4 ECU coil drivers or EDIS8

[eliot]

EDIS8 info for those that want to know more:
http://www.megamanual.com/ms2/EDIS.htm

Quite easy to score in the UK too.

[trackcar]

Clear as mud then thanks

[BB-Q]

I used an EDIS 4 coilpack from a Mondeo on my 940 with MSnS v3.0. I didn't bother using the EDIS module though, rather firing the coils direct from the ECU. The v3.0 is supposed to be very robust.

The coilpacks are readily available too. I pay £5 a time for them.

[BB-Q]

Steve_D said:

spend said:

GreenV8S said:

trackcar said:

I don't know anything about EDIS .. what is it exactly? a combined amplifier and spark-advancer in one unit? does it have any other inputs except engine speed? how can you get a 3d map from it? don't understand how it functions if it doesn't need an ECU signal ...

Not used it myself, but from what I understand it's basically the same as a dizzy but taking the engine position off a toothed wheel signal, and with the mech/vac advance controls replaced by a simple digital signal from the ECU. I assume that in the absence of the digital signal you just get the default timing.

Not clear how V8 EDIS would work, I guess you would have two toothed wheel sensors 90 degrees apart driving two separate EDIS-4 units.

I think there is an EDIS-8 unit, but not very common to find V8 fords over here The unit links to 2 separate 2 coil (wasted spark) coil packs.

As I understand it you can send a SAW signal to tweak advance / retard - if this is missing it is capable of operating 'limp home' as a stand alone unit just fed from the crank sensor. The ecu is fed the CPS signal from the EDIS controller (PIP IIRC), but as I understood it with no timing info - just rpm?.

Dave

The EDIS8 unit takes the signal from a single VR sensor which is looking for the missing tooth. You position the sensor to give 10 degree advance.
The EDIS sends this signal PIP (Profile Ignition Pick-up)to your ECU which then modifies its timing and sends it back SAW (Spark Angle Word) and the EDIS uses that to decide when to fire and which coils of the two coil packs it connects to. If it gets nothing back it will use the PIP as limp-home at a set 10 degree.

Steve

The thing that everyone forgets, though, is that EDIS systems won't allow limp home on failure of the crank sensor, just on failure of the ECU to provide a modified signal to adjust it's timing from the standard 10 degrees. I personally don't see this feature as particularly desirable considering the added wiring involved and the likelyhood of the ECU failing in that way, but each to his own.


Edited due to severe blonde moment

Edited by BB-Q on Thursday 29th November 23:08

[spyder dryver]

Hi Iain! I am currently running Megasquirt V3 with four output drivers firing four NIPPONDENSO coil on plug units from a Kawasaki ZX9 superbike. All this on a four cylinder Toyota 3SGE 2 litre in a kit car. Runs from the original CAMSHAFT position sensor. Easy to install and came with a base map already loaded.
It has been 100% reliable. It is ,of course, fully mappable and has many other facilities that EDIS cannot offer, such as Rev Limiter, Knock Sensor, Lambda Sensor and Shift light.
It may not mean anything but when setting the basic advance using a Snap On digital timing light the timing marks were the steadiest I have ever seen, much steadier than when using the previous ignition set up.
Would the inbuilt advance curve of an EDIS unit suit your engine? I guess it shouldn't be too far out.
Geoff.

[Mattt]

Geoff, have you heat wrapped your exhaust manifold in tin foil?

[spyder dryver]

Mattt said:

Geoff, have you heat wrapped your exhaust manifold in tin foil?

Hi Mattt, the exhaust has graphite cloth ( looks like thick grey felt)wrapped round it with foil on top of that. I am so fed up of the abuse this generates that I have just bought some proprietary exhaust wrap. It wont be as effective as the graphite stuff though!
So no more jokes about grilling sausages, baked potatoes etc. everybody!!!

Geoff

[eliot]

spyder dryver said:

It is ,of course, fully mappable and has many other facilities that EDIS cannot offer, such as Rev Limiter, Knock Sensor, Lambda Sensor and Shift light.

Would the inbuilt advance curve of an EDIS unit suit your engine? I guess it shouldn't be too far out.

Hi Geoff,
Glad yours is working well, Just like to clear up a few points:

EDIS doesn't support spark-cut rev-limiting, but you can still rev-limit by retarding the ignition. I have a Soft limit set at 5500 to retard to 10' which is enough to hold mine, I also have a hard fuel cut at 5700 if the soft doesn't hold it.

Knock Sensor, Lambda and shift lights are all features of megasquirt and are supported regardless of ignition type. Perhaps you are confusing it mith megajolt, which is a simply EDIS ignition only setup.

There is no "inbuilt advance curve" inside EDIS, spark advance word (SAW) is commanded from your ECU. When nothing is commanded, it defaults to 10 degrees - limp home mode. (And hence why you cant have spark cut, as you cant tell edis to NOT fire the plugs)

Regards,
Eliot.

Edited by eliot on Wednesday 5th December 11:40

[Chassis 33]

eliot said:

spyder dryver said:

It is ,of course, fully mappable and has many other facilities that EDIS cannot offer, such as Rev Limiter, Knock Sensor, Lambda Sensor and Shift light.

Would the inbuilt advance curve of an EDIS unit suit your engine? I guess it shouldn't be too far out.

Hi Iain,
Glad yours is working well, Just like to clear up a few points

Just to clear it up (), that's spyder dryver you're quoting, not me!
Regards
Iain

[IRG]

EDIS units are notoriously reliable ………………… on the plus side they are also waterproof and an RV8 running EDIS can be safely submerged ……………especially if using Ford Gen1 coil packs that have sealed outputs………….


Having said that…………… MS1 running a V3 board with the extra drivers is also reliable once the initial setting up bugs have been ironed out………..

Both are good options for dizzyless ignition…………. I guess it boils down to the fact that EDIS is easy to set up than MS1 direct driven coils………….


Ian