Fitting a Standalone ECU

[rik1083]

I've been building up to this project for quite some time and have got pretty much all the parts, so I made a start..

new hole in manifold for the megasquirt IA temp sensor. You can use the standard temp sensors but have to calibrate them which I didn't fancy doing really, so I got the proven megasquirt sensors. Drilled and tapped to to 3/8" NPT (quite a weird thread but picked up a tap easily enough)

Same for coolant temp sensor (picked up a spare thermostat housing)

Manifold, charger, ecu, loom and charge cooler piping all removed (going to replace the nasty clear pipes at the same time)

this is what you're left with.. only 22 pins, of which i think I only need to reuse 14. The rest will be connected straight into the ms

relocated relays & fuses.. I hate having these in the boot so finally moved them

 

[blue se2]

Re: Fitting the megasquirt ecu

nice work keep them coming

 

[exmantaa]

Re: Fitting the megasquirt ecu

Nice!!
What sensor types are used by the MS? (I would have opted for the standard LSJ's Bosch TMAP, as that is all what you need there)
And what makes it that the Z22SE ecu SC-remap is no more sufficient for you?

Did look at a different ECU myself too. The Z20LET ecu could be an option, has E-TB and is a bit more tunable. Also looked to the Saab Trionic T7. That is now almost opens source and some good DIY programming available on the web. But too much of a project and the courtenay remap still runs ok for now.

Interesting to see what will come out of this.

 

[rik1083]

Re: Fitting the megasquirt ecu

What sensor types are used by the MS? (I would have opted for the standard LSJ's Bosch TMAP, as that is all what you need there)

they are some old GM ones..
the map sensor is built into the megasquirt so you just run a pipe from the top of the manifold to wherever you have the ms

Nice!!
And what makes it that the Z22SE ecu SC-remap is no more sufficient for you?

The main reason is I want to learn how it all works

but also.. when I add the ported saab head, pistons, and smaller pulley all in different stages, I don't want to have to go to courtenays and back each time

Think of it as moving out of your parent's house.. nothing to stop you doing what you want to do when you want to do it

 

[exmantaa]

Re: Fitting the megasquirt ecu


Same here. A remap-trip from Holland to Courtenay (or Hitec) complicates things a bit, so I just run the generic map now. But it now seems that a Dutch guy cracked our ECU a bit more open, so that can make things more interesting for DIY mapping. (Clever stuff => Self learning in closed loop mode and for open loop you can specify the needed AFR's.
(I still have a complete 2.0LSJ engine waiting in the garage. A good head job with some cams should make this an interresting revvy supercharged engine for my VX, as the rods and pistons are good for some 300Hp's.)

 

[rik1083]

Re: Fitting the megasquirt ecu

weber/alpha trigger wheel
Notice the TDC marker at 11 o'clock, the red tooth at 6 o'clock (aligns with sensor), and the missing tooth at 9 o'clock.
I believe this means, and please correct me if i'm wrong, that the missing tooth happens 90 degrees in advance of TDC. I think MS will need this info at some point but not looked into it yet

 

[rik1083]

Re: Fitting the megasquirt ecu

http://www.megamanual.com/ms2/wheel.htm

I think..
trigger wheel teeth (m) = 36
missing teeth = 1
skip teeth = 18
delay teeth = 8

does that sound right?

 

[rik1083]

Re: Fitting the megasquirt ecu

I will have to give the standard sensors go at a later point when it's all running.
The MS sensors:

 

[rik1083]

Re: Fitting the megasquirt ecu

Tidied up my chargecooler piping no end.

EGR finally good for something

 

[rik1083]

Re: Fitting the megasquirt ecu

started on the wiring. Temp sensors, grounding points, +12v for the ms are the easy ones..

the coil pack is a bit fiddle. Throw away the ecu that's mounted on top (as seen with the weber alpha conversion)
There's actually a connector in here that you can use..

just pull it out with a screw driver

secured the wires in with hot glue (can be undone if needed). And i'll probably seal the edges of the connector with silicone when it's running so no water gets in, and then make a ally cover to make it look nice

 

[rik1083]

Re: Fitting the megasquirt ecu

serial connection working, and temp sensors showing real temperatures!

oh and here's the actual ecu

 

[rik1083]

Re: Fitting the megasquirt ecu

injectors firing in test mode (spark too but can't take a photo of that)

 

[rik1083]

Re: Fitting the megasquirt ecu

starts and idles like a pussy cat
but anything over 1200 rpm it starts to growl like a dog
time for a tidy up then start tuning it

 

[sdbutler10]

Re: Fitting the megasquirt ecu

wow that is some amazing progress you have done there.
ncie work and a nice bit of kit.
now we need videos

 

[rik1083]

Re: Fitting the megasquirt ecu

The box of tricks that controls the throttle. Software on the chip still being tweaked, and proper PCB being developed.

 

[edbutler]

Re: Fitting the megasquirt ecu

Now im not that bad with a soldering iron, but this stuff is hardcore!! Well done mate

 

[rik1083]

Re: Fitting the megasquirt ecu

frustrating weekend trying to find why the engine was running lumpy above idle ( was worried I'd damaged the engine somehow). After messing with all the timing gear and even putting the standard ecu back on to see if it gave me any fault codes, turns out one of the injector pins had come out where it connects to the injector.
Put it all back together and running great. I've not taken it for a ride yet, but I'll be putting the clam back on and tidying things up over next few days.
Luckily ms has an autotune feature if you have a wideband sensor, so it should be able to get a nice steady map on it after a bit of driving in circles.

 

[Matt]

Re: Fitting the megasquirt ecu

Fantastic work there Rich

 

[Mark Dj]

Re: Fitting the megasquirt ecu

Some people on here are far to clever lol. Well done

 

[vocky]

Re: Fitting the megasquirt ecu

looking good