165 MAF computer

[Bruce]

This be one of em times when having a known good MAF would be worth it's
weight in gold.  In the GN world there are no new MAFs, and the aftermarket
ones are a 50/50 gamble that they might even be close.

What kinda of pulse widths, and timing are you seeing?.
If the engine is getting plenty of fuel, and the timing is right, it should
run.
On the GNs, they sometimes add all the fuel at the max grm/sec, and then
just let the motor go rich till it gets past the end of the table, where it
leans out again

A friend figured out when picking components out, that say drop .1 or .2 sec
off of your ET, reguardless of how many items you use that claim that, it's
always the same .1 or .2 <g>.....

Too much timing,
too much fuel
will prevent an engine from running hard enough to make enough HP to use the
available air.
Bruce



----- Original Message -----
From: "Marteney, Steven J." <smarteney at xlvision.com>
To: <gmecm at diy-efi.org>
Sent: Friday, June 29, 2001 4:20 PM
Subject: RE: 165 MAF computer


> I'd like to believe horsepucky too but here's what recently happened to
me.
> I did a full-throttle run, no track just empty run, and a bud watched
> Diacom.  The reading never went above 175gps.  I'm in the same boat this
S10
> guy is in.  Lots of mods "the thing should just fly" but my performance
> sucks.  Granted I also suck at tuning which is slowly being corrected.
I've
> used the HomeDyno/StreetDyno programs and it says I'm making 266lb-ft of
> torque peak.  I then ran those curves into a drag simulator (that I'm
> writing myself) and it predicted mid-15 second times.  I work at place on
a
> back-road that just happens to have two stripes 1/4 mile apart.  Had a
> friend time me with a stopwatch (in the car and he weighs 300+lbs) and the
> car did 16.2 at about 85+ on the speedo.  Pretty crappy for an 89 TPI
> Formula ZZ3 cam, SLP 1 3/4" headers, RandomTech cat, fully balanced,
> flat-top pistons, flowmatched injectors, K&N filter.  Never seeing the MAF
> reading go above 175gps makes me suspicious.
>
> Steve
>
> -----Original Message-----
> From: Scot Sealander [mailto:Sealand at clarityconnect.com]
> Sent: Friday, June 29, 2001 3:43 PM
> To: gmecm at diy-efi.org
> Subject: Re: 165 MAF computer
>
>
> Programmer wrote:
>
> > The '165 MAF only computer is limited to sensing 175 grams per second,
> > maximum power is around 200 HP and that's it. This is the word from one
> > of the original guys that made ACCEL's DFI system.True or horsepucky ?
>
> Horsepucky.  The MAF code dies at 255 gps, or about 325 HP.  The MAF is
> about the same.  The TPI's maxed at about 245 HP from GM as I recall.
>
> Scot Sealander
> --------------------------------------------------------------------------
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