ISUK

The lack of diagnostic detection was most likely pre i-drive. The diagnostic sofware now used is more complex due to the functions controlled by this significant leap forward in technology. The fact that version 14 has caused the heated rear seats to cease to function in Iceman's car must indicate how much our cars now rely upon the programming. I would certainly ask a friendly techie at a dealer for guidance on exactly what the diagnostic system can detect before embarking on any major mods that could invalidate your warranty.

I may be being over cautious but having had an unmod'ed diesel engine fail in my car at 16,000 miles I certainly wouldn't want to have given BMW any opportunity to walk away from the cost of replacing it.

Steve Gill

I would suggest this is an argument for a tuning box type device (www.tuningbox.com) - I've had two of them, driven well over 170,000 miles with them and found them superb. Does take 5 mins or so to remove, but worth it so that the car is going in for service without a trace.

As I understand it the tuning box only affects the fueling - not the boost?

skaffa

Yip, read that but am worried that perhaps we are pushing it to the limits now? If skaffa can get 311bhp from a 530d, will we see equivalent gains from a 535d, or is the auto box and/or other components going to hold us back?
[/quote]

Engine is "same" in 530d and 535d, so is the boost, but what makes 535d more powerfull is longer lasting boost in upper end of map. Tuners usually want to take time with they testing of new car so that they don't get out of business because of blown engines etc.

No significant increase of boost, just longer lasting. My hp increase was gained also without increasing of boost.


e60 has more than one computer. iDrive and engine management are two different computers MAYBE connected by bus Through OBD it's not possible look maps inside motor ECU. Engine management sytem has no operation system at all. iDrive has Windows CE based OS.

Do anyone remember dispute between BMW and M$ executives??

Skaffa

clived

I don't think that's quite correct - in so far as the 535d certainly has engine components that the 530d does not - the 2nd turbo charger, which of course enables the higher boost higher in the rev range - where the first turbo would have totally run out of "puff" - it just couldn't push a greater volume of air due to it's smaller size (which of course helps it spin up quicker than the larger one and therefore avoid the lag associated with one large turbo...)

Sooooooo, I'd expect tuning 535d to achieve both higher power and a wider torque spread than tuning a 530d.

Bangle, don't agree with your 10%, as this would give a tuned 535d less power than skaffa's tuned 530d, and I'm sure that's not right!

Cheers, Clive

Guest

Hi
Also 535 has lower compression,"cracked" conrods etc.
Regards

BangleBox_530d

I don't believe the 530d can be increased from 218 BHP to 311 BHP simply from fueling differences. In fact I would doubt that increasing boost with the standard turbo would get to that power.

How realistic is 218 BHP. Is that very conservative. If so, is 272 BHP for the 535d also conservative.

It will be interesting to see what the tuners go to print with, regarding the 535d.

skaffa

I don't think that's quite correct - in so far as the 535d certainly has engine components that the 530d does not - the 2nd turbo charger, which of course enables the higher boost higher in the rev range - where the first turbo would have totally run out of "puff" - it just couldn't push a greater volume of air due to it's smaller size (which of course helps it spin up quicker than the larger one and therefore avoid the lag associated with one large turbo...)

Sooooooo, I'd expect tuning 535d to achieve both higher power and a wider torque spread than tuning a 530d.

Bangle, don't agree with your 10%, as this would give a tuned 535d less power than skaffa's tuned 530d, and I'm sure that's not right!

Cheers, Clive
[/quote]
Clive if You look carefully my post You see "Engine is "same" in 530d and 535d" or gues that I ment same basic engine: block, head... valve cover . You know what I ment.

Also:
"what makes 535d more powerfull is longer lasting boost in upper end of map."

Power=work / time -> Power = torq x speed

Where:

Power = W = Nm/s (1000 W = 1kw =1,36 hp)
torq = Nm
speed = engine speed (rad/sec) (rad = pi x 2 x round/sec)


So, more speed with same torq = more power. Easy my dear Watson.

Sorry but I had to do this.

Skaffa

skaffa

Also removing torq limitter and BMW has "over boost" program in ECU. This gives more power with lower rpm and torq limitter cuts it off with higher rpm. Ok this means that I have now more boost with higher rpm.

FYI

BMW 535d E60 (200 kW / 272 PS) Datenblatt

Tuning-Kit
BMW 535d E60 (200 kW / 272 PS)

Serie / Optimiert
Leistung 200 kW / 272 PS 240 kW / 326 PS + 40 KW / + 54 PS
Drehmoment 560 Nm bei 2000 U/min. 620 Nm bei 2000 U/min. + 60 Nm
H?chstgeschwindigkeit 250 km/h 250 km/h + 0 km/h


This can be found:

http://www.speed-buster.de/index_chiptuning.html

Skaffa

BangleBox_530d

Speed Buster website also says the 530d increased form 217PS to 255PS. So how is it that your chip gets 311 BHP. Somehting doesn't add up.

535d shows a 20% increase though. Very nice indeed.

So either your turbo is puffing as hard as a 535d, or the numbers are wrong. I'd like to think my 530d is getting 250 BHP as standard, but I don't think I'd be that lucky.

skaffa

I try to find correlation formula between hp and acceleration. I had it in my Casio many years ago, but battery has gone empty.

Drag racers have simple formula to calculate hp from 1/4 mile time to have an idea of they engine power, how sippery track is etc.

Anyone?

Skaffa

BTW I have suspicions also untill I get reliable 0-100kph and 1/4 mile times.