I've been away from this for a long time,  Bob - What's the BW on AFR

sensors & manifold pressure sensors these days? Can you see the in-

dividual cylinders in the data?  Do you want to?

RPM & Throttle position change relatively slowly by comparison.

IIRC your war horse is an RX-7 with a Ford V8 transplant?

Sounds like fun anyway...

   Jack

 ...


On 9/9/17, Bob Blick <bobblick@outlook.com> wrote:
> I was thinking about someday making a simple device for quick review of a
> few automobile parameters. I'm not doing any real racing anymore but I do
> still autocross and the occasional hillclimb, so the races are either und=
er
> a minute or under three minutes. Actually a lap on most road courses is
> usually under four minutes. Basically I am not the kind of person who por=
es
> over data or race videos or keeps a log book of tire temperatures. I don'=
t
> even really care about improving my driving that much, but I do care abou=
t
> the car, so after a run I'd like to look at data from the last lap and se=
e
> how things went. Stuff like air/fuel mixture, manifold pressure, engine R=
PM,
> maybe throttle position. I'd have some display I can scroll through. This=
 is
> not from OBD2 or a diagnostic port, I'd be grabbing data mostly directly.
>
> My car is not running right now, so it's not something I'm likely to do
> anything about until next year, if ever. Previous datalogging gadgets I h=
ave
> used or built just haven't been any fun so it'd be nice to do something
> simple that's more of a scrolling display of the last minute.
>
> Obviously one can sample data real fast and store all of it. That uses lo=
ts
> of memory. Sampling or averaging say once per second doesn't use much dat=
a,
> but can miss quick little events. So I was thinking about storing just th=
e
> peak minimum and peak maximum once a second. Sample fast, store and reset
> peaks once a second. It only uses twice as much memory as sampling once a
> second, but it'll catch any weird glitches.
>
> Thoughts?
>
> Thanks,
> Bob
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