165 MAF Computer

[romans, mark]

I've done a few hundred chips, mostly for my car and a few friends
cars.  All of these cars have modified maf sensors.  At minimum the
screens are removed, at most the heat sinks too.
The ecm software is limited to 255 grams/sec.  The maf sensor will
flow more air than that, but the software can't read it.
My stock 87 vet would read up to 208 grams/sec, it ran 14.2 at 101 best.
I now have a 355 with Superram, Hot LT4 cam, TPIS headers, ported heads
and I max out the maf at about 4700 rpms.  Above that, since the maf is no
longer reading air flow the system becomes alpha n.
When a larger or more air flow system is used the maf pegs out earlier.
If your maf is reading properly and you are only reading 175 grams/sec then
your system just isn't flowing much air.

My car makes a bit over 300 rwhp, my best now is a severely traction limited
13.4 @ 107.7 mph.

I don't know where the 175 grams/sec came from, but I can guarantee it's
horse
pucky!

Mark

----- Original Message -----
From: "NickG" <nikog at mediaone.net>
To: <gmecm at diy-efi.org>
Cc: <nwester at eidnet.org>
Sent: Friday, June 29, 2001 8:14 PM
Subject: Re: 165 MAF Computer


> I've helped a friend reprogram his '87 Vette with a built up 406. His
stock
> ported MAF maxes out at 255g/s at around 4000rpm (as reported in Diacom).
> The only thing I can think of that might make a difference is that he's
got
> the GM replacement ECM for the '165 (don't remember the number off-hand)
and
> running ARAP code as a base.
>
> Nick
>
> > Hey guys...I'd like to know something, as I just withstood a
> > tongue lashing that kinda makes sense--yet I've heard otherwise
> > here.
> >
> > 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 ?
> >
> > I've had a go-round with a customer for the past 6 months, we've tried
to
> > get his rig up to snuff through the past 20 mailed out chips. Low speed
> > driveability is excellent--but his 1/4 mile sucks.
> > For the parts this S10 TPI thing has in it, it should just fly. I'd have
> to
> > say at this
> > point--forget the '165 if you're trying to make power, and put in a
'730.
> >
> > Lyndon.
>
>
> --------------------------------------------------------------------------
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