E60 M5 remap by DMS

[Shaoxter]

Went down to get my E60 M5 remapped by DMS today and I was pretty surprised at the results!

To be honest I wasn't expecting much and slightly suspicious of their claims of +40bhp as the S85 is already a highly tuned unit, but DMS operate on a no happy no fee basis so I thought why not...

I was pretty pleased to find out that my car was one of the strongest stock M5/M6's they've had, putting out 512bhp stock. Post remap it was an extremely impressive 558bhp which was one of the best results they had seen! I'm convinced this is a true power gain and not just an illusion created by making the throttle more sensitive because at full throttle the car felt like an absolute missile above 100mph. Almost managed to crash on a straight piece of road with the wheels spinning up in third gear (my new favourite gear)

Here's a link to a vid of it on the rolling road and a pic of the dyno chart:



Many thanks Tony!

[Shaoxter]

Patrick Bateman said:

An extra 46bhp on a highly strung, normally aspirated M engine through a remap only?

Well the gain comes from removing the 3rd-7th gear torque limiters. I think there might be other stuff involved as well but I don't think they'd give too much away.

sradmarty said:

If you don't mind me asking, and assuming you're happy, how much did they charge for the remap?

Cheers

PM'd

[Shaoxter]

Wills2 said:

An image of the before dyno run would be interesting to see.

It's the lower graph.

ds666 said:

Does an e60 m5 have the torque limited in 3rd - 7th ??? ( Surely it is more likely to be limited in 1/2nd ?)

Well it's limited in 1st and 2nd too, but those limiters aren't removed.

[Shaoxter]

TheAngryDog said:

^^^ have you had it on a different set of rollers, or just the DMS ones?

I'm keen to put mine on an independent dyno, I'm a naturally skeptical person too... now who's willing to pay me for the time and cost of doing it?

Their dyno looked pretty sophisticated to me, and they have some nice facilities and a good reputation so it's not like a backstreet garage making up graphs on the computer or anything...

[Shaoxter]

JMBMWM5 said:

only delt with them once, that was enough, what they stated and what we tested elsewhere were miles apart, not for me.

Did you test both before and after elsewhere? To account for the fact that not all rolling roads are the same.

[Shaoxter]

TheAngryDog said:

Shaoxter said:

Did you test both before and after elsewhere? To account for the fact that not all rolling roads are the same.

No 2 rolling roads are the same. Each operator sets it up differently and there are so many ways that figures can be generated.

That's my point, so for consistency you really need a before and after on the same rolling road.

The DMS results were on the same rolling road, so unless they fudged the numbers on the computer, the power gains are there.

[Shaoxter]

Wills2 said:

Anyway power increases are not the measure, the measure should be Vbox runs showing the improvement in acceleration times, some tuners do this (Hartge/ACS) and the top end Porsche tuners but I've yet to see the likes of DMS prove the power they claim.

I have a friend with a stock M5, I'm keen to test them side by side and will post the video if I do.
Does anyone have a spare empty runway?

However in my non-scientific and small sample test, the car definitely felt quicker from 100-160 leptons, the numbers just came up so quickly.

[Shaoxter]

TheAngryDog said:

The S85 is meant to produce 383 ft lbs of torque, so only a gain of 1 ft lb? Or is 383 optimistic from the start?

According to the graph on this site the torque curve seems very peaky up to the max torque figure, mine seemed to show much flatter curve.

Anyway as we all know peak torque is a figure which is meaningless in isolation
The peak torque on my graph is around 6700rpm rather than BMW's quoted 6100rpm.

[Shaoxter]

The wheels bhp to flywheel bhp assumptions aren't really relevant though, as long as you're using the same method each time before and after for comparison.

Unless you're suggesting that they're not using the same methods before and after and are fudging the numbers somehow... but they're a reputable company who've been in the business for 20 years so I think someone would have uncovered a scam by now if there was one.

Anywhoo back to real world testing, I'm looking to organise this stock vs remapped race after the new year, anyone got any tips for making it a controlled environment?

[Shaoxter]

Ok finally managed to get together for a race, had to go all the way to Germany for the autobahns...

DMS tuned E60 M5 vs stock E60 M5

[Shaoxter]

Also just to add, I tried to make it as fair a test as possible - both S5, P500S, MDM mode, in third gear, Vpower, I had about 10-15L less fuel because I weigh a bit more.

Road was arrow straight so no bends either.

[Shaoxter]

AW10 said:

interesting to note that there wasn't much difference up to 150 or so and then when you shifted into 6th the difference grew and grew.

I presume the rpm spikes in 3rd were wheel spin?

Well the stock cars are limited to 168mph or so (and then slow down to 155mph I think).
The small spike at the start looks like a bump in the road, TC was in MDM mode so should still have intervened a bit if there was wheelspin.

King Eric said:

Seen any difference in economy fuel wise on a normal run?

I don't drive to work and don't really drive the same routes so can't really comment on fuel economy.

mybrainhurts said:

King Eric said:

PM me the DMS price?

What's all this secrecy about the price?

Well I PMed someone the price at the start and then more people asked for PMs... anyway as there seem to be lots of people interested in the price, it was £725 +VAT.

[Shaoxter]

Upon reviewing the footage, here's some performance times

60-100mph: 5.15s, but shifted a bit early from 3rd to 4th at 97mph, would have been ~4.9s in 3rd I think
60-125mph: 9.2s
60-150mph: 15.2s
60-180mph: 26.3s