Conversation of a Digiplex 801A to 802A possible ?

Snoop and contact banned member 'Fastradio' IIRC.

He has done such things, and with new parts, but there is a Legal and an Ethics issue involved that he wont break.

If you need more info PM me.

 

Years ago I purchased a pair of 802A modules, left-over NOS from an EU supplier. I replaced my OEM 801A modules in my USA-spec car, and I can confirm that the swap is 100% plug-and-play. No other tweaking or modifications are required.

The end result is a notable performance boost for the car, due primarily to the advanced timing offered by the 802A. Do a forum search here, as this topic has been discussed frequently in the past.

Of course, my comments are directed only at the performance differences between them - one should always check local regulations before considering such a swap.

 

Paul,

I am an American living in Germany but my command of the language is horrendously bad.

IF you live in Germany it is OK for all that crap to come off, as I understand it.

As for now, the Germans dont give a crap about 'Pollution S***' present or missing on a 30+ year old car. Besides, how many are there?

They are just damn happy it is still on the road.

 

Dave,

Just an note.

Although the cams themselves are the same as I understand it, the valve timing is set differently.

The EURO Exhaust Cam's timing are different from the US cars by 4°

 

+1 -- http://www.fluentinferrari.com/products/

 

When did David move to FL?

 

I live near Weiden.

How about you?


Sorry but I really know nothing much about these 'boxes' at all.

Especially the internals.

 

I had the same reaction (as I searched on "Ferrari Service of Bedford" to get his website link, but it came up "Sarasota Italian Garage") -- if you read his "about" page, it says he recently relocated from NH to FLA.

 

Who is Digiplex Adrian?

I am down around Karlsruhe from time to time. How close are you?

 

Might be more accurate to call him "Dinoplex Adrian" (but he may do Digiplex things as well).

Adrian's FChatter user name is alhbln -- his website:

http://www.dinoplex.org

If you do a search on "Dinoplex", he almost always gives very useful technical responses to every Dinoplex-related thread.

 

Unfortunately you can't convert a 801A to a 802A as the advance curve (the main difference between the 801A US and 802A EU mode) is stored in the RCA 1800 MCU.

Paul, 89711 is the type number, search for RCA1800 to find the family description. You can dump the EPROM with some tricks but then again you would not be able to get OEM replacements based on this chip as it has been out of production for decades and was only available to Marelli in this pin out configuration.

The circuit could be reengineered for another MCU but then again, building a more robust and easy to repair replacement board would be less work. I have developed a replacement board some years ago, but as there were several companies working on such a replacement i did not see the need to continue. So if there is some supplier offering a conversion to a modern replacement board then that would be your best option. Ideally you can even reprogram the curve on a rolling road to adapt the advance curve to your engine and your nees.

 

Paul, Adrian,

David can/will convert 801As to 802As for people in countries that had 802As as OEM.

I believe he replaces MOST/ALL(?) the internals for new, as his cost is somewhat expensive to the pure know-nothing layman of such things, like myself.

At one time and maybe still, he would NOT make the conversion for US cars unless they were owned/driven OUTSIDE the USA, as he thought he could possibly run afowl of some US Govt Agency. That was a few years ago.

What his policy on making the change is now, I don't know.

Id certainly email him and ask if interested.

Besides, Greenpeace won't 'come after you' for killing a few electrons ... at least not yet.

 

Paul,

I think Adrian meant '... Not Convert ...' as to meaning via a simple one or two €0.50 cent part swap.

Thru his Tach and Speedo projects/products he has apply demonstrated almost anything in the electronics world can be done, but often requires a COMPLETE redesign and rebuild with many new parts, as old OEM parts are often NLA and 'Plug-n-Play' part-swapping hadn't been invented yet.

I seriously doubt he was trying to be a 'Show-Stopper.'

 

What i meant was that you cannot convert an US to an EU Digiplex (as example by modding it), but you could rebuild the unit with new electronics. If there is a supplier who can do this then this is the way to go.

The electronics in the Digiplex 80x are not very complex and can easily be build using nowadays components, the timing requirements are also not that complicated. It just takes some time to design, built and especially test it. I already designed and build the hardware some years ago (see below) but did not start on the software as there were two companies already working on this, so there should be some alternatives available


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My guess would be that it's some sort of LVDT sensor -- has anyone taken one apart?

 

I would love to get rid of the idle curve built into the US electronic unit. I thought I remember that the retarded curve made the car idle hotter.

Does the US spec car benefit from more advance that this engineered unit could provide? Has anyone here to played with the timing curves?


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The US timing curve and retarded cam timing is to help with catalytic converter efficiency. Hotter exhaust at idle and faster cat lite off. Not a plus for performance. A US car would benefit (performance wise) from the timing advance at the expense of emissions.