Delco spark only computer

Ecu Hardware Modifications
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Delco spark only computer

Postby BennVenn » Mon Mar 14, 2016 4:50 pm

While searching for a new cpu for my '808 to fix a broken usart I came across what looks like 10,000+ NOS delco timer IC's. These are the braun which allows a 2mhz ecu to precisely control and calculate spark and fuel delivery to an amazingly precise tolerance.

At only $4 ea I am thinking of pairing up one of these guys with a modern usb equipped microcontroller and make a pretty high end spark computer for my dirtbike or any other engine looking for digital spark control.

I'll need to look into the available source code to see exactly what is done in these chips and reverse engineer an equivalent block diagram.

Anyone here have a use for such a device?

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Re: Delco spark only computer

Postby Biggvl » Mon Mar 14, 2016 4:57 pm

Yep, was chasing something of the sort a while ago, the vehicle is still around running less than great timing...

http://pcmhacking.net/forums/viewtopic.php?f=22&t=4044
According to chemistry, alcohol is a solution...

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Re: Delco spark only computer

Postby HQ355 » Mon Mar 14, 2016 5:17 pm

I wondered what happened to that

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Re: Delco spark only computer

Postby BennVenn » Mon Mar 14, 2016 5:49 pm

Interesting read. I was surprised he was open to the idea of anything other than original.

I'll build a development board this weekend with the Delco IC and see what it can do. For me a single coil is enough but if I plan on selling these down the road I'll probably design it with 3 or 4 outputs. Perhaps more. Might throw in some programmable logic to decode various types of triggers too.

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Re: Delco spark only computer

Postby VL400 » Wed Mar 16, 2016 4:10 pm

With the cost of modern micro's and the speed they run at, along with known interrupt latency, it seems like a lot of hard work using the old delco IC.

My take on the problem of getting a delco interfaced to various engines used a atxmega32. Does the job nicely with the extensive interrupt options ... viewtopic.php?f=11&t=2913

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