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JimStimX MS3X Stimulator Expansion Board – Unassembled


SKU No: JimStimX-K
Description The regular JimStim can test the main board on your MS3. But what if you’d like to see the inputs and outputs on the MS3X expansion card in action,
In Stock


Description

The regular JimStim can test the main board on your MS3. But what if you’d like to see the inputs and outputs on the MS3X expansion card in action, too? Now it’s easy – just add a JimStimX! Use the three pull-off jumpers on the JimStim to connect the 5 volt power, ground, and cam signal to the JimStimX, and you can test the outputs with the LEDs and use the DIP switch and three trim pots to control the four on/off and three analog inputs.

This build it yourself kit includes everything you need to put a JimStimX together except the solder. Everything is included in the same pre-labeled bag styles we use in our MegaSquirt kits.

Requires a JimStim for proper operation, sold separately.

Megasquirt Simulator

Introduction

The Megastim/ JimStim is a piece of test equipment complementary to the Megasquirt. It is an excellent tool to use during and after assembly of the Megasquirt to confirm correct operation and to learn about how the Megasquirt reacts to the various sensor inputs before installing onto an engine.

Basic Stim

The Megastim is a the entry-level stim.

Basic Stim

Basic Stim

It simulates:
– CLT sensor
– MAT sensor
– TPS
– O2 sensor
– Distributor or EDIS RPM signal (only)
It has LEDs to indicate:
– the two output channels of the batch-fire Megasquirt
– fuel pump
– idle output

JimStim

The JimStim is a more fully featured stim.

JimStim

JimStim

It simulates:
– CLT sensor
– MAT sensor
– TPS
– O2 sensor (narrowband or wideband)
– spare potentiometer for additional sensor
– Many RPM signals equivalent to OEM trigger patterns with both crank and cam outputs. ‘Hall’ or ‘VR’ type signals.
It has LEDs to indicate:
– the two output channels of the batch-fire Megasquirt
– two bi-colour LEDs for stepper idle
– fuel pump
– idle output
– four spare LEDs for spark or fuel indication

JimStimX

The JimStimX is an optional board to complement the JimStim when used with the MS3X.

JimStimX

JimStimX

It plugs directly into the MS3X connector and has:
– 8 injector LEDs
– 8 spark LEDs
– 6 ‘PWM’ LEDs
– 3 potentiometers for analogue inputs
– 4 switch inputs
– connection for the MS3X cam input

 

Assembly

If you purchased a kit, you will need to assemble your stim, see:-

JimStim information (offsite)
Megastim v1 information (offsite)
Megastim v2.1 information (offsite)

Testing

Having assembled your stim, you need a source of around 12V DC e.g. bench power supply, ‘wall wart’, mains adapter or FUSED car/bike 12V battery. (A small 9V battery can be used, but may only last 15 minutes.)
– Plug the stim into your Megasquirt
– Connect your computer to the Megasquirt with serial or USB. See the Serial Setup page if you haven’t already.
– The stim is marked with +/- connections. Be certain to connect + from the power supply or battery to + on the stim.
– Turn on the power source and turn on the power switch on the stim (if fitted.)
– If this is your first time, then you may need to load firmware to your Megasquirt.
– Ensure your tuning software is installed if you haven’t already.
– Now, open TunerStudio.
– All being well, TunerStudio will connect and show some gauges. If it is showing “Offline” then you have a problem.
– Vary the CLT, MAT, TPS potentiometers (pots) and confirm that the on-screen gauges are moving.
– The response from the O2 pot will depends on the EGO/O2 settings in TunerStudio.
– The MAP sensor isn’t tested with the Stim – you need a small syringe and some hose. (Inkjet refill syringes are handy.)
– Ideally you now want to set the stim wheel mode to match the wheel mode your engine uses. The JimStim has support for a wide range of wheels. If you have the MegaStim them you can only simulate distributor or EDIS.
– It is common that the ‘VR pots’ on the Megasquirt mainboard may need a little adjustment to pick up an rpm signal when testing on the bench.

Product FAQ

Do I use this board or a regular JimStim to test an MS3?

  • You would use both of these boards, connected with jumper wires. The JimStim plugs into the main board connector, while this board connects to the MS3X.

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