Test of ARAP.... was 165 MAF computer

[Marteney, Steven J.]

First, I don't really know what the timing was since this chip had more WOT
timing but less main timing.  Upper rpm felt good but my butt-o-meter is not
a good reference.  I need to do a "dyno-run" to really compare.  I think I
may start my tuning by setting the WOT spark table to 0 for 3200 and 4800
rpm and see what happens.  But the 730 is fast approaching, once I get this
dang vacation out of the way!!!

The motor happily pulls to 6k... just not very fast.  When using the street
dyno software the torque curve is virtually flat from 2000-ish to 4000-ish
rpm then drops off.  For reference, below are some points from my last "dyno
run".  I edited the list to make it as short as possible.  They are rpm,
torque in ft-lbs.  A stump-pulling, heart-stopping, axle-snapping peak
torque of 250 ft-lbs!!!  I typically do NOT use the s/w's features for
correcting for unknown frictioncal losses, and I leave the SAE correction
parameters the same, factor now is 1.024.  Also note this (I believe was
done in 1st gear, 2nd gear raises it 5-10ft-lbs, and I don't have 3rd gear
data.)  Also, for reference, the Dyno2000 program reports flywheel torque
well over 400ft-lbs.  As I said, I got some work to do.

1820,211
1910,226
2010,232
2110,235
2210,236
2310,237
2410,238
2510,239
2590,240
2650,240
2770,239
2790,240
3290,240
3410,246
3530,249
3650,250
3730,248
3810,245
3910,238
4010,229
4110,221
4210,219
4310,218
4410,216
4500,212
4600,206
4700,200
4800,193
4900,185
5000,177
5100,169
5200,161
5300,152
5400,138
5500,133
5600,128
5700,121
5800,114
5860,108
5900,100

Steve

-----Original Message-----
From: Programmer [mailto:nwester at eidnet.org]
Sent: Tuesday, July 03, 2001 11:55 AM
To: gmecm at diy-efi.org
Subject: Re: Test of ARAP.... was 165 MAF computer


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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