Test of ARAP.... was 165 MAF computer

[Programmer]

Did you engine seem to like the timing ?? 5 more GPS...how did the upper
end RPM feel ?

Lyndon.
----- Original Message -----
From: Marteney, Steven J. <smarteney at xlvision.com>
To: <gmecm at diy-efi.org>
Sent: Tuesday, July 03, 2001 7:50 AM
Subject: Test of ARAP.... was 165 MAF computer


> 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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