Engine Management

[Audi180]

Hi,

I'm planning on buying an m coupe (with the S50B32 engine, with the RGMotorsport supercharger kit, and headwork...)
it has the dastek unichip on it... and people can't tune it right for some reason.. the idle is allways rich, and the car feels choked...

considering that i wanna keep the double vanos, what engine management should i use?
should i get a stand alone or a piggy-back system?

thanks,
Tom

[itsabimmerthing]

Standalone is always going to give you more control over engine parameters. The Bimmer crowd seems to like the Tec3, and the DSM crowd really likes the AEM EMS..... Both are great systems, and should be more than sufficent.

[Audi180]

Can both of them control the Vanos?

[Defacto]

Here's the deal. TEC-IIIR will not control DVANOS. The new box that AEM developed for HPF in the E46 M3 will. You can also contact certain companies, such as Discovery Automotive, for a custom tune of the stock DME. Also, MoTeC makes units that control DVANOS. However, they are rather expensive and difficult to implement, but when they are done, they are top notch.

[MrBlonde]

Talk to www.bavariacars.com.au about an Infinitas kit ..

[tws]

The S50B32 only has vanos on the inlet side (european motor right?), It is a high pressure system running at 100 bar. It is a pauls with modulated signal.
The S54B32 has the vanos on the inlet and exhaust side. 100 bar and a modulated signal. IF it is a Non EVO S50B32 it would be a low pressre system that is an on/off switch that changes cam timing 12.5 deg. of advanve on the inlet side only.

Currenlty running a non EVO S50B32 with a tec3 and I thought that my vaons was coming on, I may be "high" so I'll check and let you know.

TWS

[MrBlonde]

Originally Posted by tws

The S50B32 only has vanos on the inlet side (european motor right?), It is a high pressure system running at 100 bar. It is a pauls with modulated signal.
The S54B32 has the vanos on the inlet and exhaust side. 100 bar and a modulated signal. IF it is a Non EVO S50B32 it would be a low pressre system that is an on/off switch that changes cam timing 12.5 deg. of advanve on the inlet side only.

Currenlty running a non EVO S50B32 with a tec3 and I thought that my vaons was coming on, I may be "high" so I'll check and let you know.

TWS

There is no "euro" motor. There is the real M3 engine that everywhere in the world got, and the boat anchor S52 that the US M3s/M Coupes/M Roadys got, based on the M50 engine.

S50B32 is DVANOS; Double VANOS continuously variable valve timing on both intake and exhaust strokes.

The term "evo" is a marketing term used by BMW UK to distinguish the 3.2 litre S50B32 engine from the 3.0 S50B30.

There is no such thing as a "non EVO S50B32", however the S50B30 only has VANOS on the intake side (continuously variable).

The S50B30 USA engine (3.0 litre US M3 engine) has the two stage VANOS .. not continuously variable. This means the on/off postions. It's an M50 with a few tweaks, not a real "S" series engine.

[MrBlonde]

Originally Posted by itsabimmerthing

Standalone is always going to give you more control over engine parameters. The Bimmer crowd seems to like the Tec3, and the DSM crowd really likes the AEM EMS..... Both are great systems, and should be more than sufficent.

For a street car I challenge this. The factory DME is by far the best ECU for a street car. The thousandas of hours of tuing that have gone into part throttle tuing, etc will never be surpassed by an individualwith a standalone.

What may force you to a standalone is if the DME cannot handle the parameters an FI engine throws at it. In this case a piggyback setup in conjunction with the DME can be a good solution.

By the time you go standalone you're close to saying it's no longer a street car.

[Defacto]

Originally Posted by MrBlonde

For a street car I challenge this. The factory DME is by far the best ECU for a street car. The thousandas of hours of tuing that have gone into part throttle tuing, etc will never be surpassed by an individualwith a standalone.

What may force you to a standalone is if the DME cannot handle the parameters an FI engine throws at it. In this case a piggyback setup in conjunction with the DME can be a good solution.

By the time you go standalone you're close to saying it's no longer a street car.

I beg to differ...well, on certain fronts. For a motor like an S50B32, S54, etc...i completely agree. However, if you're tuning a non-VANOS or a dual stage VANOS motor like an S52, etc...I think that a standalone can be a perfectly streetable solution. I can testify that my TEC-IIIR system behaves much better than the stock ECU ever did on my M6 when it was bone stock...and the car was 100% healthy bone stock (put down extremely healthy power numbers). However, it doesn't have DVANOS to contend with. Also why I think that a standalone can still be an excellent solution for an E36M3 (US). When it really starts getting complicated...I am all in favor of doing something like what HPF did with the E46 M3 running that "Piggyback" system (I put it in quotes because it is definitely a step beyond piggyback). So, in summation, I agree that stock DME or "Piggyback" is good for very complicated hardware systems needing control...for more simple systems, however, I think that a standalone can be far superior.

[MrBlonde]

Originally Posted by Defacto

I beg to differ...well, on certain fronts. For a motor like an S50B32, S54, etc...i completely agree. However, if you're tuning a non-VANOS or a dual stage VANOS motor like an S52, etc...I think that a standalone can be a perfectly streetable solution. I can testify that my TEC-IIIR system behaves much better than the stock ECU ever did on my M6 when it was bone stock...and the car was 100% healthy bone stock (put down extremely healthy power numbers). However, it doesn't have DVANOS to contend with. Also why I think that a standalone can still be an excellent solution for an E36M3 (US). When it really starts getting complicated...I am all in favor of doing something like what HPF did with the E46 M3 running that "Piggyback" system (I put it in quotes because it is definitely a step beyond piggyback). So, in summation, I agree that stock DME or "Piggyback" is good for very complicated hardware systems needing control...for more simple systems, however, I think that a standalone can be far superior.

Yes I agree with that.

[tws]

Considering that I am a dumb American that does not know what a "real" motor is like could you fill me in on what year S50B32 we are talking about here.

TWS