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

[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.

[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...

[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]

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]

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

[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.

[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

[MonkeyMadness]

[B] [/URL][/CENTER]
Coolant expansion tank...with some nice mounts :) who needs a 18 anyways

Are you fucking kidding me right now? That is some hard core Fab work right there! :loco:

[Denny]

1K worth of Computer Engine management... and all you see is a 1$ socket used as a spacer

LOLLL..ok ok I will at least paint it:devil:

[CMart]

Awesome progress can't wait to see you get it running.

[Denny]

Awesome progress can't wait to see you get it running.

Thanks Bro...almost there ... :)

More wiring done...etc....

• MS2 12V DONE(To battery direct for testing purpose for now) + 5A FUSE
• Grounds DONE + Engine
• MAP DONE
• INJ Bank 1 DONE + 10A FUSE
• INJ bank 2 DONE + 10A FUSE
• COP Bank 1 DONE + 30A FUSECOP Bank 2 DONE + 30A FUSE
• TPS DONE
• IAT DONE
• COOLANT DONE
• VR +/- DONE
• Starter DONE

Almost finished:

• IAC
• Alternator
• COP power
• INJ 1 and 2 Power
• Fuel Pump
• Wideband
• QuadSpark

I re-used the bmw M20 Coolant sensor just had to get the ohms-Temp good old fashioned way...beats having to remove and TAP rear coolant pipe..

every wire is Crimped and heat shrink (doing TPS in this picture)

IAT in the stock Air pipes..just did a rubber Gromet for it... factory look.

more to come... at this point (without Fuel and spark) I will start testing the sensor with MS2 plugged direct to battery to see if everything is ok so far.... then I will test SPARK and end with Fuel.

[GAbOS]

Very interested in the MS2 results. Keep it up!

[MX339]

You've probably got it figured out by now, but here's the wiring schematic for the E36 M42's which also use three wire coils. The M50 (which uses the same COP as the M62) diagram is the same, but the M42 diagram is a little easier to decipher.


I still don't understand it entirely. You've got the power coming from the igniters in the DME and the ground wire. The one I don't understand is the wire coming from the ignition switch. Is it just a constant 12v source for the coil to charge?

I'm actually using some VW coils with built in igniters for my Microsquirt unit, so I've been poking around the wiring diagrams to see what wiring I can reuse in my harness.

[Denny]

Awesome progress can't wait to see you get it running.

Very interested in the MS2 results. Keep it up!

Last night I plugged in my laptop to read the sensors done so far.. gave 12V to MS and everything looks good so far expect my TPS... (can only read from 20% to 70% so I will check this tonight and update..

You've probably got it figured out by now, but here's the wiring schematic for the E36 M42's which also use three wire coils. The M50 (which uses the same COP as the M62) diagram is the same, but the M42 diagram is a little easier to decipher.
I still don't understand it entirely. You've got the power coming from the igniters in the DME and the ground wire. The one I don't understand is the wire coming from the ignition switch. Is it just a constant 12v source for the coil to charge?

I'm actually using some VW coils with built in igniters for my Microsquirt unit, so I've been poking around the wiring diagrams to see what wiring I can reuse in my harness.

I still have to test this out for spark when I do the wasted spark quadspark setup but so far from the ones that I talked too... 3 PINS (Greens=Constant 12V Browns=Constant Ground to heads (other PIN different colors) goes to MS.

[Denny]

more wiring...more testing.... making good progress

Calibrated the TPS to perfection.. I connected Starter and Cranked engine over to check for RPM (means the VR is reading correct :) Got 150 rpm and 3inches of Vaccum which is good but not great and I was wondering what the problem was ...well I found it :) The ICV was open so that creates a a vacuum leak hence why my vaccum test was just ok... I`m going to wires the ICV and tested it....closed it and recrank few times to re-test.

Also in the works going to built a heatsink for the quadspark...cause spark will be my next step...and finish with Fuel and then start the engine, tune for Idle....so on...