Knock module for MS3 (beta test)

[jsmcortina]

I have developed a two channel knock-module as an internal add-on for MS3.

knock module

knock_module.JPG (66.44 KiB) Viewed 4378 times

The board mounts directly to the top of the MS3 card, fits within the standard case and works with the standard ribbon cables.
For communication with the MS3, it uses 'D14', 'D15', 'D16', 'JS11' and PM2. i.e. you CANNOT use 'LED spark' in conjunction with this board. at the same time.

knock module installed

knock_module_installed.JPG (77.37 KiB) Viewed 4378 times

It utilises a custom knock sensing chip from TI which features software selectable gain and frequency bandpass filters.
When the engine is running COP or sequential and the MS3 knows which cylinder is firing, the firmware allows different gains to be applied to each cylinder and the sensor level per cylinder to be reported.
The firmware allows a user-settable knock "window" (engine angle over which it listens to the sensor.)
You can take a look at these menus in the recent MS3 pre1.1 firmwares if you select "Internal" as the knock sensor.

The hardware works, but a few component values may need optimising based on field trials. The firmware is written but again needs wider field testing to fully prove it out.

I have a handful of assembled boards available.

James
(Edited to add more of the firmware features)

[elaw]

Dibs!

PM sent...

[bcrx7]

Hello James,
I would love to give this a try on the my turbo race car. It is a 4 cylinder (Miata) engine running 20PSI making just under 550HP.

[bubba2533]

For communication with the MS3, it uses 'D14', 'D15', 'D16', 'JS11' and PM2. i.e. you CANNOT use 'LED spark' in conjunction with this board. at the same time.

I have a difficult time remembering all of the uses and the designations for each pin/pad and function for all of them. The best thing I could find is this http://msextra.com/doc/ms3/hardware.html#pins but it doesn't have PM2 on it. I do know that D14, D15, D16 are related to the LED's and that's about it, but for new people I think that this is something that could be greatly improved.

I don't really have any great suggestions for how to improve it, mainly because I don't understand it very well.

Edit: I am also interested in a beta board for knock control.

[Reverant]

Is there a schematic available? I have an MS3 and a couple of these TI chips available.

[jsmcortina]

PM2 is presently only used with V10/12 running full sequential fuel. Otherwise it is just an unused pin hole on the MS3X.

I've worked out some pricing. This is based on low volume parts costs, with only a slim contribution to my assembly time and recognising that this is beta.

$60 assembled, bench tested and shipped to the USA using "Airsure" postal service.
$50 without testing.

Contact me by PM. First come first served.

James

[y8s]

So ready. Knock sensor is already wired.

[y8s]

how strictly does it rely on JS11?

Could I, for example, trade JS11 for "knock" on the MS3X?

I guess a general question: can you re-map pins and attach it otherwise. My "above MS3" is pretty tight because of P&H drivers...

[WestfieldMX5]

Interested as my MS3 is currently on the workbench.
What frequency is it tuned at?

[Matt Cramer]

What frequency is it tuned at?

Whatever you want it to be. Actually, there are a couple increments you pick from, but it's software configurable.

[jsmcortina]

The pins chosen are not flexible because most of them are the SPI interface pins on the processor.

James

[sjf911]

That is fantastic. I am running a J&S Interceptor with dual knock sensors so I could run these concurrently for testing as single channel each. Unfortunately, it will be a couple of months before I have my engine and transmission back together and in the car. I'll be happy to be a test mule at that time.

[gross polluter]

PM'd

[masterx81]

That's so nice!
I've still not see the tunerstudio settings about this, but there is the ability to change the attenuation proportional to the rpm? Would be nice also to be able to change the base frequency with the load, as when load increase the detonation frequency change a bit due to different chamber temperature (so different speed of sound). There is also the control of the integrator constant (another sort of attenuation avaiable in tpic)?
thanks for your work!

[sdezego]

This is fantastic. I would love to test this out as I have been running KnockSense MS for a long time. Would like to conjoin the hardware/software. Unfortunately, I am currently running LED spark on my current setup.

[NiceMan]

Good Job boys!!! Thsi is one what i waiting to my ms3 system =)
I have 2.0 Ohc motor in Ford Taunus Coupe 1975 and its running now MS3+ms3x.
Its myself madet 2.0i Turbo project and when this can order to Finland i order it =)

[Token]

Bought time! Haha. PM sent. I have a working car/MS3x setup with two OE knock sensors just sitting there waiting to be used!

[jsmcortina]

The small stock I had is now allocated, pending payment. I'll post here if/when any more are available. First, we need this batch solidly tested on engines.

James

[quark2501]

I would like when you have more or one payment is missing.

[savagerocco]

Put me in que......