Seicento Monster Cento/ECU Master Thread

[Honeymonster]

Honey I'm home

All set up and functioning. :slayer:

There is a small mistake in my crank sensor wiring diagram. You only need to connect the red to the DET and the outer sleeving to earth. The outer sleeving is already earthed at the ECU end so it's easier just to intercept the red here and run it back to the DET 3 (screened cable with the screen earthed at one end). DO NOT connect the white wire from the crank sensor at all (I will update the diagram later). The DET is generating white half by itself and this is how it modifies the signal. If you connect the white to ground you will get a misfire and the rpm won't sync (trust me....).

I did the calculation for the temp sensors and ended up with 2027 for the RX on both.

Example: RX=10000x(4.895-4.070)/4.070= 2027

They are the same sensors in different casings. Then to add insult to injury it turns out ATS04 is selectable as a predefined sensor. So just select ASO4 in the menu for IAT and CLT and click generate and it's all done for you. Both the RX and temperature values!!

At least I double checked I guess. Couldn't do the MAP sensor because I forgot to take the Cosy 3 bar one with me and it wasn't worth doing the FCD/diode wiring without this. (hence I'm home a bit early). :bang:

However upped the timing 2 degrees throughout the rev range for the drive home, didn't notice much difference to be honest but at least I know it all works perfectly.

The car drives like the DET isn't even connected and the the DET is generating the advanced timing signals!! :slayer:

TPS set up was stupidly easy, just set the top value untill you get 0% with foot off and the second value until you get a 100% with foot on.

Showed the system to my friend who tunes rally cars (and owns the garage) and he was suitably impressed (he normally hates piggy backs, don't most...).

More good news I now should have full use of the load bearing rolling road at the local college for about £50 a day, and the help of my friend (Matt the tuner) so we'll really get to see how accurate the DET RR is and I'll end up with an excellent proffesional tune. More on this later...

I used VR adaptive and 60-2 for the timing menu but I will post screen shots of all my settings when I get a bit more time.

I am a seriously happy chappy.

I've posted a few random photos below, they aren't the best I was rather busy. I used individual sreened audio cable for the crank signal wires in the end, it's all I had but works great.

It started first time, and reved and synced fine after I cuth the white wire I shouldn't have grounded.

More to follow, with a bit of luck I will get the 3 bar sensor fitted this afternoon. :slayer::slayer::slayer:

 

[Honeymonster]

New crank sensor diagram and sensor set ups. I will add TPS and MAP later.

 

[centoproject]

looks like im defo going det 3 before they bump the price up lol and good on you pal

 

[blu73]

my like button isn't working but I LIKE!

 

[ycming]

am impressed how quickly you got this thing working!!! I can only see a growing trend .

Ming

 

[woj]

Sorry to mess up your thread with this, but: am I stupid, or is the thanks button not available anymore?

 

[centoproject]

i belive you are correct

 

[BlueDan]

Yep, same here, just like and dislike now.

 

[blu73]

Sorry to mess up your thread with this, but: am I stupid, or is the thanks button not available anymore?

I've had temperamental 'like' & 'dislike' buttons for longer than i can remember..

 

[Scott6466]

Looking very nice!

 

[Honeymonster]

Hi guys thanks for your kind comments they are very much appretiated.

I have fitted the second Map sensor and FCD circuit now, everything seems to be working great.

A slight modification is required to my original FCD diagram as shown below. When I used the earth on the sensor plug for the Zener it upset the ECU and caused a misfire. You must earth the Zener diode elsewhere, I used the ecu casing ground but any chassis ground should work fine.

Things are moving along nicely, the mapping screens seem very responsive and intuitive.

Cheers

Monster

 

[centoproject]

will you eavan need to take it to a RR for the final tune ?

 

[Honeymonster]

It's always best to do the primary tune on a load bearing RR if you can as all load conditions can be simulated consistantly and easily. Final tune is best done on the actual road.

Doing a full tune on a public road would also be very dificult on an Island with a 40mph speed limit.

 

[centoproject]

much easy near me i live in them thar hills and nice flat continuous moors

 

[Honeymonster]

OK, so I had a little time at work today while I was soak testing some machines. As I mentioned before I was far from convinced having the 10k resistor inline with the MAP signal cable on the FCD circuit wouldn't atentuate the signal under normal conditions with the map circuit being so wimpy.

So I built the circuit on my bench and tested it using a current limiting bench power supply and a multimeter...

Guess what, it attentuated the signal A LOT.

In fact I tried a range of lower value resistors and all of the made some impact, even though much less (as I expected). Since we have no easy way of increasing the refference voltage we'll have to go with a bit of brutal electronics (or suffer poor MAP calibration).

So below is the final version I suggest. That is a version using the tried and tested method of no resistor. I'm using a 1.3w 4.3v Zener so the small amount of current it has to bleed to earth won't cause it any damage or create excessive heat.

The moral of this story is, if in doubt.... test it.

This set up without a current limiting resistor would normaly be considered bad practice in electronics (watches electronics chaps shudder), but it's a proven working method. If you don't like it don't use it.

Also the problem of it completely removing fuel cut allowing overboost (which it would do on a car running a standard ECU) are not applicable since the DET has over boost safety/fuel cut control refferencing the second MAP sensor and has complete control of the fueling.

Last FCD diagram I promise... look on the bright side, it's even easier to connect up.

 

[Honeymonster]

No big update this weekend I'm afraid. I had to spend some time with Mrs. Honeymonster or I'd of ended up single. Did put the diff in the gearbox after giving it a degrease but only took one picture as its pretty straight forward.



Hope to get a lot done next weekend. Been driving the car everyday when I can, no issues at the moment all the new parts are working nicely.

 

[blu73]

i want one

 

[centoproject]

:yeahthat: we need dragonman style vlog updates lol

 

[blu73]

i was so gutted when i couldn't afford to get one when they did the original group buy. Your lucky to get one! Although pretty sure there is still a couple of spares floating about.

 

[Brooky]

RC has a few doesnt he?
I sold my spare yonks ago