165 MAF computer

[Chris Bennight]

Now as far as the conversion goes I don't know, but I have a 96 LT1
(camaro) with a 94 8051 pcm in it.   With Ported LT4 heads and a 
cc306 (230/244 112lsa .544/.576)   I see MAF readings up to
around 340-350 g/sec.    Even on stock LT1's I have seen high 200's, 
so on a built motor - especially one with added cubes, 255 sounds
like a real impediment.  

If it helps here is the MAF transfer function for a LT1 MAF (though if
the variable limits you to 8 bits that's a problem - I know the LT1 has
a 16 bit variable for this).  If the tranfer function would be of any use
let me know and I will upload it.


Chris Bennight
http://www.slowcar.net
66 Charger For Sale
http://www.slowcar.net/charger



----- Original Message ----- 
From: "Greg Westphal" <gcwestph at erols.com>
To: <gmecm at diy-efi.org>
Sent: Friday, June 29, 2001 8:52 PM
Subject: Re: 165 MAF computer


| I saw 160 gps out of my internally-stock 305 with the small stock cam,
| headers, 3.42 gears, and all the little mods.  My best time at the track
| last fall was 14.86 @ 91.0 mph, and it dyno'd this spring at 172.5 RWHP
| and 277 lb-ft of torque, and it was down 30-40 horsepower from last
| fall.  I know I've seen guys with built 350/383 engines peg the MAF at
| 255 gps, plus (as someone else mentioned) it's set up in the code to be
| the max due to the hexidecimal system.  With my 355 I just installed,
| I'm curious to see if I can peg my MAF meter too. :-)
| 
| Greg Westphal
| '87 IROC
| 
| "Marteney, Steven J." wrote:
| > 
| > 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
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