Test of ARAP.... was 165 MAF computer

[Gabe]

FWIW...

I ran my truck again last night - running mildly altered ARAP code.  Got a 16.5
@ approx 80 mph (as reported by my monitoring software) - pulled 181 gms @ 4800
RPM @ 49mph.  GMS began to drop a little as I climbed past the 4800 mark.  As it
shifted into 2nd it dropped thru the 4800 mark, gms hit 180 again for a split
second (kinda neat seeing this sort of info).

I'd sure think a built 350 should draw a whole lot more air than my old worn out
stock 305.  Bearing in mind that this is originally an '85 engine, so it has a
little more "wild" cam than the 86 and later 305 autos.

Question, how do you like the street dyno software??

Thanks
Gabe

"Marteney, Steven J." wrote:

> Okay I ran ARAP last night unmodified (cept for TCC stuff).  It behaved as I
> remembered the other stock cal behaving when I first fired the motor.  (One
> big exception it actually will start when it's warm.  To correct that in the
> other chip I changed Base PW Correction vs. Battery Voltage for values below
> 12V.)
>
> The big news is I shattered the 175gps barrier... got 180gps.  As with my
> other chip, the BLMs were always high 150's or locked at 160.  The BLI's
> were typically low 130's, so it really wants fuel.  Went into closed loop
> mode very quickly, probably less than a minute.  Cold idle was severely
> erratic, had to two foot drive it.  Once it got warm the idle settled down.
> Off-idle stumble is bad.  Again, all things I experienced with the stock
> chip.
>
> Wow.  Now I'm confused.  Just looked at ARAP compared directly to APYU in
> TunerCat (fair comparison???).  ARAP has WAY more advance in the main spark
> advance table, typically 7-10 degrees more in the high rpm, high load areas.
> But, ARAP's WOT Advance @4800rpm is 7 degrees less than APYU.  I guess one
> question I have... is the WOT Spark Advance vs. RPM table simply added to
> the main timing map value (less knock retard, etc.)?  I think I'm going to
> break the rest of my timing questions out into a seperate thread.
>
> Steve
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