Lorenfb

Might be time to talk to John at JDS: http://www.jdsporsche.com/

ramcram

What a great read!

AO

Good luck on your exams.

17prospective buyer

So, does that mean you'll have to pay yourself for your efforts seeing as you're not a member?

Sorry i just had to.

I wish i were smart enough to do this kind of stuff like you and other people here. True innovators like you make Rennlist.

Bill Ball

I'm just a bit more confused than usual about some of this. Is this a PC driven LH replacement; i.e., it requires a PC running full-time to operate the fuel injection in car? If not, I don't get why USB polling is an issue with the injectors. Why would USB communication be involved in a plug in LH replacement except for collecting data and adjusting maps and other parameters with a PC, like Sharktuner?

depami

It is stand-alone and requires no computer. The USB is for re-programming and perhaps diagnostics. However, the program within the LH that runs the injectors needs to "keep an eye open" to know when it is being re-programmed.

Volla

@17prospectivebuyer: Lol, yeah i am kind of paying myself because im doing it without charging for the labour hahaha, but yeah need to sort out credit card woes, and then ill do the whole rennlist member thing.

@Bill Ball & @depami: Yes this system is stand alone, it does not need a pc to operate, the pc and usb is there for diagnostic, real time information and remapping along with updating firmware.

The code needs to check if there is anything on the usb bus, and when there is stuff there is a lot of admin to do with keeping the usb alive and stuff. That is where the problem lies, everything works ok then you plug in the usb and the car floods and stalls (dies miserably).

You could use it and remap it while the engine is NOT running, but that would make it epically pointless and slow.

As it stands now on my bench test unit you can plug it in with usb and have real time rpm, maf, temp, co2, injector time etc. But this is not yet tested on a running car.

need to debug a bit of the mapping code but yes, mainly its sorted. needs more testing that will happen in august.

but first comes academic work! Happy motoring everyone!


==================================================
19?? VW Baja Bug (Completely custom, Golf 1.8 motor, and many, many mods) - Currently my daily drive
1988 Porsche 928 S4 Euro/ROW (Black with Ivory interior) - Under ECU surgery
1982 Porsche 924 Euro (Silver with cream interior)- Gone
1982 Porsche 928 S (Manual) Euro (Petrol Blue with Blue with black and white chequered interior) - Gone
1983 Porsche 928 S (Auto, NA spec, Red, black interior) - Gone
1994 BMW 530i Manual (Maroon, grey interior) - Gone

ramcram

[QUOTE=Volla;9623851]
As it stands now on my bench test unit you can plug it in with usb and have real time rpm, maf, temp, co2, injector time etc. But this is not yet tested on a running car.

need to debug a bit of the mapping code but yes, mainly its sorted. needs more testing that will happen in august.

but first comes academic work! Happy motoring everyone!


Would it be possible for your new setup to run with a 'Wideband' O2 sensor? Even if the LH unit only responded as th original one did, this would allow tuning and monitoring via a wideband AFR gauge without the need to fit 2 O2 sensors.
Love your work.

Dictys

I only have the WBO2 sensor fitted on my car and I take the NB signal from the WBO2 controller and use that to go straight to the LH. You will not need two O2 sensors either on the existing setup or Volla new version as long as the WBO2 sesnor controller has a NB output (most do).

17prospective buyer

Volla, why don't you just get a Vanilla Mastercard to pay for online stuff? That's how i payed for all the 928 parts i've bought online (is there any other way to buy 928 parts?).

ramcram

I got excited by your post, so I emailed AutoMeter, from whom I have a WB AFR kit ordered and asked if there O2 sensor included had NB simulation. I got this reply.

"Hello Mike,

Our wideband gauges do not have a simulated narrowband output. The wideband gauges will require a separate port to install the sender into the exhaust. The weld in fitting is included with the gauge.

We have considered offering a narrowband output; however the actual signal from a narrowband sensor has shown to work much better than a simulated signal. This also allows the vehicle to use the sensor it was designed for to avoid any potential problems with drivability. This is why we decided against offering this feature.


Thank you,
Kevin
Tech/Service

Auto Meter Products
413 W Elm St.
Sycamore IL 60178
1-866-248-6357"

Dictys

Mike, mine is a techedge WBO2 controller and I think all their offerings do a NB output, it works perfectly on my S4, and I suspect a lot of 928 owners who sharktune their cars.

I made up my own harness which connects to the existing O2 sensor plug and then powers the WBO2 controller and supplies the NB signal from the WBO2 controller back to the LH. John speake supplies a similar harness with his sharktuner kit.

Check their site http://www.techedge.com.au/

dprantl

TechEdge wbO2 narrowband simulation works fine in my car.

Dan
'91 928GT S/C 475hp/460lb.ft

ramcram

I've checked the Techedge site before, some great info. The kit I have comes with an LSU-4.2 Bosch O2 sensor which doesn't have NB simulation, as far as I can tell. I see PLX do some interesting converters to achieve this also.
Had a great 2 week in 'the land of sand' a while ago, staying with my step son when he was with Emirates airlines.

John Speake

Which model do you have ? All their kits have sim NBO2 that I've ever seen....