928mac

So... I have a 89 shark that I want to make tuneable.

The problem is I don't know the products and versatility

Do I buy the Sharktuner found here

http://www.jdsporsche.com/sharktuner.html



.............OR...............



do I go with the



Engine Management System (EMS) kit from 928 Motersport found here

http://www.928motorsports.com/parts/...management.php



..............Or is there something better.............

AO

Unless you're going to do some really off the wall stuff, you really can't beat the SharkTuner. It has a fairly wide range of flexibility, knock retard, and a pretty good group of people that are knowledgable about it.

AO

And it's a whole lot cheaper to get into.

ALKada

FWIW, consider checking to see if someone in your area has the Sharktuner on hand. Buy the progammable prom (around $100.00) and see if they will tune it for you for a fee. Someone correct me if I'm wrong, but you will need access to a dyno to get WOT for part of the tuning phase. If you plan on constantly adding/changing components then consider buying it. Also, you will need a wide band O2 sensor to replace your stock O2 sensor(s).
I have an '89 also and have looked into doing this.

Ducman82

unless you have an OB and you have no choice but a whole system...

BC

The one thing keeping people from taking a standalone efi plunge is the task of wiring it all in. IMHO
Once past that mountain, the gains from good tuning, high processing speed, etc are great.

FLYVMO

bwmac: I installed a TEC3r system in my 1986.5 a few years ago. The wiring was not bad, it took a weekend to finish. It does use some non-Bosch sensors (MAP instead of MAF) but it can be overcome. The tuning capabilities are great on the unit, but if the Sharktuner had been around for my car at the time I would have gone that route instead. That way you already have access to factory fuel and ignition maps. If you go with a complete aftermarket system, you are doing everything from scratch, and the tuning to get the car back to "factory drivability" is very time consuming.

If you want features like "valet mode", anti-spin mode and launch control, then you need to look at an after market system. Another positive of the aftermarket system is that you are a getting a brand new engine harness (at least with the TEC3) so all wiring is fresh. It also has full time wideband O2 inputs to run optimized AFR's at any RPM/MAP point. My 86.5 dynoed at 271 rwhp (around 310-315 crank) with the TEC3r installed on just the initial base tuning. There are performance gains to be had with additional tuning.

But if you want something that you can easily return to stock, my recommendation would be to go with the Sharktuner.

Carl Lindberg
1986.5 928S 5-speed

jleidel

I would agree with that 100%. The SharkTuner is incredible, so don't interpret this as not accepting JDS. Its amazing how much it can do. However, given that you're ultimately limited by the fab technology available in the mid 80's [when the later model computer was really designed], its pretty antiquated.

Newer engine management benefit, not only, from the latest fab technology [eg, Moore's Law], but the latest in software technology [eg, embedded operating systems, open source RTOS foo, etc, etc]. I can buy a package off the shelf today for less than $200 and run a fully-fledged hard real-time operating system that can accept 2^32-1 interrupts per clock if they're multiplexed correctly... IE: i can feed an insane amount of sensor data to it.

That being said, I would go with a SharkTuner setup.... integration headaches be gone.

pasa

Colin installed a VEM'S system with Porsche Cayenne coil on plug units and I haven't looked back. My car runs so strong now - it feels like a different Porsche altogether. The best part of it all is that it looks totally stock!

Dan 1990 928GT

ptuomov

My experience so far has been that I am the limiting factor in getting the tune optimized, not LH, EZK, or ST2. I think people somewhat overestimate how much of the gains come from better ECU box and underestimate how much from really understanding tuning and doing the hard work optimizing the parameters even in the simplest ECU box.

Hilton

One of the local guys has tried out Adaptronic - a self-learning ECU (i.e. it modifies the maps based on inputs from sensors. Its not cheap, but his results were better than he could obtain with a sharktuner (he has his own dyno).

More on his build here: http://www.emtec.net.au/928GT_engine.html

Having said that, I do own a sharktuner II

Until I'm building a serious engine, the sharktuner will do me for getting max benefit out of the basic stuff I have to hand (S3 cams, X-pipe, intake mods etc.).

andy-gts

I have hear the Link system (xtreme) is pretty good for about 1\5 the price of motec and can use stock knock sensors.

Brett928S2

Hi All

Just to add a third dimension to this discussion...

The point of "TUNING" either with John`s Sharktuner or the Motec or any other aftermarket system is to attain more power from setting the car up correctly or setting it up better...for even more power...maybe even as much as 25 to possibly 50 hp maximum...

I hope we all agree with that last paragraph as almost nobody will agree with my next paragraph...

Why bother ?

All 928s run rich particularly at the top end, so do not bother tuning....just add Nitrous, ANY 928 will take at least 150 hp of Nitrous at the flick of a switch.... Nitrous likes engines that run rich as it adds a safety factor...

So although I do not expect anyone to agree with me, if its ultimate power you are looking for , more than "tuning" in any form can supply, then try Nitrous...150 hp for under $1000 (American) anyone ??

All the best Brett

928mac

Thanks andy I checked out the link
http://www.linkecu.com/products/engi...ecus/g4-xtreme
but I didn't want to have to design my own system and I think that this is for that kind of thing.

I like the idea of the 928MS kit because of all that they give you for that extra cash, new harness, plug wires, new ECMz but I haven't decided for sure yet. you guys present a good case.

Lizard928

The answer to this question IS based on your abilities and goals.