Author Topic: Stock Ecu For Turbo Use (Read 11740 times)

Chris_XIII · « **on:** September 07, 2008, 04:45:45 AM »

Hi, I'm a new member so I don't knew If there excist this topoc... I have a Bmw e30 with m42 engine but the 2 generation. I'm going to put a turbocharger on it
and I don't knew if stock ecu can handle it (ofcourse using biger injectors and remaping stock ecu). Is this possible? Do you knew something about it??:confused:

Jimmy Lewis · « **Reply #1 on:** September 07, 2008, 10:30:01 AM »

You have a whole lot of reading to do. If you have to ask questions like this you are in no position to safely turbo your m42. There is plenty of info available in the very same section that you posted this in, read please.

Chris_XIII · « **Reply #2 on:** September 07, 2008, 10:55:55 AM »

those dayes I've read meny topics but no one tells if stock ecu is remapable. all are using aftermarket ecu. Here in Greece I've seen meny 318is turbo using cosworth electrics and handle meny horspower but some days now I hear that stock m42 ecu can be remapable and it is very good on this. the only thing I want to learn is if it is true. I would appreciate if someone could help me and not telling me "If you have to ask questions like this... ".

AcSchnitzer318is · « **Reply #3 on:** September 08, 2008, 01:23:24 AM »

You can have a custom "piggy back" chip burned... but this is only for low boost situations. Maybe 7psi. And even then you will have better results with full aftermarket fuel and spark management.

Chris_XIII · « **Reply #4 on:** September 08, 2008, 02:23:19 AM »

now I undersand why they change ecu.. do you knew something about someone used it and it is working fine? the problem is that for now I'm out of money...

kowalski · « **Reply #5 on:** September 08, 2008, 04:06:37 AM »

the stock ecu can be remapped for turbo use, but you need to find a shop with the abilities to do so. these days it might be easier to just go with a piggy back, or a standalone.

ose30 · « **Reply #6 on:** September 08, 2008, 05:51:40 AM »

It's not any rocketsciense to remap stock ECU for turbo use. Most difficult tasks are how to handle possible knock & overboost situations. For that there are "boxes" available.Link Electromotives "Knock Link" is one of them.
Most '80's-90's factory turbo Bosch Motronic systems has a paraller box to handle knock & Overboost, for example Porsche had that kind of system. I know few engines which have Porsche 944 Turbo's ECU installed, i suppsoe it is the same kind of installation if you use Sierra Cosworth's Magneti Marelli Ecu as you have desrciped.

Chris_XIII · « **Reply #7 on:** September 08, 2008, 10:14:09 AM »

I'm not sure but I think m42 2 generation has knock sensor, isn't it?? Overboost is not a problem because the engine will work with boost controller and will work with constant boost. My problem is if stock ecu can handle RC 750 cc / min fuel injectors and programming it to have the right mix of air and fuel at deferent RPM...

ose30 · « **Reply #8 on:** September 08, 2008, 10:33:57 AM »

Quote

My problem is if stock ecu can handle RC 750 cc / min fuel injectors and programming it to have the right mix of air and fuel at deferent RPM...

Your ECU does not know what injectors you are using, it's the binary code inside the ECU. Just find a cabale programmer who understands Motronic, or of course you can use some piggy pack boxes (like Perfect Powers SMT6) to alter fuel parameters for bigger injectors.

Chris_XIII · « **Reply #9 on:** September 08, 2008, 11:06:26 AM »

Is this Perfect Powers SMT6 is really so good?Most times engines don't break from pistons, rods ech but from bad ecu programming... Programming is the final and most important part of this project..

kowalski · « **Reply #10 on:** September 08, 2008, 07:25:21 PM »

Quote from: Chris_XIII;56304

I'm not sure but I think m42 2 generation has knock sensor, isn't it?? Overboost is not a problem because the engine will work with boost controller and will work with constant boost. My problem is if stock ecu can handle RC 750 cc / min fuel injectors and programming it to have the right mix of air and fuel at deferent RPM...

correct, 2nd gen m42's have knock sensors.

Chris_XIII · « **Reply #11 on:** September 10, 2008, 01:34:29 PM »

guys, what is writting on stock ecu on it? product make?

kowalski · « **Reply #12 on:** September 15, 2008, 06:36:00 PM »

Quote from: Chris_XIII;56452

guys, what is writting on stock ecu on it? product make?

ok, if you want any one on this board to take the time to answer your question, at least take the time to make it somewhat understandable.
Seriously.

Chris_XIII · « **Reply #13 on:** September 16, 2008, 07:50:55 AM »

Quote from: kowalski;56757

ok, if you want any one on this board to take the time to answer your question, at least take the time to make it somewhat understandable.
Seriously.

Motronic or DME??

ose30 · « **Reply #14 on:** September 18, 2008, 06:18:11 AM »

Does it make any difference? It's Bosch Motronic systems DME box

I can check out later to day, have one extra box somewhere. Most likely there is written Motronic if i can remember correctly, but i suppose you need the Bosch part number ?

hey Mike,
Chris is from Creece, so give him a chance, after all most likely he writes better Greek than me and you