Author Topic: Will The Stock ECU Adapt to ITB's? (Read 15893 times)

badboypolar · « **Reply #15 on:** July 24, 2007, 10:05:47 PM »

Is that dump from the ROM in the ECM?

DutchM42 · « **Reply #16 on:** July 25, 2007, 03:07:28 PM »

Quote from: 16v of Fury;30225

I'm talking about a set of the Dbilas ITB's --- they already have an airbox and are a "bolt-on" item.

Do you have an M42 there in Canada to play with, Mark... ?

These Dbilas ITB's are combined with a remap of the ECU by Dbilas on their rolling road. Or if you want to install them yourself find yourself a chiptuner and a rolling road. A friend of mine had these ITB's installed by Dbilas and it runs great.

ScreamerBeemer · « **Reply #17 on:** August 25, 2007, 10:28:29 PM »

So, I my mind got to wondering, which it does alot, how easy do any of you think an s14 ecu work with an m42 with ITB's? Similar sized motors and the itb's are factory on the s14. I know nothing much about the s14. I figured its a good question for some of you beemer gurus.

BrandC · « **Reply #18 on:** August 26, 2007, 06:34:04 PM »

Quote from: ScreamerBeemer;32476

So, I my mind got to wondering, which it does alot, how easy do any of you think an s14 ecu work with an m42 with ITB's?

It's not going to be easy or beneficial to use S14 engine management. Better to just go stand-alone, Megasquirt if anything.

D. Clay · « **Reply #19 on:** August 26, 2007, 07:09:27 PM »

bmwman91 · « **Reply #20 on:** August 26, 2007, 07:31:39 PM »

Quote from: D. Clay;32525

Sheepdog, we need a crazy drooling smiley, stat.

e30s4evr · « **Reply #21 on:** August 26, 2007, 07:46:28 PM »

This picture has been my screensaver for months now!

Mannix · « **Reply #22 on:** August 26, 2007, 09:50:06 PM »

I don't get why the car would care if the throttlebody/plenum manifold were replaced with ITBS which have a plenum.

The MAF tells the motor how much air goes in, TPS is doing it's thing, O2/coolant/crank/cam sensors doing their thing.

Would it likely be BETTER after optimizing the maps for the shorter runners? Sure. Would it run? I can't think of why it'd NOT run - air in, fumes out, shrug, dunno.

The motor does not know if there are ITBs or a single tb/plenum - it'd change some dynamics at certain parts of the rev range, ehhhh, I think it'd work fine.

Iain

Boyracer · « **Reply #23 on:** August 31, 2007, 03:57:06 AM »

Quote from: Mannix;32539

I don't get why the car would care if the throttlebody/plenum manifold were replaced with ITBS which have a plenum.

The MAF tells the motor how much air goes in, TPS is doing it's thing, O2/coolant/crank/cam sensors doing their thing.

Would it likely be BETTER after optimizing the maps for the shorter runners? Sure. Would it run? I can't think of why it'd NOT run - air in, fumes out, shrug, dunno.

The motor does not know if there are ITBs or a single tb/plenum - it'd change some dynamics at certain parts of the rev range, ehhhh, I think it'd work fine.

I seem to remember something about acceleration enrichment :confused:

Something to do with the rate of air entering the engine depending on throttle plate angle when quickly pressing throttle pedal or such. There could be constant on ECU for stock throttle body and if you change it to different, there might be problems on acceleration.

So if you change to ITB's which open faster than stock throttle body, quickly pressing the throttle pedal might cause AFR to go lean because ECU is not injecting enough extra fuel compared to air.

Someone correct me if I'm talking bollocks

ose30 · « **Reply #24 on:** August 31, 2007, 04:58:23 AM »

Yes you're more or less right. If you change original TB to ITB Motronic does not know that. So you must rewrite the program also to match ITB's accleration enrichment. Also when you step on it and have WOT function, Motronic jumps to WOT map in the code, so you need to rewrite also that part. More or less the whole code needs to rewrite to match the new setup, if not, more or less problems will occur, but it can be done (has been done) so no need to go megasquirt or similar. In most cases Motronic is the way to go. If you use standalone systems, you got a new hobby, because these standalone systems need a lot of work to operate like original systems does.

Froos · « **Reply #25 on:** June 09, 2017, 01:08:07 PM »

So any new insight on this? Saving for a stand alone ecu and in the time beeing i can only run half throthle

bmwman91 · « **Reply #26 on:** June 13, 2017, 01:43:41 AM »

Check in with Jay at SSSquid Tuning. I have learned a lot about the Motronic 1.7 and it definitely can run an engine with ITB's. BUT, it needs to be remapped, and you are going to need a professional tuner to do it if you want it to run as well as stock while also making optimal power. Jay should be able to do the required work on the idle, part-throttle and full throttle maps. You can probably get the tune 90% dialed in remotely before needing to think about dyno time.

I am doing a remote tune with him now, which means him sending experimental tunes, me burning them and then collecting run data. At the very least you will want some way to log AFR, so that means a wide-band O2 system that can also emulate the stock O2 sensor for the stock ECU to use (the Spartan Lambda Controller from 14point7 is a good unit). 14point7 also sells slightly more advanced systems which control the wide-band sensor and also log it along with RPM. Ideally you would be logging AFR, EGT and RPM for a remote tune.

Anyway, check out SSSquid tuning. Jay takes his work seriously and knows what he is doing.

Froos · « **Reply #27 on:** June 15, 2017, 06:12:40 AM »

Hey bmwman91, thanks for that! I wonder if it better that getting a standalone unit but defo worth considering, ill check them out

bmwman91 · « **Reply #28 on:** June 18, 2017, 03:11:59 PM »

Stand-alone is probably going to be better in every way in terms of tuning flexibility and modern features. BUT, the hardware will be like 4x the cost of a custom tune, and then you still need a custom tune. Additionally, if you plan to go stand-alone, you would really want to consider integrating a wide-band O2 system, a MAF or MAP sensor, fully sequential injection and then driving the ignition coils would require an external igniter module OR a conversion to VW "pencil" coils since they take a logic-level signal and fit in the M42 head. It would be a ton of work and much of it owuld involve wiring harness mods which take some degree of expertise.

A custom tune is a lot more straightforward. You would probably need to install a wide band O2 sensor for logging, but that is relatively cheap and easy (the Spartan SLC from 14point7 is cheap, and it provides a simulated narrow-band signal for the stock ECU).

Froos · « **Reply #29 on:** June 19, 2017, 12:21:43 PM »

Hello bmwman91. I think finding someone that can tune an old computer is probably expensive.
The system im saving for will have a wideband lamda, ev14 injectors, coil on plugs from vag,and all the sensors needed are already on the car, minus the barndoor. What the guy told me a map or maf sensor in not needed if you have inlet temp sensor. Cables and connectors, and the above (minus injecors) all for 750�

Author Topic: Will The Stock ECU Adapt to ITB's? (Read 15893 times)

badboypolar

Will The Stock ECU Adapt to ITB's?

DutchM42

Will The Stock ECU Adapt to ITB's?

ScreamerBeemer

s14 ecu

BrandC

Will The Stock ECU Adapt to ITB's?

D. Clay

1000 words.

bmwman91

Will The Stock ECU Adapt to ITB's?

e30s4evr

Will The Stock ECU Adapt to ITB's?

Mannix

Will The Stock ECU Adapt to ITB's?

Boyracer

Will The Stock ECU Adapt to ITB's?

ose30

Will The Stock ECU Adapt to ITB's?

Froos

Re: Will The Stock ECU Adapt to ITB's?

bmwman91

Re: Will The Stock ECU Adapt to ITB's?

Froos

Re: Will The Stock ECU Adapt to ITB's?

bmwman91

Re: Will The Stock ECU Adapt to ITB's?

Froos

Re: Will The Stock ECU Adapt to ITB's?