Wanting to build a PCM bench tester??

[delcowizzid]

https://www.aliexpress.com/item/2015-Ne ... f97e400721 the expensive one lol

[delcowizzid]

Even obd2 simulation for making and testing cables lol https://www.aliexpress.com/item/Pro-ECU ... f97e400721

[antus]

That simulator looks good really good. The obd one looks like a joke. Would be very easy to brew your own with an off the shelf elm. Could do that in an hour of software development. Just a gui setting a couple of variables and a loop to spit out packets with pid and checksum.

[ejukated]

Is there 18/3x pattern supported and tested with Jimstim?

[antus]

I dont believe so, but it would be possible to add it and submit the mod back upstream. The supported trigger patterns are listed here: http://jbperf.com/JimStim/JimStim_v2_0_ ... .html#mode

I also just found this vendor now Im on a pc not my phone: https://www.diyautotune.com/product/jim ... assembled/

[antus]

http://jbperf.com/JimStim/JimStim_v2_0_ ... el_upgrade

It is possible to upgrade the wheel patterns in the JimStim CPU. There is a small application that has been created that takes a text file and converts it into the binary data used by the JimStim processor. This data is then sent to the JimStim CPU and also copied to a binary file.

From the stock config file

Code: Select all

// wheel patterns defined in here
//wheel0
// this is  dizzy, EDIS, whatever like old stim
//format of wheel pattern is
//output byte, delay factor (angular or time)
00,45,
01,45,   //1
00,45,
01,45,   //1
00,45,
01,45,   //1
00,45,
01,45,   //1
0xff

So you'd need to look at the GM pattern with degrees overlayed and add a line in the configuration and degree count for every time either chopper wheel has a transition/change. But you could upload it with the supplied tool over serial and dont need to modify the firmware to do it.

Also that pattern would only suit input in to an ignition module, which might be good for testing but the signal to the ecm is a regular pattern on 1 wire.

Also I just put one in my cart, looks like $26 post to au, so $121.16 USD delivered for Australians.

[delcowizzid]

Board and programmed processor is 28 us on it's own so that's probably a good deal

[ar5boosted]

Maf I spose you could use another one of these for all the rest of the signals can be trim pots.i used to use my sound card with a signal generator to do rpm but it didn't have the grunt to do it well.im looking to see if I can mode the file on the at mega so I can step up the frequency while it's all ready sending the signal currently you have to stop it step up the frequency and press start again

But for real testing, what I think you'd want to be able to do is simulate a quarter-mile run or some live event.

Actually, I have been looking at doing a GPS driven simulator where you feed in various GPS coordinates and get reactions.

Being a Software guy, I know that I can simulate WOT by setting acceleration to 100% for a period of time or till speed gets up to a certain level. We could set up various test cases in software by category.

It seems that we have a mix of skills here. It seems there are multiple places that we can get hardware. Figuring out some of the Chinese products can take longer than making them from scratch I've found. It would be interesting to do as open-source with a few contributors.

[delcowizzid]

Something that would play back tunerpro logs as inputs to the ecu would be the go

[ar5boosted]

Something that would play back tunerpro logs as inputs to the ecu would be the go

That seems like a reasonable objective. I'd commit to assisting to making that happen.

What programming language shall we use? Python or C++ ? If it's one of those then I can help.