has anyone tried this?

[steve ravet]

You'd need two spark signals if you're trying to measure advance.  On a
distributor engine there should be a reference and spark signal
available at the distributor, no inductive pickup needed.  For DIS you'd
have to tap into the crank sensor and spark signal.  Would be a way of
getting a spark curve out of a non-ecm vehicle to use as a starting
point for an efi conversion.

--steve

Jeff Bromberger wrote:
> 
> I'm getting ready to add an aftermarket computer to my honda civic... my
> concern is not the WOT tuning but rather the drivability/fuel economy type
> stuff... i was thinking that it would be really handy to have a tool that
> would log conditions in the current factory PCM to build a profile of the
> fuel and timing maps... i'm picturing two inductive probes: one for spark
> plug wire #1 and one for injector wire #1... beyond that you'd only need the
> map sensor signal.  the software that is monitoring these signals/pulses
> could fill in the standard 2D tables for fuel and spark and give you a big
> headstart when you go to tuning the aftermarket efi system "from scratch"...
> does anyone make anything like this?  I could definitely write the software,
> but beyond a few basic PIC projects, i'm not that up on the hardware end of
> things... though i imagine the hardware would be fairly simple...  thoughts?
> 
> thanks,
> jeff
> 
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-- 
Steve Ravet
steve.ravet at arm.com
ARM,Inc.
www.arm.com
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