Denny's M62B44 swap (MS2 installed First start VIDEO inside)

[Denny]

Radiator installed, MS2 arrived

Z4 M coupe OEM radiator installed

flex-a-lite 16" electric fan installed

MS2 V3.57 with all the goodies even the infamous IAT sensor lolll (my experience tuning was limited to Forced induction cars all my life so news to me its needed so importantly for timing in N/A but I would install it anyways for extra protection too.)

8 feet of wiring..

going to be fun I love wiring jobs..

Coolant expansion tank...with some nice mounts :) who needs a 18 anyways

looks like I will have to remove and tap the coolant passage for the (Brown 1 pin oem gauge sensor and GM Coolant temp) 2 nice spots right there thanks BMW

[The Dark Side of Will]

The IAT sensor still have to determine location but it will be easy and if indeed its used for density (I tough air measurement was MAF related and integrated) and that MAP and TPS was the best way to measure Fuel but we learn something everyday thank you for sharing I appreciate it :) saved me some time...

In a speed-density system, the IAT is an integral part of the air density calculation, which drives the air mass calculation. IOW if you run with MAP/TPS but no IAT, you'll have to retune every time the ambient temperature changes.

In a MAF system, the IAT is not used significantly in the air mass calculation because the MAF measures air mass directly.
In a MAF system, the IAT has only a small influence on the fuel calculation, because ambient temp affects the vaporization rate of the fuel.

In both systems, IAT affects ignition timing.

[dirtysix]

Oh yeah. Forgot to mention that....
Think you need to create an exception for that site or something from memory.

[Denny]

All your pinouts and info will be here if you haven't found this site yet http://www.bmw-planet.com/diagrams/r...9old/index.htm

A6000 is the ecu number and X6000 the ecu connecter. Dunno if it's any help but anyway.

Also, IAT sensor is located inside the airbox post filter in an E39.

Thanks man appreciate the link... this looks very promising...just need to fix my security setting to accept java for the website its not loading :(

[dirtysix]

All your pinouts and info will be here if you haven't found this site yet http://www.bmw-planet.com/diagrams/r...9old/index.htm

A6000 is the ecu number and X6000 the ecu connecter. Dunno if it's any help but anyway.

Also, IAT sensor is located inside the airbox post filter in an E39.

[Denny]

The IAT sensor is important for NA cars as well, it's used in the fueling algorithm to determine the mass of the incoming air. It could also retard timing, but primarily it's used as one of the two variables in determining injector pulse width.(MAP and IAT) It's going to get heat soaked behind the throttle body, it's somewhere further toward the incoming air in most cars.

After more research done ...hard to find information on these BMW COP,s I think you are correct... Signal wire is the one that MS grounds to activate spark. If this is correct and I think your right on the money on this nothing is lost so far...all I have created with the ground wires so far is a complicated for nothing but still ok not have to be redone. I will just do the signals wires in wasted spark mode as I have not cut them off.

The IAT sensor still have to determine location but it will be easy and if indeed its used for density (I tough air measurement was MAF related and integrated) and that MAP and TPS was the best way to measure Fuel but we learn something everyday thank you for sharing I appreciate it :) saved me some time...

[smalcol]

The IAT sensor is important for NA cars as well, it's used in the fueling algorithm to determine the mass of the incoming air. It could also retard timing, but primarily it's used as one of the two variables in determining injector pulse width.(MAP and IAT) It's going to get heat soaked behind the throttle body, it's somewhere further toward the incoming air in most cars.

[smalcol]

Hi Denny, I don't think that wiring is right for the stock COPs. I'm sure it's not actually. They are three wire coils, they need constant ground and power(green and brown), the other colored wires on each coil are the trigger that should be wired to your quad spark.

[Denny]

Hi Denny,
I am using the GM IAT sensor as well, I just mounted it into the intake tube, that's where it is stock on the M62. I'm not sure where it would go after the TB, but go for it if there is a place, you want it right in the path of incoming air. I don't think it's for safety, as far as I know, megasquirt uses this to calculate the air density and thus the fueling rates.

I'm using the same coil drivers as you, quad spark, I have two of them mounted inside the cabin on the firewall. They are wired for sequential in my set-up, but set to run in wasted spark in the MS3, it works. I also used the stock harness after the quad spark, it's shielded.

Anyways, my theory is that the COP's are causing the misfire because they are running in wasted spark. That's why I'm interested in how yours ends up working. I need to get my cam sensor working which would rule out that theory. I'm still a bit sick of troubleshooting signals to the MS3 after a bunch of problems with the crank VR sensor initially, so I've put it off.

Hey thanks for your input! :) For my setup and my experience that the IAT sensor is "mostly important" for F/I setups to retard timing when air temps get too high but for N/A its less important. Fueling rates will be 50% TPS / 50% MAP for me. Coolant sensor will determine cold start, hot start fuel and timing. The VR sensor since its a 2 Pin needs extra shielding for noise and that I got it cover very nicely. For the OEM COPS I finished wiring it all wasted spark Mode (Brown=MS2 Green=12V and (?colors)=not used ) with 1 QuadSpark box. I will loom all the wires and make it clean and nice once the engine starts :devil:

[smalcol]

Hi Denny,
I am using the GM IAT sensor as well, I just mounted it into the intake tube, that's where it is stock on the M62. I'm not sure where it would go after the TB, but go for it if there is a place, you want it right in the path of incoming air. I don't think it's for safety, as far as I know, megasquirt uses this to calculate the air density and thus the fueling rates.

I'm using the same coil drivers as you, quad spark, I have two of them mounted inside the cabin on the firewall. They are wired for sequential in my set-up, but set to run in wasted spark in the MS3, it works. I also used the stock harness after the quad spark, it's shielded.

Anyways, my theory is that the COP's are causing the misfire because they are running in wasted spark. That's why I'm interested in how yours ends up working. I need to get my cam sensor working which would rule out that theory. I'm still a bit sick of troubleshooting signals to the MS3 after a bunch of problems with the crank VR sensor initially, so I've put it off.

[Denny]

Hi Denny, I don't see an IAT sensor plan, does MS2 not have this?

yeap for sure can never have enough safety..its not on my chart yet but I plan on running it in that nice location right after the TB (hope it just screws right in the place with same thread) Im going to use the GM one.

I'm also very interested in how your COP's end up working in this configuration. I'm using the stock COP's as well on my M62, using the same drivers, wasted spark with MS3. I've got it wired up for sequential, but haven't gotten around to getting the cam sensor to work right, thus wasted spark for now. I have a hard to diagnose miss/misfire at higher RPM's that I'm wondering is due to running these too hard. (wasted spark)

I suspect your Drivers are running HOT.. What setup do you have to them? are you using a good Heatsink? Location? Im going to use the QuadSpark from Diy (nice heatsink box made just for them I can hide away from the heat)

How did you wire the COPS in Wasted spark mode? Green(Power)- Brown (Ground) - signal (???).

[smalcol]

I'm also very interested in how your COP's end up working in this configuration. I'm using the stock COP's as well on my M62, using the same drivers, wasted spark with MS3. I've got it wired up for sequential, but haven't gotten around to getting the cam sensor to work right, thus wasted spark for now. I have a hard to diagnose miss/misfire at higher RPM's that I'm wondering is due to running these too hard. (wasted spark)

[smalcol]

Hi Denny, I don't see an IAT sensor plan, does MS2 not have this?

[Denny]

Getting wiring prepared for MS2 which I should have on March 28 :)

Cant wait to fire this beast...my timeline is to get it started by end of March...

[Denny]