Seicento Monster Cento/ECU Master Thread

[Lecook]

Yea I heard that one too but I was thinking of the use of the spi ecu on the mpi head with the piggyback to give you more freedom over mapping if that makes sense??

Sorry for hijacking your thread honeymonster

 

[centoproject]

I think its possible but worth it for a n/a engine its got alot of tricks up its sleve tho

 

[Honeymonster]

See my answer on your thread here Lee so I don't have to type it out again:

https://www.fiatforum.com/cinquecento-seicento/301103-highly-tuning-1242-8v-2.html?p=3026404

 

[Lecook]

Really appreciate that buddy

 

[Honeymonster]

Not a huge update as I'm still waiting for the new suspension and a bearing to fit in the replacement hub, it has been powder coated ready though. Also been very busy at work.

Header tank arrived from Eurocare the day after I ordered it though. :worship:

Haven't lost a drop of water since I've fitted the tank and its been scorchio the last few days.

Also fitted my GT calipers and the brakes work rather well now.

 

[Honeymonster]

Got a bit done today/this morning. Had to use a huge four poster which absolutely dwarfed the little Sei lol.




Pictures are rubbish I was busy working and only had my oily phone.

Replacement shocks, bump stops and sleeves fitted all round, new anti roll bar bushes, replaced the bent hub with the freshly powder coated item after fitting yet another new bearing.





Fitted wideband and EGT gauges just need to wire them up.



So next step is ECU wiring, with a bit of luck I might be able to do it tomorrow, or should I say today.

Then fuel pump, mount the intercooler, oil cooler and a few other minor bits and pieces before I drop the motor in.

Edit: Will also need to do the tracking now as its gone out since removing the anti roll bar brackets so I will fit and adjust the camber bolts at the same time.

 

[jMz]

This is just.... special.
I wish I had the know how.
Oh and money....

 

[blu73]

well your in the right place to learn.. you'll have to find the money yourself though haha

 

[Honeymonster]

Haven't got as much as I'd of liked to today. Still waiting for some screened cable to arrive for the crank sensor wiring and have had a relentless banging headache, however I did get the other cables in.
Really easy with my diagram since FIAT have been kind enough to number all the connections under the ecu connector cover. There is also a nice little diagram for the conections on the DET ECU. Was ready to boot up and check the sensors when I realised I'd brought along the laptop but forgotten the USB cable for the ecu. :bang:

Anyway I'll let the pictures do the talking. All the cables just piggy back on to the existing cables bar the crank sensor items which I'll do in detail since they have to be screened. Need to be insulated well after the soldered conection has been made. Ideally with shrink but if you're lazy like me you won't cut the original cable, just solder on to it so you'll have to use 2 layers of quality insulating tape on each join. Nice grommet behind the wiper motor is perfect for a 12 core trailer cable that saves making a loom. Just need to punch a hole through the sound deadening. I removed the wiper motor to make life easier. Be sure to use a proper non-insulated crimping tool for the DET 3 connector.

 

[ycming]

That is really to install indeed!!!!!!!!

Basically you jusy T the wires into the big plug to the ecu ?

Thanks for the pic .

Ming

 

[Honeymonster]

There's still a cable to go to the MAP, the boost solenoid and the crank sensor wiring, but yeah it's not rocket science for sure.

With a boosted aplication there's still the diode on the FCD but I will expalin that later.

 

[BlueDan]

It's 1am, got in the car to drive home. Ahhhh my eyes!! Good grief it's bright, looks like a christmas tree through the hubble telescope.

::

Only just stumbled on this thread

 

[Honeymonster]

Just thought I'd update the crank sensor wiring diagram to make it a bit clearer. I will do the same for the MAP sensor and the FCD/diode wiring in a bit.

 

[Cento Painter]

Great work, this will be one to keep an eye on !!

 

[Honeymonster]

Map sensor wiring variations:



Without looking at the diagram in the book I would have probably connected the resistor in series with the diode to ground. This in theory would prevent any signal attenuation under normal conditions, however this is how ECU Master have done it according to the diagram below so who am I to argue. If it aint broke, don't fix it I guess. Some people don't use a resistor at all...



Also their wiring diagram for the boost solenoid is very self explanatory so no need to do it again:



I'm using a 3 factory 3 way boost solenoid off a modern vauxhall.

 

[blu73]

excellent info starting to appear on this page, keep up the good work fella

 

[Jube]

Hi Honeymonster.

First off, thanks for such an excellent thread with some very useful information and wiring diagrams.

I'm seriously considering an ECU Master for my Seicento 1.2 8v MPI track car.

My question is once the ECU Master is installed is it capable of working out a basemap for the car, so that it can then be taken to a rolling road for fine tuning?

If not, how do you go about setting the correct fuelling and ignition ECU file values via the ECU Master to suit your specific engine's requirements please?

Many thanks in advance.

 

[Honeymonster]

Hi Jube

If you run the DET3 in FIT mode it has a Volumetric efficiency table just like most other stand alone ECU's so you'll be in the ball park if you set it up correctly. It doesn't have any pre loaded base maps or autotune features though. What you would need to do here is start with rich tables and lean off a sensible amount monitoring your changes on a wideband. The timing will just be that of the standard ECU until you alter it. This should be plenty close enough to get it running before making further adjustments. There is also the option of running it in DET 3 NON FIT then adjusting the original ECU map.

I will be covering this in detail when I get to it so best to hang on a few more weeks when I will explain it in detail with pictures while actually doing it.

 

[Jube]

Hi Jube

If you run the DET3 in FIT mode it has a Volumetric efficiency table just like most other stand alone ECU's so you'll be in the ball park if you set it up correctly. It doesn't have any pre loaded base maps or autotune features though. What you would need to do here is start with rich tables and lean off a sensible amount monitoring your changes on a wideband. The timing will just be that of the standard ECU until you alter it. This should be plenty close enough to get it running before making further adjustments. There is also the option of running it in DET 3 NON FIT then adjusting the original ECU map.

I will be covering this in detail when I get to it so best to hang on a few more weeks when I will explain it in detail with pictures while actually doing it.

Thanks Honeymonster, that's great.

I'm looking forward to reading your experiences on the DET 3 mapping side of things in a few weeks time.

 

[Honeymonster]

Looking to calibrate the IAT and CLT sensors tomorrow/today. There's a bit of math and tinkering involved to work out the RX values. Luckily I'll be doing this so people with same ECU won't have to.

As for actually calibrating the temperature graphs after the RX value is inputed, luckilly I've just found some rather excellent information which will make this very easy:

View attachment Water Temp Sensor.pdf

View attachment Air temp sensor.pdf

Crazy to find out the same sensors are used on Ducati's, touring cars and all sorts of other high performance machines. Very simple coding really ATS05: Air temp sensor 05 casing, WTS05 water temp sensor 05 casing.

As for the MAP Sensor I will have to put it under pressure with a pump or compressor equal to my maximum desired boost to calibrate it, then the lower value will be done with a vaccum pump or more likely recording figures running it with the standard engine.

And finally the TPS sensor which will be very strait forward, but I'll explain these things when we get to them.

My screened cable hasn't turned up. :bang:
I will see what I can dig out of my spares boxes, I'm determined to get it done tomorrow regardless and not let it hold me up. Tomorrow night/Sunday morning I expect to have adjustable timing on the standard engine and calibrated sensors, I intend to see if I can at least get a small power gain for my drive home it too. :devil:

Bed time long day tomorrow. :wave: