M50tu

[rickb794]

A "base map" is only good for a PNP bone stock setup.
You need to understand the settings so you get them set right for your install.
Using someone else's settings may cause damage and you don't know why things were set or where to look for the problems you will undoubtedly have.Your best base map is the default provided when you make a new project.

Are there settings you are having trouble with?

[Johnsonmjm]

Well I'm on a bone stock setup at the moment. I want to get the car running on megasquirt before I boost it. It'll make it 10 times easier

And basically everything. Spark a trigger and how spark b, and spark c trigger.

[grom_e30]

sorry not for a m50 engine, it may be a good idea to play about with the tune ect before you boost it. a tuning mistake will be a lot more forgiving on a n/a engine.

[Johnsonmjm]

That's what I'm doing. I'm getting the m50tu to run on megasquirt before I plan on boosting (I don't have all the parts together anyway)
But I'm wondering how the megasquirt knows when to fire spark b and c. I figured out the spark a degrees but I'm assuming due to the general settings it'll fire spark b and c 120 away from each other and 120 from spark a

[grom_e30]

Correct for a 6cylinder even fire engine it's knows that tdc for the cylinders is 120 from the next tdc. Set it to wasted spark: a fires 120 b fires 120 c fires 120 a fires 120 b fires 120 fires. That's a angine cycle 2 turns of the crank.

[Johnsonmjm]

Okay I understand that now.
I'm still getting the same problem of the lights staying on. When I connect the harness with the key off, everything is off like normal. But the moment I turn the key to the on position, everything stays on, the dash lights (they are dim but on), my wideband gauge (with e9 code for low voltage supply) and the megasquirt. My relay circuit was built by following goathumper's thread on bimmerforums.

I'll take pictures today and post them.

[grom_e30]

have you got a link to the thread?

[Johnsonmjm]

Here it is: http://www.bimmerforums.com/forum/showt ... lay-how-to

[grom_e30]

does it power up and down like it should if you plug in the adaptor ecu without the megasquirt connected to the adaptor

[Johnsonmjm]

I have not. I'll try that and let you know.

[Johnsonmjm]

I hooked up my adapter harness without the megasquirt hooked up and nothing powered down. Did the same thing so it must be in my main relay circuit.

[grom_e30]

Yeah this sounds like the case are you sure you got the transistor pinout correct?

[robd]

I've got a M52B28 base map you can have that may help. I'm not sure if the trigger angle is different on the M50tu though and possibly the 'Ignition Input Capture' setting?

I changed the settings for my car, my trigger angle is 324.5* and Falling Edge. My car is a '96 E39 M52B28 Turbo using the oem Hall Sensor.

Instead of building the extra circuit I run a parallel install so the stock ecu is still in place and shares inputs, it just doesn't control fuel or spark or the fans etc. Everything still works on the dash like mpg etc. I am having some sync loss issues at the moment though!! lol

[Johnsonmjm]

I double checked the pinout and they are correct.
I have all my extra circuits running off of pin 56 so I may be getting feedback problems from the other circuits so I'll change it to run off the dme relay and try it today. I'll let you know how it goes.

[grom_e30]

so what is actually being powered off pin 56?

edit: whats the part no on the transistor?

[Johnsonmjm]

Pin 56 is going to the base of a 2n2222a transistor with a 4.7k resistor before it.

[Johnsonmjm]

And I believe my vanos and idle circuit (idle circuit isn't complete yet so I don't think that's it.

[grom_e30]

do any of the diodes connect back to pin 56?

[Johnsonmjm]

I do not. But from my understanding there shouldn't be.

[grom_e30]

is the vanos transistor circuit inside the ecu?