[help needed] Parts Req - Ford Festiva - Stock Engine

[sketchman]

As it says. I'm ready to build one of these. Curious what I need to get going.

Don't need IAC control if that matters. Stock B3 engine.

[AndreyB]

You would need some boards - you have to decide if you want to go with individual 'modules' - small analog PCB & small injector PCB (this one can drive ignition, too), or you want to to use the http://rusefi.com/forum/viewtopic.php?f=4&t=359 board, or you want to make your own board out of something else. If you go with PCBs, you can order them either directly from the manufacturers - we have all the MFG files here - or from my store

The bare minimum to run a Festiva would be one multi-channel op-amp (dizzy signal input and VAF input) and 6 MOSFETs (four injectors + fuel pump + ignition module control), and a bunch of small resistors to surround these seven chips.

[sketchman]

Alright now say I want to convert to MAP sensor while I'm doing this. Still the same bare essentials?

[AndreyB]

This case you would be a MAP trailblazer. But yes, same bare essentials - sensors are just analog input channels. That's to the best of my knowledge.

[sketchman]

Oooh. Trailblazing.

I'm up for that I guess. I think I understand the basic theory of how MAP works. The computer would have a table to draw a base fuel req value based on RPM then modify it according to MAP signal, yes? Then things can get further complicated with a TPS input down the road.

Am I making sense?

[AndreyB]

AFAIK there is a difference between VAF/MAF and MAP logics. Air flow meter you just take analog value, but for MAP it's more complicated - you need multiple readings withing a particular windows of camshaft angles and then you average these values. So, there is some extra code which I've kinda started writing but have not finished or tested yet.

I'd say get it to some phase with VAF/MAF, by the time you get this assembled there should be some MAP logic progress.

[sketchman]

OK. I can be patient.

I'll start my order now.

[sketchman]

Also I just found this. Better deal than the AMP OE style ECU side only connector, and a better end result too IMO.

So many acronyms.

[AndreyB]

Delphi Packard Bulkhead connector Kit - this looks like a harness-to-harness connector?

I use www.ebay.com/itm/121122884285 and we have a board for this connector - we have a board for it http://rusefi.com/forum/viewtopic.php?uid=2&f=4&t=507

[sketchman]

Yes. Harness to harness by design, but one could easily substitute whatever case they use for the ECU as the bulkhead and do the wiring just as you are doing with the connector you linked. Or solder wires directly to the Frankenstein board from the inside connector half, which is my plan.

[sketchman]

Another question. When you say I need "a bunch of small resistors" how many and of which one does that mean?

I see 2 different resistors in the BOM and there are parts in the WiKi build page for Frankenstein that I don't see listed in there too. I'm a bit lost.

[AndreyB]

There are more then two resistors in the BOM. Current version - https://svn.code.sf.net/p/rusefi/code/trunk/hardware/frankenstein/digikey_parts_full.csv - has a the full list.

If you want to cherry-pick, the Frankenstein wiki - http://rusefi.com/wiki/index.php?title=Manual:Hardware_Frankenstein_board - should be helpful.

An average resistor costs 0.1$ so you might want to buy them in packs of 10. An assortment bag of 0805 components from eBay could also be an option - one bag of resistors & capacitors would take care of 95% of the 0805 part of BOM.

[sketchman]

OK. Thank you. That's not the version I had.

[AndreyB]

BTW there is also a 'compact' version - same data, just aggregated with qties https://svn.code.sf.net/p/rusefi/code/trunk/hardware/frankenstein/digikey_parts_compact.csv

[sketchman]

More questions. The BOM lists the VR chip, but the man page says not to use one. Not sure which to go with.

This might be why there is only one install so far. I'm having to dig quite a bit to figure out what I need. If you had a clear step by step page with a parts list for each step it would be much easier, I think.

Or I may just be an idiot. So I need a rusEFI for dummies page. I'd be willing to write one if I can get it figured out. Basically I need to know what parts I need for each section of the board because looking at a parts list doesn't make any sense to me. I understand what the individual parts are, but I don't know which chips need which parts. So I don't really know what to order.

[AndreyB]

Do you have a printer?

Because if you, you can print Schematic.pdf and look at it page by page...

Please tell me your wiki login (separate registration required) and I would give you Write permission, you would be able to improve the Frankenstein assembly page.

PS: can I move this thread into 'your engine' subforum because I see how this is becoming a build thread If want you can start another one there. If you want you can ignore this question. I am just not sure what's the best way to do it.

[AndreyB]

VR chip alone costs something $8. VR chip is requited for VR sensors.

VR chip can handle Hall and Optical, but it's cheaper to use plain op-amp analog input circuit. But that's only true if it does work - it works for me on my Aspire and it's the only installation, the red Festiva with a 323 here is work in progress and it seems like op-amp circuit works less then perfect. If you use the Frankenstein board you can choose which one to try.

[sketchman]

Ahh. OK, I'll start a separate build thread.

WiKi login is "sketchman". Just now registered.

I'll get the schematics printed off and dig in some more.