JDSPorsche

The JDSPorsche LH2.3 SharkTuner for the Porsche 928 (MY 1987 onwards) allows the optimisation of the fuel and ignition maps to ensure optimum performance from the engine. This is particularly important if the engine has been modified in any way e.g. change of exhaust system, supercharger.

The SharkTuner is a hardware interface between the LH ECU (fuel injection computer) or the EZK ECU (igntion computer) and a laptop computer. A custom Windows interface program runs on the laptop, and a slave microcontroller in the SharkTuner acts as the interface between the laptop and the LH ECU.

The SharkTuner allows the operator to make changes in real time to the software of the LH ECU by modifying a special EPROM binary files provided with the SharkTuner. The standard EPROM is unplugged from the LH ECU, and the SharkTuner data lead plugged into the EPROM socket.

The SharkTuner is powered by the diagnostic connector fitted to all 928s. When any changes to the EPROM data have been finalised, these changes are saved, and this new data file is programmed into a new EPROM, using a low cost EPROM programmer. This modified EPROM is then fitted to the remapped ECU, which then can be refitted to the car.

The SharkTuner is now also available with a LH2.2 update option which allows full fuel remapping for the 85/86 LH2.2 equipped early US/Euro 32v (engine types M28/43 & 44 and M28/45 & 46), and also the Euro 16v LH2.2 MY85-86 (engine type M28/21 & 22). Please note that the early MY 84 Euro 16v is not supported at present. Some features available with the LH2.2 SharkTuner are not available with the LH2.2 version, as indicated below. This update also adds a set of auxillary inputs which can be used for real time monitoring and datalogging of external sensor inputs e.g boost sensors. The WBO2 input law can also be edited for use with more variants of WBO2 systems. Please refer to the LH2.2 User Manual, available from the link on the left of this screen.

NEW !! The SharkTuner family is now complete with the addition of the SharkTuner for the EZ-F igntion ECUs, used on the 85/86 early 32v cars, and also the 16v Euro cars 84/86.

The updated User Manual, which includes information on the EZ-F SharkTuner.

Functions &Features LH ECU

• Fuel map editor with operating point indicator
• Auto tune feature for fuel map - "tune when you drive" to a target air/fuel ratio
• Supports 19, 24, 30, 36, 42 lb/hr or any custom size injectors (not 42# with LH2.2)
• Adjustable rev. limiter
• Adjustable flappy valve control *
• Data logging with graphical output
• Status screen with real-time display of engine operating variables
• Adjustable idle speed S4/GTS 675rpm or GT 775rpm *
• Closed loop or open loop mapping
• Selectable code plug settings *
• Separate maps for closed loop or open loop running *
• Special maps for the SuperMAF for very high power applications *

* not LH2.2 ECUs

In addition to changes to the fuel maps, the SharkTuner also allows manipulation of other parameters such as high rpm fuel cut off point ("rev. limiter"), the operation of the inlet resonance valve ("flappy") and fuel cut off under deceleration.

 

The SharkTuner also provides a data logging facility of many useful parameters. The data logger can run continually, or be triggered at rpm greater than 2000, or when the wide open throttle switch is closed (approx. 2/3 throttle open).

 

Data captured during a run can be viewed in tabular form in the data logger window or displayed in the graphics processor included on screen.

Alternatively, the data table can be copied and pasted into an Excel spreadsheet using the "Copy all run data" tab, where it can be viewed in tabular or processed using the Chart Wizard into graphical form. Data from several data runs can be displayed on the same graph.

The "System monitor" screen gives useful real time data on the running conditions of the engine under test and modification:

Manipulation of fuel maps is possible on a cell by cell basis, or by capturing a group of cells and incrementing them on a user selected percentage basis, or by a known fixed percentage.

Rapid initial remapping can be carried out with the "Autotune" feature on the applicable fuel maps. Idle, and cruise and WOT CO levels can be auto adjusted to a target value.

Wideband Oxygen Sensor

The SharkTuner is designed for use with a wideband oxygen sensor and associated electronic hardware. A wideband O2 system is essential for any fuel remapping. The standard O2 sensor with add on lambda indicators are NOT suitable as their operating range is too narrow.

A TechEdge WBO2 circuit board type 2A0 can be provided, installed into the SharkTuner box.

Alternatively an Innovate Motorsport LM1 can be used remotely and connected via a lead supplied with the SharkTuner. Please specify this option at time of ordering. A more cost effective sensor system from innovate is their LC-1. See their website for further details.

Functions & Features EZK

• Full set of igntion maps with operating point marker
• System monitor screen with Hall and knock sensor fault indicators
• Full real time monitoring of igntion knocks
• Real time monitoring of per cylinder igntion retard applied by knock protect system
• Comprehensive data logger with graphical output option
• Detonation igntion retard step size and max value of retard editable

 

Cruise ignition map

 

 

System Monitor screen

Parameters screen

SharkTuner Requirements

• A wideband oxygen sensor and associated electronics (see previous paragraph)
• A laptop computer running Windows 98SE/2000/XP, with a serial port (9 pin "D" connector). If a serial port is not available, a USB to serial adapter can be used. Also, in many laptops the laptop itself does not have a serial port but the docking station for the laptop has one.
• A low cost EPROM reader/writer click here or click here. These devices require a parallel (printer) port. Alternatively, you may find a local electronics shop that will blow EPROMs for you to your modified files
• A supply of 27C128 or 27C256 EPROMS 120nS in 28 pin DIL plastic package. You can use one time programmable or UV erasable devices.
• A good general knowledge of the principles of engine management systems.
• Be "computer literate"

 

Availability & Pricing

The SharkTuner is available now.

The basic LH2.3 SharkTuner for 87-95 cars is $1750US, £850UK and 1275 Euros delivered. The EZK option is $300US extra. The built-in Tech EdgeWB02 board is available at an additional cost.

The LH2.2 option for 85-86 cars is at an additional cost of $500 if purchased with the basic LH2.3 unit, or $600 as an update to an existing customer unit.

The cost of an upgrade of a standard MAF to "SuperMAF" specification for very high power engines is $100USD