996.1 After market ECU - has anyone done it?

[kyepan]

I know remapping and reflashing is generally accepted as "the way" but has anyone on here managed to successfully wire a fully programmable aftermarket ecu into the engine and sensor loom. Think Omex, DTA, canems... Megasquirt....

I had a good look over the wiring diagram for the DME Motronic 5.2 & 7.2. First question: When was the change over between the two?

They both look fairly straight forward, however the main question is interfacing with the instrumentation and making sure the dash doesn't light up like a christmas tree with faults and errors. Second question, is there a separate ECU that runs all of the instrumentation, fault codes etc?

Last question.... 996.2 has anyone successfully got an aftermarket ecu to speak to a CAN bus system, i know DTA can do it, but ... in reality, achieving that is a massive difference from it being possible.

Cheers
J

Edited by kyepan on Friday 4th May 10:29

[mikep240]

Syvecs would be your best bet. Know of several fitted to 996 Gt2s and a GT3. All features are retained, dash behaves itself, fuel gauge works etc etc.

In a different league to the ecus you have asked about above, though obviously not cheap. A friend was looking to go the same route, he was advised by Syvecs to visit Horsham Developments to check the CAN out for compatibility.

No affiliation to either company, have never dealt with the latter of the two either. Good luck with your quest.

[kyepan]

Thanks!

[nxi20]

I've had a Syvecs in my 996.2 GT3 for the last 5 years. Fantastic bit of kit with some really nifty features that various mapping wizards have enabled for me: it won't fire the injectors until it sees 2 bar oil pressure which eliminates that nasty top-end start-up clatter when the oil has drained out of the cam buckets; it won't rev over 4100rpm when stationary (helps pass the static noise test!), it goes into a safe limp mode if the water temp is too high & it won't rev over 4000 rpm if the water temp is too low. The ECU is configured to protect the engine far better than the factory one does.

Biggest plus is that it data logs continuously & you can select what channels are logged along with the frequency. This is very helpful if your mapper is miles away & you have a niggle about a particular behaviour. The Syvecs suite of programs allows you to watch what the engine is doing in real time & live map on the road if required. The flash to the ECU is so fast that it can be done on the move since the engine only cuts for a second or two.