EZ69 Solution? 964 Turbo Ignition Module

[Cobalt]

Originally Posted by Bastin

I've got two spare units lying around for my '94, and Porsche charges an arm and a leg for rebuilt ones - like $3000 plus a $900 core charge. These would be a huge score if they work, If I can get functional ones for under $100, that's a massive savings. Fingers crossed

I as well however Porsche no longer sells the EZ69 units and when they sold the BX rebuilt units version which were problematic they were $7800 with a $5k core charge. That had to be 10 years ago. These are NLA from Porsche. Last I saw one sell for was over $5k on Ebay.

There are sites claiming to sell them however Porsche has no inventory and I suspect if you try to buy them they will tell you they can't get one.

[Bastin]

Will the 3.3T and 3.6T EZ69 come in different versions? Thought there were some key differences between the two. Maybe a single unit with multiple maps?

[heliolps2]

Any updates on the development on these units?

[Reanimotion]

Prototypes are currently undergoing durability testing, and although indications are we have a viable product from an engineering viewpoint, there is still much to do.

Next step for us is the pre-production evaluation phase, and concentrating on manufacturing viability. e.g. refining the upper case to eliminate several of the CNC machining steps required for the prototype phase.

The tiny potential market for this and the physical complexity and dimensional tolerances of the module have this silly project jammed well and truly in the "must be near perfect or don't even try" zone.

[heliolps2]

Originally Posted by Reanimotion

Prototypes are currently undergoing durability testing, and although indications are we have a viable product from an engineering viewpoint, there is still much to do.

Next step for us is the pre-production evaluation phase, and concentrating on manufacturing viability. e.g. refining the upper case to eliminate several of the CNC machining steps required for the prototype phase.

The tiny potential market for this and the physical complexity and dimensional tolerances of the module have this silly project jammed well and truly in the "must be near perfect or don't even try" zone.

Thank you kindly for the update Steve. I certainly will be suggesting to everybody I know plus on 965 owners reenlist to buy one and put there original unit away in storage. I feel your new unit is a must have for all 965 owners. I had one go bad on last year, Thank god I had spare. if not my 965 would be a paper big weight waiting to find another unit. Thank you again for all your work to develop these.

[Jay993]

I’ll take one as well! Much needed as my 94 turbo will die if you shift to neutral while coasting to a stop. The car then won’t start for some time

[assman]

Any update on this? I just bought a 964 3.3 Turbo project and although I don't know if I need one of these, I wouldn't mind having one for when I do.

[MelcoPorperties]

Anyone? Bueller..,..

[heliolps2]

Hi Steve,

I hope all is well. any updates?

[Reanimotion]

Hi All,

Nothing definitive to report yet.

Most of our time is being split between refinements for possible production and reverse engineering the ignition maps out of the 01 EZ69 and various Mercedes units.

[heliolps2]

Thank you for the update

[Jay993]

Thank you! We’re patiently waiting!

[Reanimotion]

UPDATE,

As part of the EZL/EZ69 development, we have unfortunately discovered a little issue the Mercedes EZL as a cheap option.

The fuel coding signal (mercedes) is on the same pin as the Porsche charge air temp sensor is on the 965.
And the resistances are inverted between the Mercedes coding and the Porsche sensor!

Therefore, as the intercooler heats up, ignition timing could advance by up to 6 degrees instead of retard by up to 2.8 degrees.

Not good if you are wanting to protect the motor.

The 538 and others are still likely a good candidates for a "Get me Home" emergency spare to keep in the toolkit, but really not a good choice for extended use.

[Reanimotion]

Reverse engineering the maps is showing promise, but we have some variables in the bench test setup that we must eliminate. Digital replication of the input signals is fine for development but we can't be confident of any results unless the correct real world inputs and outputs are connected.

Thus the above contraption is about to travel from it's home town to us here in Oz and be retrofitted to run a proper flywheel trigger setup and generate vacuum and boost pressure, while firing actual spark plugs etc. Essentially a desktop engine dyno.

The 01 EZ69 we have here is not yet confirmed as functioning properly and there is a chance it is unhappy with the dummy ignition coil load we are using on the bench or it has a faulty temp sensor input, either way it is 7-10 degrees retarded from where it should be when above 2500 rpm.
So, fingers crossed connecting a proper 965 ignition system might pull it out of safe mode and we can move forward.

Chances of our module having a preloaded factory map -- maybe 50/50 at best

Let the weird futility continue