I think the issue is everyone is scared of warranty issues and service computers, which in my case my service adviser knows of this extra strain from towing a boat which increases fuel consumption and higher rpm revs. This in turn when hooked up to their computer would be difficult to differentiate especially when they see my hitch always hooked up to my X5.......

[centrofly]

Fredo -How much is their unit?

[Fredo]

Not sure...I think it's between £500 and £750.

I suppose my question would be if BMW see fit to upgrade the brakes on the twin turbo diesel when it has 50 bhp more than the single turbo unit then maybe they would need upgrading is you add another 100 bhp. I dont think BMW build that much redundancy into the specification of the transmission and braking systems etc....that would cost them a lot of money.

[centrofly]

The programing I am researching allows the end user to add power moderately not abusively all the time only when needed or wanted. When you pull and brake an extra 4000lbs on the back which BMW says is fine you will understand my point. I did not see anything listed for the E70 diesel on their site.

[kenny1krr]

I'm definitely interested!!

[JCL]

Originally Posted by centrofly

I also feel the chasis can handle the extra power since I tow a 4000 lb boat behind it. This alone tells me it can handle the extra juice. Pulls and brakes perfectly! I think the issue is everyone is scared of warranty issues and service computers, which in my case my service adviser knows of this extra strain from towing a boat which increases fuel consumption and higher rpm revs. This in turn when hooked up to their computer would be difficult to differentiate especially when they see my hitch always hooked up to my X5.......

I am not sure I understand why towing a boat or other load implies that the driveline can take any more power than it was designed for. Certainly there are safety factors designed in, but whether you are developing xx hp with an unloaded vehicle (and accelerating quickly) or developing xx hp with a heavily laden vehicle (and accelerating less quickly), it is still xx hp through the driveline. The chassis isn't really going to notice the hp, just the powertrain (until you get to the point where you are breaking engine mounts on one side).

It is an interesting discussion on whether modifications are visible to the dealer and/or factory. Most of my reading about this has been on e90post.com, in the forced induction forum, as Shiv and others have taken the 3.0 tt in the 335 and 535 to much higher outputs than they were released at by BMW. (The drivelines seem to have stood up pretty well, incidentally, but then you would have the torque issue with the diesel.) Most of these add-on systems (ECM flash, piggy-back, or whatever) were advertised as undetectable or removable. It turned out that there is often a trail of breadcrumbs left in the ECM that the dealer can spot if they go looking because they suspect that a modification was a contributing cause of damage to the vehicle. Things like fuel flows that are logged as peaks, and which go out of range, set flags that BMW has used to deny warranty when an owner has claimed that something like a transmission input shaft just failed as he was driving down the road. Essentially, claiming warranty in those circumstances is fraud in any case, but there has been a lot of discussion about owners wanting to keep their upgrades secret because of fears of being hassled for unrelated failures. You might want to read up on some of the experiences there, as the ease of tuning the 3.0 tt gasoline engine has caused the tuners to push the boundaries a fair bit.

I do think that it is fairly easy to tune a BMW diesel engine for more output, but I think it is a myth that it is undetectable.

EDIT: Thought I would go see what they are getting up to on the 335 over at www.e90post.com/forums There are dyno charts there for 443 hp at the rear wheels, 460 ft-lbs torque, on 91 octane pump gas (plus meth injection), using stock turbos peaking at 19 psi boost. Pretty impressive numbers. You can understand why they are trying to keep it undetectable to the dealer given the likelihood of failures in the driveline at those power levels . Just to provide a view of how far they are going, they are into the CANBUS with the latest tuner models, and so can now clear fault codes. One approach there has been to use one of the buttons on the steering wheel to clear codes while driving. Not sure if you have to drive around with it pressed or not, but it does provide a sense of how seriously they are taking this.