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Grenadier remap (flashing)

Shaky

Grenadier Owner
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Just throwing this out there to you guys that would undoubtedly know more about it than me.

Has anyone got any thoughts on aftermarket remaps, I assume they could be done as and when a specialist gets their hands on one to read what’s currently there. I know some would want more power and/or torque, but for me IF I had one done I would be looking for better fuel economy. It is one of the things I was disappointed with when the figures came out. This is made worse by the fact I have ordered the Petrol version. I have seen adverts before that there are economy maps supplied but always been suspicious that it’s a selling point as opposed to really doing anything meaningful. 
 
[QUOTE username=Shaky userid=8970976 postid=1332758278]Just throwing this out there to you guys that would undoubtedly know more about it than me.

Has anyone got any thoughts on aftermarket remaps, I assume they could be done as and when a specialist gets their hands on one to read what’s currently there. I know some would want more power and/or torque, but for me IF I had one done I would be looking for better fuel economy. It is one of the things I was disappointed with when the figures came out. This is made worse by the I have seen adverts before that there are economy maps supplied but always been suspicious that it’s a selling point as opposed to really doing anything meaningful. [/QUOTE]

The b58 is a tuners idea of heaven, loads of potential for crazy power but a sensible stage 1 map will see 400 bhp however as discussed on another thread they have weirdly specced it with a version o the zf gearbox which is only rated to 500nm of torque so that might be a limiting factor. That being said it is a strong box and I dought anybody I’d going to be doing launches or max speed runs in it so it should be fine!? 
 
> for me IF I had one done I would be looking for better fuel economy.

Very good point.

But you can already save fuel with a few very simple measures that already have a noticeable effect. I don't (yet) have a Grenadier, but I have taken care of such things ever since:
  • Higher tire pressure. Half a bar more is already more than half a liter less on 100 Km (feel free to calculate this for PSI and MPG). Of course, there is a sacrifice: Slightly worse tire adhesion. But it's not about lap times, I guess. And my style of driving has changed so that I am almost always way off any critical situation. And of course, there is no way to get to a better fuel economy without sacrifices.
  • No snorkel. Believe it or not: It makes a difference. When I fly a Cessna 172 with or without wheel pants, this makes a difference of 5 knots at identical power settings. And these pants are aerodynamic as opposed to a snorkel which has the drag coefficient of the Buckingham Palace.
  • Same goes for roof rack, rock sliders, light bar, awning and all the fancy things we love about 4x4 cars.
To be clear, I would like a light bar and rock sliders. But at least an awning doesn't have to be installed permanently nor do I usually need a second spare on the roof - unless I'm going on a vacation or camping trip. And a bit more pressure on the tires is ok if I am not in winter or off road conditions.

BTW: The smaller (i.e. thinner) the tires, the less the drag*). And smaller tires often have better traction than large ones.

If only they weren't so ugly ... ?


*) Short version: "... aerodynamics of a rotating tyre contributes about 33% of total vehicle drag."
 
No doubt there are standard BMW remaps which can improve the conservative IG tune for more torque/power. What's not certain at this stage  is whether the injectors and camshafts for example on  BMW's Grenadier engine production line are the same  part numbers as those for the respective engines fitted to BMW sedans/X5 versions which pump out higher numbers, or whether the power increases are purely software driven.

The ZF auto transmission identifiers for petrol and diesel options are  different, apparently signifying max. sustainable torque limits (ZF 8HP510  500 Nm; B58 petrol engine 450Nm); (ZF8HP 76  760Nm  B57 diesel engine 550Nm) This indicates prima facie that those seeking to "up" the HP/torque of the petrol engine have less margin than those wanting more grunt from the diesel version....
The thrust of "Sir Jim's" philosophy expressed in the latest Ineos video posted elsewhere by DaveB emphasises a vehicle which won't break down...  hence the conservative power output for longevity of both engine and transmission.  From a personal point of view, taking the "road less travelled" fits nicely with this approach.....?
The professional test driver who piloted the prototype on the drive day I attended hinted (with a grin) that the (diesel) with 4 passengers on board, the engine response on the highway was 'more than adequate' in part because of the wide power-band of the diesel (1250-3000rpm) and the spacing of the gear ratios ...
 
[QUOTE username=DenisM userid=8875352 postid=1332764015]No doubt there are standard BMW remaps which can improve the conservative IG tune for more torque/power. What's not certain at this stage  is whether the injectors and camshafts for example on  BMW's Grenadier engine production line are the same  part numbers as those for the respective engines fitted to BMW sedans/X5 versions which pump out higher numbers, or whether the power increases are purely software driven.

The ZF auto transmission identifiers for petrol and diesel options are  different, apparently signifying max. sustainable torque limits (ZF 8HP510  500 Nm; B58 petrol engine 450Nm); (ZF8HP 76  760Nm  B57 diesel engine 550Nm) This indicates prima facie that those seeking to "up" the HP/torque of the petrol engine have less margin than those wanting more grunt from the diesel version....
The thrust of "Sir Jim's" philosophy expressed in the latest Ineos video posted elsewhere by DaveB emphasises a vehicle which won't break down...  hence the conservative power output for longevity of both engine and transmission.  From a personal point of view, taking the "road less travelled" fits nicely with this approach.....?
The professional test driver who piloted the prototype on the drive day I attended hinted (with a grin) that the (diesel) with 4 passengers on board, the engine response on the highway was 'more than adequate' in part because of the wide power-band of the diesel (1250-3000rpm) and the spacing of the gear ratios ...[/QUOTE]

I am leaning more towards the deasil now! The inline 6 engines sound ok also which is nice as I hate normal deasil clatter ! 
 
1. I'm not buying the car for economy. It's a heavy brick.
2. Why would you need more power/torque? It's far more capable than what was offered just 10+ years ago.If you are towing a caravan you will be burning $ , always. But it's always cheaper than a hotel + pub meal.
 
Just a slight word on warranty issues as I'm sure you're all aware.

Our computers in the workshop will still pick up a remap on the car, even if it has been put back to standard before the car comes in for work!

What you do with your car is obviously upto you, but I know that if anything went wrong as a direct result of a remap you would struggle to make a claim.

Sorry for sounding like a humbug and telling people how to suck eggs but if it helps one person that doesn't know about this sort of thing then I'm sure you won't mind me posting this.
 
Thanks. I was sort of aware of that.  I was throwing ideas about how to make a particularly uneconomical vehicle a little more friendly on the wallet. So I would have thought it would put less stress on the engine than someone trying to squeeze every last bit of bhp out of it. 
 
I think that's a very honest answer and I suspected BMW workshops can do that. Anything else would be surprising.

A simple checksum somewhere is enough - and can not be manipulated.
 

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[QUOTE username=Shaky userid=8970976 postid=1332758278]Just throwing this out there to you guys that would undoubtedly know more about it than me.

Has anyone got any thoughts on aftermarket remaps, I assume they could be done as and when a specialist gets their hands on one to read whatâs currently there. I know some would want more power and/or torque, but for me IF I had one done I would be looking for better fuel economy. It is one of the things I was disappointed with when the figures came out. This is made worse by the I have seen adverts before that there are economy maps supplied but always been suspicious that itâs a selling point as opposed to really doing anything meaningful.

The b58 is a tuners idea of heaven, loads of potential for crazy power but a sensible stage 1 map will see 400 bhp however as discussed on another thread they have weirdly specced it with a version o the zf gearbox which is only rated to 500nm of torque so that might be a limiting factor. That being said it is a strong box and I dought anybody Iâd going to be doing launches or max speed runs in it so it should be fine!?
[/QUOTE]

My Dad has a v6 Amarok with the zf 8 speed box. It has 400hp and 900nm of torque and it handles it fine!
 
The b58 is a tuners idea of heaven, loads of potential for crazy power but a sensible stage 1 map will see 400 bhp however as discussed on another thread they have weirdly specced it with a version o the zf gearbox which is only rated to 500nm of torque so that might be a limiting factor. That being said it is a strong box and I dought anybody Iâd going to be doing launches or max speed runs in it so it should be fine!?

My Dad has a v6 Amarok with the zf 8 speed box. It has 400hp and 900nm of torque and it handles it fine!
[/QUOTE]
Mmm - what else did your dad have done to achieve this result? Seriously I would be interested to know.
I don’t think that many responsible tuners would take a stock V6 Amarok to this level, most tuners max out at 230kw/700nm for this setup - this is what I have on mine.
300kw/900nm from a factory tune of 165kw/550nm is asking for trouble.
 
mm - what else did your dad have done to achieve this result? Seriously I would be interested to know. I don’t think that many responsible tuners would take a stock V6 Amarok to this level, most tuners max out at 230kw/700nm for this setup - this is what I have on mine. 300kw/900nm from a factory tune of 165kw/550nm is asking for trouble.
Look up darkside developments. His was the test vehicle.
 

The upgrade cost would be too rich for me, but its fun reading about this stuff.
 
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