335D Remap Question... - BMW 3-Series (E90 E92) Forum

335DJim · 10-25-2008, 03:23 PM

If you take a standard 335D and put it on the rollers, then map it and repeat the process will that give you the new BHP figures straight away or do you have to wait for a number of miles for the car to readjust to the new map?

My remapper is claiming a rolling road before and after test is academic based on the above reasoning? - I thought only petrol cars behaved like this?

Cheers,

Jim

BoBBoB · 10-26-2008, 02:23 AM

I'm sure a few people will chip in here, but you should be able to see the improvement in bhp immediately. You can certainly feel the difference straight away, so it should be measurable. Some may argue that over a few miles the car readjusts and you get even better performance.

dxb335d · 10-26-2008, 06:52 AM

Jim is this a post from like a year ago thats re-appeared?

Thought you would know this already.

Imran@Evolve · 10-28-2008, 08:51 AM

Quote:

Originally Posted by 335DJim

If you take a standard 335D and put it on the rollers, then map it and repeat the process will that give you the new BHP figures straight away or do you have to wait for a number of miles for the car to readjust to the new map?

My remapper is claiming a rolling road before and after test is academic based on the above reasoning? - I thought only petrol cars behaved like this?

Cheers,

Jim

The power gains will be there immediately on a derv.

dxb335d · 10-28-2008, 10:05 AM

They shuld be immediate on most cars.

You have upped the boost and adjusted fueling, it aint like lighting a blue touch paper.

335DJim · 10-30-2008, 06:48 PM

Thanks, need to get the map put back on which is no problem (blanked by an iDrive update)- but while I was at the place I wondered if they could do a rolling road now its back to stock and then again afterwards to see the delta - they told me about the 'Time to adjust' thing and said it wouldn't give accurate results so no point..

Think Imran has answered my question - its a worthwhile excersize..

Cheers,

Jim

Jude1 · 10-30-2008, 06:53 PM

If you've had it mapped where I think you have then their rolling road results are a waste of time.

Get it tested independantly on a Dyno Dynamics or similar before and after. You should definitely see gains, but peak figures don't always give an indication of how good a map is.

Jules.

10-25-2008, 03:23 PM	#1
335DJim Private First Class Drives: 335D Coupe Join Date: May 2007 Location: West Midlands Posts: 124 iTrader: (0)	335D Remap Question... If you take a standard 335D and put it on the rollers, then map it and repeat the process will that give you the new BHP figures straight away or do you have to wait for a number of miles for the car to readjust to the new map? My remapper is claiming a rolling road before and after test is academic based on the above reasoning? - I thought only petrol cars behaved like this? Cheers, Jim
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10-26-2008, 06:52 AM	#3
dxb335d The Tarmac Terrorist Drives: E46 M3 Tiag/Imola Join Date: Mar 2007 Location: ''Fandango Towers'' Posts: 28,962 iTrader: (3) Garage List 2003 BMW E46 M3 [3.00] 2007 BMW E92 335D [2.75]	Jim is this a post from like a year ago thats re-appeared? Thought you would know this already. __________________

10-28-2008, 10:05 AM	#5
dxb335d The Tarmac Terrorist Drives: E46 M3 Tiag/Imola Join Date: Mar 2007 Location: ''Fandango Towers'' Posts: 28,962 iTrader: (3) Garage List 2003 BMW E46 M3 [3.00] 2007 BMW E92 335D [2.75]	They shuld be immediate on most cars. You have upped the boost and adjusted fueling, it aint like lighting a blue touch paper. __________________

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10-26-2008, 02:23 AM	#2
BoBBoB Second Lieutenant Drives: Clio 200 Full Fat Join Date: Jul 2007 Location: Oxfordshire Posts: 270 iTrader: (0)	I'm sure a few people will chip in here, but you should be able to see the improvement in bhp immediately. You can certainly feel the difference straight away, so it should be measurable. Some may argue that over a few miles the car readjusts and you get even better performance.

10-30-2008, 06:48 PM	#6
335DJim Private First Class Drives: 335D Coupe Join Date: May 2007 Location: West Midlands Posts: 124 iTrader: (0)	Thanks, need to get the map put back on which is no problem (blanked by an iDrive update)- but while I was at the place I wondered if they could do a rolling road now its back to stock and then again afterwards to see the delta - they told me about the 'Time to adjust' thing and said it wouldn't give accurate results so no point.. Think Imran has answered my question - its a worthwhile excersize.. Cheers, Jim

10-30-2008, 06:53 PM	#7
Jude1 Captain Drives: 3 Series Join Date: Apr 2008 Location: Everywhere Posts: 690 iTrader: (1)	If you've had it mapped where I think you have then their rolling road results are a waste of time. Get it tested independantly on a Dyno Dynamics or similar before and after. You should definitely see gains, but peak figures don't always give an indication of how good a map is. Jules.