DMS Automotive - C230K Chipping

[GrahamC230K]

The "after" dyno results

OK. The results we have been waiting for. I have to say I am very glad I waited to get the car dyno'd. If I had of had this done straight away and got what appears to be poor results, I would have had the remap reverted and not paid. I can't explain the results, but I know my car feels better!

OK, the scene at the dyno for those that have never been to one........

and a video - although the noise of the fan over rides the engine and supercharger on the recording

Video - Right Click - Save As

To the power plots.

Basically, power at the rear wheels was within 2BHP of my last runs, so lets call that quits! Ignore the big number on the BHP vs torque plot. It is the "estimated" flywheel power, it's not measured and it's BS! The transmission losses to get that figure are way out. Power remains the same - approx 205BHP.

The important thing is to compare the two curves. Blue is after obviously! The after is healthily above the original, following the original shape too, but nothing dramatic. Peak power has moved from abput 5400rpm to 5600rpm, Way below my new rev limit of 6500rpm anyway. Ignore the ft/lb figures too - they must be well out, but you can comapre the increase.

Next is the lamda - air/fuel. This plot shows BHP at the wheels also. The true figure.

The plot shows the car is running richer.

Lastly, boost. Apart from a slight cross over in a small lul at about 3300rpm, boost is up slightly from 4000 rpm up.

I have no reall idea what it all means, the dyno operator could have used a better larger scale in some of the charts, but we have results. I am happier with the car than the plots show, but at least I know fuelling and boost are safe.

Enjoy!

 

[MJB]

All looks good as you say, and i can confirm from the passenger seat that the car does go so much better - I was passenger for last years Germany Nurburgring Run (plenty of flat out moments and lots of 70-100plus acceleration) and i am convinced that it now picks up faster and goes harder !

Also if a certain new golf GTI owner nr Bicster was being honest he would have to admit he saw the back end of the kompressor disappearing very quickly on Sat afternoon !!!

Matt (G's Bruv - not biased, just like fast cars and the smell of petrol !!)

 

[Shude]

and a video - although the noise of the fan over rides the engine and supercharger on the recording

Well worth it just for the sound of the supercharger! Makes a v6 sound a bit boring IMHO

Those who haven't decided C240/C280/C230k think on!

 

[scotth_uk]

Dyno Dynamics - when only the best will do.

Thanks for posting the pics and vid. Glad to hear that you are happy with it. Always a pleasure to see a fellow MBClubber upgrading and happy!

 

[GrahamC230K]

Dyno Dynamics - when only the best will do.

Thanks for posting the pics and vid. Glad to hear that you are happy with it. Always a pleasure to see a fellow MBClubber upgrading and happy!

Yes, it's a class dyno.

I am happy, but torn. I am not sure whether to call DMS Automotive back. I do NOT want the car put back to standard - this is way to good.

Studying the chart, there is a 10ft/lb increase in torque between 4000 - 5000rpm and about 5 ft/lb in the rest of the range. Although peak power is not increased much, you can see that from 4000rpm to 5000rpm, before peak power is reached that curve after the remap is 5 BHP more (at the wheels).

However, they did speak of at least a 25BHP increase, of which there is no evidence.

Perhaps a polite call in terms of, "would you like to check your work" is in order. I feel the price I paid for a "driveability" chip to be a little steep.

At least my insurance declaration of a up to 10% increase chip is 100% valid!

 

[scotth_uk]

I'd call them and discuss it. If you've had a good realationship with them in the past, then they should be receptive to a discussion.

 

[GrahamC230K]

I'd call them and discuss it. If you've had a good realationship with them in the past, then they should be receptive to a discussion.

Which they were. Spoken to them already, very agreeable, getting back to me before 12 (we shall see) regarding either a different map or a monetry agreement more in keeping with the results achieved.

 

[Will]

Yes, it's a class dyno.

I am happy, but torn. I am not sure whether to call DMS Automotive back. I do NOT want the car put back to standard - this is way to good.

Studying the chart, there is a 10ft/lb increase in torque between 4000 - 5000rpm and about 5 ft/lb in the rest of the range. Although peak power is not increased much, you can see that from 4000rpm to 5000rpm, before peak power is reached that curve after the remap is 5 BHP more (at the wheels).

However, they did speak of at least a 25BHP increase, of which there is no evidence.

Perhaps a polite call in terms of, "would you like to check your work" is in order. I feel the price I paid for a "driveability" chip to be a little steep.

At least my insurance declaration of a up to 10% increase chip is 100% valid!

Sounds similar to what I was thinking. Although you are obviously pleased with the results, it does seem as if they have not met their promises of delivering the power and torque figures that they quoted you.

Hope you can both come to some sort of mutual agreement?

Good Luck,

Will

 

[R2D2]

Hmm. Glad you are enjoying the car but a concerned by the graphs. If you compare my graph with your graph ignoring the auto differences, The power and torque have move down the rev/speed axes and in places the before and after lines are greatly different. Your graphs seem to show a small but even increase. Maybe theyd accept less money for less significant change. There is one possible answer though......your car has already been chipped or remapped. That would explain how you went from 193 standard to 205bhp before chipping at dms ??

 

[Shude]

That would explain how you went from 193 standard to 205bhp before chipping at dms ??

bad science is what provided the earlier 205bhp reading.

 

[R2D2]

Maybe. It just seems strange that upping the rev limits and fuelling results in minimal increases in power

 

[Dieselman]

Not really.
A petrol engine has to run in a certain air fuel ratio so adjustments can only be small. Without altering the boost I don't see how much extra power will be extracted.

 

[GrahamC230K]

DMS called me back, are still agreeable but they needed to speak with the engineer who actually did my car to confirm the map used. I missed their call late afternoon, so will speak in the morining. A suitable comprimise or solution is on the horizon I think.

Still smiling everytime I drive it - or is it just these near freezing temperatures?

 

[GrahamC230K]

DMS want to either return to remap again with a more "hot" program, but that won't be until new year, or agree on a "friendly Christmas price" for what I already have.

As the BHP increase is 0 as appossed to just a little short, I am inclined not to believe they can do much better. The approx 10ft/lb increase is not to be scoffed at though.

What shall I do? Decisions!

 

[C240Sport97]

take the friendly christmas price option ...

say, £50 because of all the hassle and disappointment

 

[GrahamC230K]

take the friendly christmas price option ...

say, £50 because of all the hassle and disappointment

Hmm, perhaps a little more than that, although I am inclined to agreed. The trouble is I am not dissapointed - some how the car is better, but not on paper how they sold it. If they had sold me a "driveabilitry remap" for better response but no pwer gain I would have no quibbles.

 

[C240Sport97]

you can act disappointed

plus you like the feel of the car so why not?? tell them you don't have the time or can you be bothered to go through all that hassle for all that disappointment, so you'll give them £50 to go away

 

[Will]

I don't know if I would personally settle for £50?!

No offense, but it is not proportional to the difference between what was offered and what was delivered.

As you said, it is steep for a 'drivability' chip!

Hopefully you can reach a good compromise?

Cheers,

Will

 

[GrahamC230K]

I have a 50% refund now. The other 50% 1st week of Jan when the come to revert the car to standard. We couldn't agree a price on the work they had done.

Apart from poor results, they have however been a pleasure to deal with throughout.

 

[GRAV888]

That's made my mind up then.
I was gonna use them to de-limit mine and give it the biggun.
Will have to look somewhere else now I suppose.