DMS remap 440i

Southern Jay · 08-14-2018, 02:50 AM

I travelled down to DMS with a friend at the weekend to get our cars mapped, having seen some of the figures quoted I was optimistic for the results, I'd taken the Powerizer off the day before in preparation, I'd also filled up with Tesco memento fuel.

The run before the map showed 348 bhp, baring in mind the only mods that could effect this is the Remus cat back system and a Pipercross air filter. This was a higher figure than I'd expected. Once the map was applied the car was dyno'd a second time, the results were 415bhp and about 440 torque. What is interesting is my friends 340 dyno'd 444bhp.

The guys at DMS had expected the car to come in around the 430 mark and thought the lower number could be for a number of reasons

1, the air flow sensor might have oil on it from the Pipercross air filter, causing it to drop in power, I've now put the oem filter back on.
2, the fuel I'd filled up with the day before is full of additives, causing a drop in power, all the previous cars with higher numbers had apparently used shell v power.
3, the car has less than 8k miles on it, so is still loosening up

I'm no mechanic so have no idea if any of the above could be causing it, or is it simply that no 2 cars will produce the same figures and mine is at the lower end.

415 is still a respectable number so I'm happy, I'm planning a retest once I've ran some shell v power for a while. Just to see if fuel really makes any difference

Southern Jay · 08-15-2018, 06:08 AM

Added pics

chris-c · 08-15-2018, 06:27 AM

We need to check that sensor!

YasM3 · 08-18-2018, 01:30 PM

So many things can affect dyno #s. I would not worry about it. Your car could have been pulling timing, the way the car is strapped on the dyno, tire pressure, type of tires, conditions when both cars were dynoed etc etc etc all will affect #s.

Next, @ 8k miles, the motor is not "loosening" up. It would have made the same power at 1k miles and it will make the same power at 20k miles.

kriszty · 11-03-2018, 05:30 AM

nice gains,

i read at the German BMW forums, that the Pipercross filter ws not that good, there was a worse air flow than the standaard air filter, anyone has more info about this ??

Nugget · 11-04-2018, 09:23 PM

Quote:

Originally Posted by kriszty

nice gains,

i read at the German BMW forums, that the Pipercross filter ws not that good, there was a worse air flow than the standaard air filter, anyone has more info about this ??

They sag and crumble as well.

08-14-2018, 02:50 AM	#1
Southern Jay Captain 539 Rep 643 Posts Drives: F36 440i MSport GC Join Date: Feb 2014 Location: Reading iTrader: (0)	I travelled down to DMS with a friend at the weekend to get our cars mapped, having seen some of the figures quoted I was optimistic for the results, I'd taken the Powerizer off the day before in preparation, I'd also filled up with Tesco memento fuel. The run before the map showed 348 bhp, baring in mind the only mods that could effect this is the Remus cat back system and a Pipercross air filter. This was a higher figure than I'd expected. Once the map was applied the car was dyno'd a second time, the results were 415bhp and about 440 torque. What is interesting is my friends 340 dyno'd 444bhp. The guys at DMS had expected the car to come in around the 430 mark and thought the lower number could be for a number of reasons 1, the air flow sensor might have oil on it from the Pipercross air filter, causing it to drop in power, I've now put the oem filter back on. 2, the fuel I'd filled up with the day before is full of additives, causing a drop in power, all the previous cars with higher numbers had apparently used shell v power. 3, the car has less than 8k miles on it, so is still loosening up I'm no mechanic so have no idea if any of the above could be causing it, or is it simply that no 2 cars will produce the same figures and mine is at the lower end. 415 is still a respectable number so I'm happy, I'm planning a retest once I've ran some shell v power for a while. Just to see if fuel really makes any difference Attached Images __________________ Current mods: Mperformance rear spoiler, diffuser, side vinyls and front grille, non OEM carbon mirror caps, Remus cat back exhaust, Eibach springs, TPI spacers 15mm rear and 12mm front, Maxton side blades and v2 front splitter, Pipercross direct replacement air filter, Remus Powerizer. Current: F36 440i M Sport GC STORMTROOPER Previous: F30 320d M Sport Xdrive STORMTROOPER
	Appreciate 4 chris-c900.50 RustyBitz1573.50 Beek707.00 hudson012003168.50 Tweet Quote

08-15-2018, 06:08 AM	#2
Southern Jay Captain 539 Rep 643 Posts Drives: F36 440i MSport GC Join Date: Feb 2014 Location: Reading iTrader: (0)	Added pics __________________ Current mods: Mperformance rear spoiler, diffuser, side vinyls and front grille, non OEM carbon mirror caps, Remus cat back exhaust, Eibach springs, TPI spacers 15mm rear and 12mm front, Maxton side blades and v2 front splitter, Pipercross direct replacement air filter, Remus Powerizer. Current: F36 440i M Sport GC STORMTROOPER Previous: F30 320d M Sport Xdrive STORMTROOPER
	Appreciate 0 Quote

08-15-2018, 06:27 AM	#3
chris-c Lieutenant Colonel 901 Rep 1,801 Posts Drives: F31 340i RWD Join Date: Feb 2018 Location: Kent iTrader: (0)	We need to check that sensor!
	Appreciate 0 Quote

08-18-2018, 01:30 PM	#4
YasM3 Lieutenant 258 Rep 487 Posts Drives: A BMW Join Date: Apr 2014 Location: Out here iTrader: (0)	So many things can affect dyno #s. I would not worry about it. Your car could have been pulling timing, the way the car is strapped on the dyno, tire pressure, type of tires, conditions when both cars were dynoed etc etc etc all will affect #s. Next, @ 8k miles, the motor is not "loosening" up. It would have made the same power at 1k miles and it will make the same power at 20k miles.
	Appreciate 1 Southern Jay539.00 Quote

11-03-2018, 05:30 AM	#5
kriszty Lieutenant 329 Rep 532 Posts Drives: B58 M240ix pureturbo800 dorch1 Join Date: May 2007 Location: Holland iTrader: (0)	nice gains, i read at the German BMW forums, that the Pipercross filter ws not that good, there was a worse air flow than the standaard air filter, anyone has more info about this ??
	Appreciate 0 Quote