What tune is it that you were on when that happened? ME7 has plenty sophisticated knock sensing logic absolutely. However, it could very well be that the amount of boost+lousy-gas you poured into the motor was far beyond what the design parameters where. The factory calibration is designed to pull some ignition for normal, not-modded, no-boost situation. Indeed if you were jacking WOT with terrible gas and super high intake temps, and lotta boost, well, what is "plenty ignition pull" for a stock car could indeed be inadequate response for yours.
I also agree w/ Thad - the best knock prevention is not getting into knock in the first place! It really should be a "rare malfunction" feature, not a 'bounce off the knock sensors all the time" situation.
That said, some engines - like the S54 - come with factory calibrations that are super conservative for knock and will keep timing way down. One of the first thing any S54 tuner does is to pull the knock limits up and add timing... However that's all based on careful evaluation of that engines operating behavior, and usually entails telling owners "OK this is a 93 Octane tune ONLY..."
Again - not arguing that if you want a big-boost build and have challenging situation (BTW, also I am sure your hot ambient temperatures are ADDING to your gas problems...) that a standalone isn't a good option.
I'm only arguing your suggestion that for EVERYONE stock ECU's can NEVER work for F/I engines.
That is especially NOT true for stock ECU's that are 1. well mapped/understood (and of course I completely agree w/ you that ME7 ... and 5 for that matter... are WAY underdocumented...), or 2. factory-boost ECU's.
ME7 is used on a bunch of boosted cars, just not BMW ME7... Audi's ME7.1 is super well understood and guys have been making tons of power happily and safely on that ECU for almost 20yrs. Even the E36 guys know how to make great power on non-F/I BMW ECU's safely.
2003 M3CicM6 TiAg
2002 540iT Sport Vortech S/C 6MT LSD TiAg
2008 Audi A3 2.0T DSG (the daily beater)
2014 BMW X1 xDrive28i (wifemobile)
Former:
1985 MB Euro graymarket 300SL
1995.5 Audi S6 Avant (utility/winter billetturbobattlewagen)
e39 540i 6speed Supercharged,
E36 v8 m62 with m60 headers, Turbp HX-40 0.6-0.5bar or 9psi, custom exhaust & Turbo manifold, injectors 440cc, ECU Invent EMS-2, Mishimoto Intercooler and oilcooler, etc…
e39 540i 6speed Supercharged,
E36 v8 m62 with m60 headers, Turbp HX-40 0.6-0.5bar or 9psi, custom exhaust & Turbo manifold, injectors 440cc, ECU Invent EMS-2, Mishimoto Intercooler and oilcooler, etc…
I think we are all in agreement that a standalone can usually be easier to have a good forced induction result with than a factory ECU that was intended for a normally aspirated application.
But still, MANY MANY people make BIG power on factory ECUs without blowing up engines, especially in the E36 world (since we are discussing BMWs). Many of the guys using factory DMEs for forced induction in E36s would argue against you that the DME is far better for forced induction than a standalone, and their excellent results make it difficult to argue.
When it comes to E39s though, the DMEs don't play very nicely with forced induction because they are not well understood by us end users.
Remember though, a stadalone ECU is just a tool, and it will do whatever you tell it. A well-done engine tune is critical to a good outcome, whether you have engine-protecting features in the ECU or not. You can DEFINITELY blow up engines with a standalone, even with engine protecting features. I have done it.... Lol
Dove I can tell you right now the problem with your engine blowing up is:
YOUR operating conditions vs YOUR lack of information and tuning ability for the ECU.
We can go around and around on this 100x but your just absolutely wrong saying the factory ECU is inherently unsafe and blows up engines is 100% flat wrong.
I just looked it up for you. Knock detection maps seem to start around 0x9130 in the common 'short' tune files. For each cylinder there are 16 values of RPM to set knock threshold. You can change knock threshold up or down. You can change the axes of the RPM buckets, factory axis goes 560/800/1000/1200 then +400 after that. Each cylinder has a unique map from factory based I'm sure on resonances of the block and rotating assembly. Beyond that if I spent enough time w/ WinOLS I'm sure I could also tell you where the ignition-pull values are to increase the amount of ignition pull back.
You could easily pull down some of those thresholds to stop your engine from pushing limits but - since we all know you pretty well at this point - we ALL KNOW that, even if you had done that when you had that car, you'd immediately be whining at us wahh wahhh your motor makes no power because its constantly knocking like a mutherforker.
The problem is your gas, your car, your air temperatures, your lack of sensible operator detection that the motor was being pushed past its limits. Not the ECU.
Oh and only about a zillion big turbo big power cars out there run without EGT. It is decidedly a 'nice to have' but in NO WAY is a requirement.
The problem is your gas, your car, your air temperatures, your lack of sensible operator detection that the motor was being pushed past its limits. Not the ECU. Or its lack of EGT.
2003 M3CicM6 TiAg
2002 540iT Sport Vortech S/C 6MT LSD TiAg
2008 Audi A3 2.0T DSG (the daily beater)
2014 BMW X1 xDrive28i (wifemobile)
Former:
1985 MB Euro graymarket 300SL
1995.5 Audi S6 Avant (utility/winter billetturbobattlewagen)
Dude, CLASSIC POST!! Lol
And regarding EGT, to me interpreting EGT readings is another whole layer of puzzle pieces to be figured out. It is anything but straight forward.
Bro, read one more time my wordings, I said stock ECU is not for Forcing induction. It has knock mapping, everybody knows it, but the question is whether it is wor or no. It does not properly and that is fact. In my case, all my engines destroyed in combustion chambers due to knocking & heats. If stock ECU works well as you beautifully described above, then we will never get a problem and nobody switched to aftermarket ECU. No one will compromise safety, me too, but my stock ECU does. Knocking is the worst thing which can happen with ECU, it destroys everything and increasing heat in the chamber. ECU can compromise some safety things but not a knocking. For me, that means stock ECU is the worst thing ever I have seen. Noone can change my mind even you BRO.
e39 540i 6speed Supercharged,
E36 v8 m62 with m60 headers, Turbp HX-40 0.6-0.5bar or 9psi, custom exhaust & Turbo manifold, injectors 440cc, ECU Invent EMS-2, Mishimoto Intercooler and oilcooler, etc…
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