EZ69 Solution? 964 Turbo Ignition Module
 

Just wondering if anyone has found a solution to the Ignition Control module? I have been looking for about 6 months now and no luck. We have made the cable before but this is a bit different. Also wonder what the differences in the MB would be as there is no real programming in them, they are physically identical.
96560270601

EZL Computer Mercedes 010 545 59 32 Used Tested Full 60 Day Warranty | eBay

You should try to see if Chris from TurboKraft knows and let us know the out come please, because i I was thinking the same thing. and trying post the same question on the turbo forum. and on Reenlist 965 turbo forum

I highly doubt an EZ-69 from an M-B would work - as even the EZs for 3.3 and 3.6 motors are not interchangeable - that's my understanding at least.

I think people have switched to standalone ignition (like MSD) when a new EZ wasn't feasible.

I'm glad I found a working spare EZ a couple years ago :-)

i have one here, i have to test on a customers car , i will get back to you

i have one here with the number96560270601.
i have to test it on a customers car , i will get back to you

awesome.. please keep us updated

3.3 vs 3.6 Works with a Little lost power

This would be interesting to see if they work. I have two spares for my 94 I picked up over the years. Porsche gets some crazy money for them rebuilt. Last I checked it was almost $3000 plus $900 core charge. If this works for under $100 that would be an amazing savings.

I have two units that were used by Andial for racing I believe they were used on the 3.3's based on the dates but have a different body with an opening for a chip. I have no idea what the chip did vs the stock units but when I referenced the part numbers online they came up as MB units without any MB markings.

let us know

I think alot of people would love to know, I really hope it works guys

Helio

I've been quietly lurking to pounce on one of these should it become available for the last oh odd
24 mos.
Everyone I've considered obtaining has been priced in the stratosphere !
Happened to remember to mention it to a close friend who has a shop and who has worked on a number of these cars and he said give him a minute and quickly called me back with a " is this
what your looking for "? Real smarty pants like !
Just so happen to have one sitting on the shelf, ... it's on the way to you !!! Haha can't beat that!
Bert

Hey Bert

So you have one.. or know of one, is that what you saying..:)

Hey Helios .. Yes its on the way , and not for sale , last item needed for my '91 turbo 3.8 RS look..
not for resale , I wouldn't hesitate to try a Merc unit though if pressed, Bert

Any up dates on this guys

If everyone that needs one could submit a parts request at their dealer that would be great. Porsche is starting to re-make old NLA parts and supplier parts after enough request have been submitted. I currently have 2 of these cars sitting in our storage unit waiting on them

Well - IMO - ideally somebody would make a better solution - use the same wiring harness inputs and use an updated ignition computer. My understanding is the EZ has pretty relaxed/safe timing parameters - gains to be had using aftermarket ignition - but you have to tear things apart to install a trigger wheel on the crank etc. Would be nice to have a nice modern (adjustable/programmable?) plug n play ignition computer.

One can wish.....

Part of the reason the C2 Turbo with EZ69 has such conservative ignition numbers was the fact
the fly wheel had only three timing teeth.

The teeth where also not symmetrical (one is sized differently)....this lead to not good resolution.

If you get a chance to look at the crank sensor output you can see it wander.

I used a 62-2 wheel on my front pulley and a XDI-2 when my second EZ-69 died.

Bumping this thread as my 3.6 turbo is now inop pending location of a replacement (working at almost 30 years old) EZ69.

Come on Porsche Classic. You're letting these cars become relics when you want to help keep them on the road, making your brand look as amazing as it used to be. You can also make a profit getting us some replacement units.

Folks if I were you guys I would solicit Classic Retrofit. Those guys may have or come up with a solution to help you guys out. They made need a unit for testing. They’re based in the UK.

I asked my brother about this. He built a special turbo for me that I wanted to keep emissions legal and continue to use the EZ69. He still writes technical articles for his PCA region but is otherwise retired.

Here is his response. If you have an EZ69 equipped turbo you will gain an understanding on why no one works on these units.
--------------------------------------------------

My expert electrical repair shops can NOT repair them.... as Bosch bakes the circuit board assy. in epoxy. I tried my luck at chipping the epoxy away to get to the circuit board. Impossible. Messy, and everything breaks when the epoxy shatters.

According to Lonnie Lendezi at PermaTune he also casts his electronics in epoxy to prevent electrical leaks. Something he learned in the Air Force making high altitude fuel quality units.
The only fix is a replacement but they are N.L.A.

----------------------------
If your shop can't get your 930 functioning and it's parked.... you need a better resource. You are welcome to contact me privately and I'll give you a resource that should help you get your beast up and running.

Read post #90 here; https://rennlist.com/forums/964-turbo-forum/1346195-wanted-ez69-6.html

Back in 2021, we did a small simple conversion that removed the Ignition module and replaced it with another unit that was programmable. There was some simple wiring to be done to convert. Nothing that a DIY would struggle with.

If anyone is interested I can supply more into. I do need to refresh my memory of exactly what was required but I still have the wiring diagram of the conversion. Costs may have risen since then.

A potential basic solution like this;

http://forums.pelicanparts.com/uploa...1686502177.jpg

I have some EZ units with programmable chipsets in them from Brumos marked car #58. These go back to the racing of the 3.3L AFAIK do you have any info on them?

Know absolutely nothing about the EZ units. Never had anything to do with them. Our involvement was for a customer in New Zealand who had a car sit for over 1 year without a working unit.

We looked into what was required and what this unit needed for inputs etc. We integrated a small ECU and used only the ignition side. There was some simple wiring to do, changing over plugs sort of thing. All of the stock parts (except EZ) were retained and used in the solution. Simple and effective solution for a part that was NLA.

The Mercedes Benz, VW, & the Porsche 965 used the basic same design to calculate the engine's RPM,
i.e. measuring the start/stop time between the leading & trailing edges of the flywheel lobes.
The Porsche 964 & the 911 3.2 used a flywheel ring gear with a missing tooth to calculate engine RPM.

Knowing the ignition coil's primary inductance, the battery voltage, & RPM, the coil's current can be controlled
such that the coil driver semiconductor is not over-heated. The EZ modules likely didn't use this approach
and just switched the coil current on and off at the spark time. This resulted in the need for a very good heat sink,
e.g. the vehicle's body.

http://forums.pelicanparts.com/uploa...1686584145.jpg

Hi Folks,

I tripped over this thread while researching a project we are doing for Dkubus.

Long story short, I'm part way through development of a tunable EZL for 90's Mercedes that use what seems to be an identical Bosch module design to the 965 setup.

Basically, we are putting modern electronics in a custom case as a plug and play solution.
The concept is to have a unit that looks OEM and is an economical replacement for these failing units :)

Shall I start a thread ?

Steve thanks for including us either start a new thread or continue here as you were or even link the two might be better .
A lot of folks are looking for a plug and play alternative with digital electronics so that we might have
an option to these archaic design units .
Thanks for your help and contribution in advance , Bert

Ok,
I shall report back soon.

OK folks,

there are some minor differences between the Mercedes EZL and your 965 EZ69
I'm adjusting the next batch of prototypes to include those quirks

So will there be variations for the 3.3T EZ69 and the 3.6T EZ69. There are differences. Maybe one unit with two maps option?

Yes,

Variants with specific tunes/maps is the intended outcome.
Though getting one of each to replicate the factory map is going to be a quest.
Especially as you all seem to be hoarding the remaining spares.

Beta-3 board design was sent off to manufacture this evening.

Ok folks,

We are seriously way down the rabbit hole on this one, and I've hit a possible snag.

The EZL/EZ69 is relatively simple in 4-pin form, so not much differs electronically between Mercedes and Porsche applications.

Where we might come way unstuck is the Porsche specific harness connectors are both bigger than the Mercedes one and sadly clocked at a much lower angle.

As a direct plug and play fit is essential for this to work for the Porsche application, does anyone have a loose connector that can be photographed from the pin side?

Angle of the key and pins is what I'm looking to confirm.

The Mercedes plugs are keyed 90 degrees to the wire.


http://forums.pelicanparts.com/uploa...1695126902.jpg

the Porsche ones could be anywhere between 30 and 45 degrees on the images I've been able to find so far.


http://forums.pelicanparts.com/uploa...1695127137.jpg
http://forums.pelicanparts.com/uploa...1695127169.jpg

Steve if I can get in my storage and get a pic next 24 hrs will do so and post , thanks Bert

Thanks :)

We are hoping to clear an expansion connector that allows some cool stuff.

http://forums.pelicanparts.com/uploa...1695245858.jpg
http://forums.pelicanparts.com/uploa...1695245893.jpg

Spectacular, thankyou :)

OK, looks like we have enough clearance :)

http://forums.pelicanparts.com/uploa...1695255475.JPG

back to developing the thing I shall now go.

I admire the commitment. It takes balls to develop new product. Costs, demand and solution are all incorporated in this.

We took the more basic approach. Looked at the technical requirement and adapted a std small ECU to the problem. At the time there was no other solution. It did require some simple wiring changes, but it did work and included some other functions.

Not sure what of these were used but I do know of one example where the Ignition maps trims were used along with the boost control feature.

Like many aftermarket ECU's, we were able to supply a solution that solved the module issues along with Ignition map trims based on Eng and Intake air temps, a dual map function where different fuels can be used, a trigger scope, Boost and knock control, logging, lambda control etc.

This solution is for those that would want more than just a simple ignition control. Other solutions may have these extra functions as well.

The more choices out there the better for all.

I picked up these units years ago when ANDIAL shut down. I sold one of the units To Maverick over on rennlist. The two are marked EZ68 and have the number 58 on them. I am assuming these were used on the Brumos #58 car at some time.

I have no idea what the chipsets are and how to read them but if the remaining unit I have will help the cause I am happy to lend it. I do recall the unit I have did not work as well as the second in his 3.3T so it might not be anything that can help.

Neil

Do you recall these and f they might be of help?

I believe adapters were needed to make the plugs work.

http://forums.pelicanparts.com/uploa...1695406745.jpg
http://forums.pelicanparts.com/uploa...1695406745.jpg
http://forums.pelicanparts.com/uploa...1695406745.jpg
http://forums.pelicanparts.com/uploa...1695406745.jpg

Part of the development we are doing involves running the stock units on the bench and documenting the ignition map against RPM-Temperature-Pressure/Vac and variations on the octane/region coding plugs. Essential to have reference tunes by part number.


Getting the maps from the multitude of Mercedes models (and now the 2 EZ69s) means we are contemplating building a companion mapping device which can be sent out. So hang on to your EZ68 for a little while and we will arrange to document it for you.