Stand Along ECU ?'s

[paul e]

>>I really I want to get to 12 Psi <<

I really dont think you do! 11 psi would be a better max, supported by some charge air cooling.

>Is 170 F Intake Air Temp to Hot?<<

Its typical of SC cars without charge air cooling.. Is it too hot for what? Too hot for good power? yup.. Too hot for good, safe engine running with max advance without pinging? yup. Too hot to not install some charge air cooling? Definitely yup

[Jimmyz2]

"guess from who?
Quote:
I love his hardware , hate his software.I have finally liberated myself from Osh. I am getting Nick G software tomorrow. Cannot wait.Nick G's reputation and courteous service to me makes know the oldtime a-holes are out, and the new generation Nick G's of the world are in.. "

I'd say from Nick's Dad. Sorry for the OT.

[littlefeat]

Originally Posted by NickG

Wow, talk about resurrecting an old thread........lots of things have happened that makes some of the info given in this thread outdated.

Chad, your AFR values actually look pretty darn good. There really isn't anything needing change there.

I am now able to reprogram the MS41 OBD2 BMW ECU to handle DOUBLE (or any factor actually) the airflow of stock. This means the ECU can now handle airflow readings as high as 2000+kg/hr. I can effetively use any mass air meter that I like, because I have complete control of the ECU's code and maps. No more clamps or fancy electronics required in order to run high-capacity meters, which means no Check Engine lights either

As an example, in my OBD2 turbo kits, I'm using a custom calibrated blow through mass air meter (which I specify the flow curve to) that can measure over 500hp worth of airflow before 'maxxing' out. When I install it on my stage1 kits (running 8psi), the signal only gets to around 3.85v. The meter still has PLENTY of range left before going static. This also means that the ECU can adjust the mixture for different boost levels and ambient conditions, since the MAF has the resolution to detect the differences.

I am now able to reprogram the MS41 OBD2 BMW ECU to handle DOUBLE (or any factor actually) the airflow of stock. This means the ECU can now handle airflow readings as high as 2000+kg/hr. I can effetively use any mass air meter that I like, because I have complete control of the ECU's code and maps. No more clamps or fancy electronics required in order to run high-capacity meters, which means no Check Engine lights either

As an example, in my OBD2 turbo kits, I'm using a custom calibrated blow through mass air meter (which I specify the flow curve to) that can measure over 500hp worth of airflow before 'maxxing' out. When I install it on my stage1 kits (running 8psi), the signal only gets to around 3.85v. The meter still has PLENTY of range left before going static. This also means that the ECU can adjust the mixture for different boost levels and ambient conditions, since the MAF has the resolution to detect the differences.[/QUOTE]

Dear Nick

I'm new on this forum so I'm just getting to know some of the members and how they are tuning the obd ii M3. What type of sensor are you using to widen the airflow range? At what airflow ( CFM or kg/hr) will it reach the opp limit? I'm assisting a young man with a turbo project and we will be researching many avenues.



LF

[NickG]

Originally Posted by littlefeat

Dear Nick

I'm new on this forum so I'm just getting to know some of the members and how they are tuning the obd ii M3. What type of sensor are you using to widen the airflow range? At what airflow ( CFM or kg/hr) will it reach the opp limit? I'm assisting a young man with a turbo project and we will be researching many avenues.

LF

The mass air sensor I'm using is proprietary and custom made to my specs. The sensor can be used because I'm able to change the actual operating code, not just the maps, in the MS41 ECU, to handle the increased flow.

[EpDarks]

Nobody has mentioned AEM EMS yet? Not bad at a grand or so...

[Dado]

it's just coming out for the bmw. Not much info on it yet.

[littlefeat]

Originally Posted by NickG

The mass air sensor I'm using is proprietary and custom made to my specs. The sensor can be used because I'm able to change the actual operating code, not just the maps, in the MS41 ECU, to handle the increased flow.

Very nice.

What do you mean by opperating code? In the sensor or the ecu?

[driftspin]

Finally i found a topic on the right subject. :-)

I read a few things here off my intrest and need some advice please.

I live in The Netherlands and want to go for a rotrex setup.
I prefer the front mounted I/C setup. I am aiming for the 320 Hp mark
The car is a sub 100K miles 328i 1999.

The kit is somewhat like the AA kit.
The thing is, i have some doubts about the tune the tuner offers here.

After setting up 8PSI with bigger injectors and frontmount intercooler.
They want to go for the added resistor setup on the sensor / oem ECU.
Then remapping/programming the ecu to get it working together.

I understand AA connects the airflow meter without any mods.



Some questions were asked before but awnsers are not quite clear to me yet.

1 Can the oem ecu handle the Supercharger setup? and if yes does it calculate or guestimate the injector and ignition timing in the higher rpm range under load or can it really measure the airflow with the oem sensor?
Or can i use the M3 / M5 sensor orso and hook that one up to the ecu?

Ive heard when the ecu is "tricked" (by a resisitor for example) it is remapped 1 dimensional and wont compensated the variables like outside temp cold start and so on.

and some less important questions

2 Do i really want the frontmount intercooler? AA does a 320 hp setup w/o front mount.

3 I hear rumors about rear axles that have intensional weakpoints is this true? I cant find any info on this subject

4 Can i use the e46 330 clutch (and twinmass flywheel if needed) on the m52 engine?

Thanks in advance
Driftspin



PS the car is a daily driver but will be driven hard 10% of the time maybe some circuit visits so i want a reliable but cost effective way to tune this setup.

If aftermarket ecu or any add-ons do the job it might be a good solution too.