DMS on Maserati GTS

[w5pwr]

Anybody got a DMS map on their GTS, is it worth it?

How does it affect warranty?

[Hedgetrimmer]

w5pwr said:

Anybody got a DMS map on their GTS, is it worth it?

How does it affect warranty?

Best asking the question on the sports maserati forum. A group of 30 cars were remapped by DMS over the last two months. Most were enjoying 20-40 bhp improvements due the restrictions that were placed on Maserati by their big brother who didn't fancy their toes being trod on!

[sjn2004]

As above, the GTS was actually 470 stock, after remap 505bhp. Check this thread for the complete picture .

http://www.sportsmaserati.co.uk/showthread.php/378...

[Palmball]

I met and spoke to the owner of said car last week as I was very interested in this for my GT-S and his opinion was that in all honesty, he couldn't tell the difference.

I've never had a good experience in remapping an N/A car as there's so little extra to eek out of them...3% here, 4% there....you just won't notice it and some remaps can actually be detrimental to performance (plenty about this in the Porsche section). Turbo's are very different of course but having tried remaps on my BMW M3 and M6 with bugger all difference except I was a few hundred notes lighter! I did my C63 too but as it already had the factory Performance Pack Plus, theres was nothing left to give (although I'll concede that a standard non-PPP C63 is heavily detuned so can get a genuine 10% increase). For an N/A you need to be cleverer...improve breathing in and out of the engine with a remap to compliment this and you may get some worthwhile gains but a remap on it's own is largely futile.

There are a couple of companies out there who do remaps for GT-S's and quote about 20-30bhp at the most (which is an entirely realistic claim no doubt....but you just won't notice 20bhp on a 440bhp, nearly 2-ton car!). With this in mind, I don't quite know how DMS with the same ECU parameters to work with that everyone else has can get more than a 60bhp increase compared to standard? Somethings not right and if the owner can't feel 60bhp then I'd hazard a guess thats because it's not there.

[Hedgetrimmer]

Under normal circumstances I would agree as N/A engines have very little scope from improvement other than timing advance, removing corrections for lower octain fuel etc.

The increased figures quote probably relate more to the 4.2 rather than 4.7 engine. However, the original maserati map was a compromise in order to keep figures well below the F430 output (different crank of course) so removing the retardation has a big impact.

Maybe the increase is less obvious as the GT is soo heavy relative to the 4200 :-) I can only speak from experience of the improvements on my 4200 which were very noticable, especially torque lower down the range.

[sjn2004]

Palmball said:

There are a couple of companies out there who do remaps for GT-S's and quote about 20-30bhp at the most (which is an entirely realistic claim no doubt....but you just won't notice 20bhp on a 440bhp, nearly 2-ton car!). With this in mind, I don't quite know how DMS with the same ECU parameters to work with that everyone else has can get more than a 60bhp increase compared to standard? Somethings not right and if the owner can't feel 60bhp then I'd hazard a guess thats because it's not there.

PB, Dan's car on the DMS dyno was 470bhp stock and 505bhp after remap. Only 35/470 increase, its just that the car is officially underquoted at 430/440. There was also a silent upgradem on the 4.7 engine to direct jet injection, easiest way to tell is to look for the ECU. If its under the passenger footwell its an early car, if not then its the later car and has the ECU in the engine compartment.

Simon

[Palmball]

sjn2004 said:

PB, Dan's car on the DMS dyno was 470bhp stock and 505bhp after remap. Only 35/470 increase, its just that the car is officially underquoted at 430/440. There was also a silent upgradem on the 4.7 engine to direct jet injection, easiest way to tell is to look for the ECU. If its under the passenger footwell its an early car, if not then its the later car and has the ECU in the engine compartment.

Simon

Hi Simon....fair enough as the stock 470bhp indicates DMS weren't underquoting the original bhp to make the gains look bigger so the real gain is 35bhp...again, probably not big enough for the gain to be perceptible hence his feedack on it.

What you say on the early/late 4.7 doesn't make sense to me though... my car being an '08 model must be a very early one yet there is no ECU in either footwell and it appears to reside in the engine bay.