840d Superchips remap done...and...
Discussion
After much deliberation I finally got it done. I mean the car in standard form is no slouch but curiosity won. Plus no harm in more grunt.
The car is now just something else. In sport mode the throttle response is instantaneous with powerful acceleration right from the start. It's very quick. No timings yet but will have a go at some point. Acceleration on the motorway is enough to get me into trouble. I goes very quick. I've had the car only a few weeks but now I'm even more impressed.
Power increase is approximately +60bhp and 100Nm more torque. Not had it on the rolling road so estimated figures only.
The car is now just something else. In sport mode the throttle response is instantaneous with powerful acceleration right from the start. It's very quick. No timings yet but will have a go at some point. Acceleration on the motorway is enough to get me into trouble. I goes very quick. I've had the car only a few weeks but now I'm even more impressed.
Power increase is approximately +60bhp and 100Nm more torque. Not had it on the rolling road so estimated figures only.
Impressive, but I'm curious...
What does adding 60bhp and 100Nm torque do to a car, such that the manufacturer was dissuaded from shipping it with this extra performance in the first place? Or is it more a case that the car can easily take it but they wanted to make sure there was enough of a gap between the 640d and the M6?
What does adding 60bhp and 100Nm torque do to a car, such that the manufacturer was dissuaded from shipping it with this extra performance in the first place? Or is it more a case that the car can easily take it but they wanted to make sure there was enough of a gap between the 640d and the M6?
MitchT said:
Impressive, but I'm curious...
What does adding 60bhp and 100Nm torque do to a car, such that the manufacturer was dissuaded from shipping it with this extra performance in the first place? Or is it more a case that the car can easily take it but they wanted to make sure there was enough of a gap between the 640d and the M6?
That’s a good question, it’s probably down to emissions etc. I don’t think it’s about the gap between the 840d and the M8/M6 as the M850i exists with 530bhp.What does adding 60bhp and 100Nm torque do to a car, such that the manufacturer was dissuaded from shipping it with this extra performance in the first place? Or is it more a case that the car can easily take it but they wanted to make sure there was enough of a gap between the 640d and the M6?
It's a combination of emissions and also to keep a sufficient gap between models I would say. The gearbox , for example, is the same one in both the 840d and the M850i. I was surprised.
The increase in output from the engine was a modest one too, it's probably capable of more but what I've got is more than enough.
The car feels so much more sporty now and I'm staggered at how quickly it goes.
Forgot to mention the very noticeable improvement in fuel economy. On a normal trip from London to Yorkshire I was easily getting 46 mpg. Last weekend Bournemouth to Hertfordshire I got 50mpg. The first part of my trip yesterday (before I got heavy footed) I got up to 54mpg (motorway). Amazing for this caliber of car.
The increase in output from the engine was a modest one too, it's probably capable of more but what I've got is more than enough.
The car feels so much more sporty now and I'm staggered at how quickly it goes.
Forgot to mention the very noticeable improvement in fuel economy. On a normal trip from London to Yorkshire I was easily getting 46 mpg. Last weekend Bournemouth to Hertfordshire I got 50mpg. The first part of my trip yesterday (before I got heavy footed) I got up to 54mpg (motorway). Amazing for this caliber of car.
Pioneer said:
Where does this leave you ref. the warranty?
That's gone if they find the remap which they will if they look, I was thinking about this for my 740d but not sure an additional 60hp in a 2 tonne car will make much difference TBH, plus you go above the ZF8HP75 torque rating as well. Edited by Wills2 on Friday 20th September 09:47
Wills2 said:
Pioneer said:
Where does this leave you ref. the warranty?
That's gone if they find the remap which they will if they look, I was thinking about this for my 740d but not sure an additional 60hp in a 2 tonne car will make much difference TBH, plus you go above the ZF8HP75 torque rating as well. Edited by Wills2 on Friday 20th September 09:47
Pica-Pica said:
Pioneer said:
Where does this leave you ref. the warranty?
..and where does that leave you with DVLA and VED?Pica-Pica said:
Pioneer said:
Where does this leave you ref. the warranty?
..and where does that leave you with DVLA and VED?Why does every 'I've remapped my car' thread end up with people saying 'what about your warranty', 'is the car leased', 'have you told your insurance' and now the 'have you told the DVLA'. He possibly couldn't give a toss about any of those things - he has enough 'contributors' worrying about them for him
:-D
If something goes wrong with the car then BMW have to prove it was a direct result of any relevant modifications to the car. If they do not honour any claim then Superchips warranty kicks in to cover any loss.
With regards to torque ZF doobidaa thingy...what's that? If this car is going to fall apart just because of another 100 Nm of torque then I should trade it in right now for a Nissan Micra (peace of mind and all that).
DVLA....who cares.
Insurance, yes they need to be informed of the mod. They need to be informed of everything, even when I change my underpants..premium goes up if I wear bright colours...
If something goes wrong with the car then BMW have to prove it was a direct result of any relevant modifications to the car. If they do not honour any claim then Superchips warranty kicks in to cover any loss.
With regards to torque ZF doobidaa thingy...what's that? If this car is going to fall apart just because of another 100 Nm of torque then I should trade it in right now for a Nissan Micra (peace of mind and all that).
DVLA....who cares.
Insurance, yes they need to be informed of the mod. They need to be informed of everything, even when I change my underpants..premium goes up if I wear bright colours...
Just wondered. The wife just bought a new i8 and we were looking to put aftermarket wheels on it. BMW were a bit grey on the warranty issue but eventually said gearbox, drivetrain issues etc wouldn't be covered. Tried various solutions to do it the 'proper' way but was a complete b*ll ache in the end. We normally use Aviva to insure all our cars and they were fine with it. Not BMW Insurance though who it was originally insured with, they said it would invalidate the whole policy. And that was just the most basic mod you can do!
Fair enough. However, asking BMW if they will cover any issues arising after modifications are carried on their perfectly manufactured cars will get a very unsurprising answer. Why would they encourage it? What would be interesting to hear is what did happen in cases where a fault was declined on a modified car? What was the fault? What was the modification? etc.
I thinks it's all down to how sensible you are with what you do. Modern cars are pretty solid and they have enough tech to stop them having a heart attack if things aren't running right.
I thinks it's all down to how sensible you are with what you do. Modern cars are pretty solid and they have enough tech to stop them having a heart attack if things aren't running right.
zaz777 said:
Fair enough. However, asking BMW if they will cover any issues arising after modifications are carried on their perfectly manufactured cars will get a very unsurprising answer. Why would they encourage it? What would be interesting to hear is what did happen in cases where a fault was declined on a modified car? What was the fault? What was the modification? etc.
I thinks it's all down to how sensible you are with what you do. Modern cars are pretty solid and they have enough tech to stop them having a heart attack if things aren't running right.
Whereas Audi just flag the car TD1 and void it, my BMW dealer tells me they flag as well internally, they recently found a mileage blocker on a customers car after it was hooked up and it had codes that didn't make sense, it was in for warranty work they rang him up and said come and take your car we won't be working on it. I thinks it's all down to how sensible you are with what you do. Modern cars are pretty solid and they have enough tech to stop them having a heart attack if things aren't running right.
Chestrockwell said:
I wish I had that mentality towards a brand new 70k car 
I shat myself every time I thought about remapping my 4 series
£86k....I shat myself while it was being worked on and I'm still nervous about it now...a lot of it is psychological. Take care of the car and it will be fine. Before this 8 I had the Audi A7 3.0 BiTdi for 3 years. Took good care of it and it was perfect during ownership, absolutely nothing ever went wrong.I shat myself every time I thought about remapping my 4 series
Very brave man with a lot of faith in the superchips warranty, if there is a significant failure BMW will find out about the map and its up to the owner to prove the modifications did NOT cause the problem not the other way around.
Worth mentioning remapping is not permitted on financed cars either.
Great looking car though
Worth mentioning remapping is not permitted on financed cars either.
Great looking car though
A manufacturing fault could happen at any time, but not be covered by the warranty.
The most important thing, though, is to make sure you declare the mod when you come to sell the car. The next owner must be able to decide if they want to buy a modified car over an unmodified one. If they are unaware of having bought an unmodified one, they are exposed to reliability, warranty and insurance issues. This would be very unfair on them, were they to be unaware of a mod.
The most important thing, though, is to make sure you declare the mod when you come to sell the car. The next owner must be able to decide if they want to buy a modified car over an unmodified one. If they are unaware of having bought an unmodified one, they are exposed to reliability, warranty and insurance issues. This would be very unfair on them, were they to be unaware of a mod.
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