DIY EFI on 400ci smallblock?/ANHT

Wed Jun 20 18:55:56 GMT 2001

     Dave , you've hit that nail square on the head. Code wise , Y code 
normally
     doesn't "overlay" atop of F Code. I call em Gotchas .
     Len

>In the interst of discussion I disagree. a comparison of the data area has
>about a hundred differences, code area comes out shifted (when compiled from
>the source, ANHT has some MORE code in areas than AUJP.. therefore common
>routines are still there in both cals, but the start point for the routine
>may be more than one byte off in start location) and different in many
>places. in fact, the thing that has stumbles many a TPI F-car A4 tuner using
>AUJP is that they followed the ANHT hac locations.. which SHOULD be the same
>in the DATA area, but looking at the ANHT DOC, the addresses are a bit
>skewed in places.. some skewing is the result of mistakes in the document,
>some is real. an example is the RPM limiter. look at the addresses in the
>code section and count the bytes between the settings... see?
>
>other examples: 8031 (double entry), 81c7(FDB with no companion byte),
>3f9  - which is shown as RPM FUEL RETURN.. if you use this one as a 16 bit
>value, it won't give the results you expect. the address is shifted by one
>bit. rev limiter works much better if the correct location is used (did
>anyone give up on the rev limiter after being sent a ECU file from a 'some
>very smart guy on the net' with the wrong location???  well I say try
>GMEPRO.. its always correct ;-)... or you can roll your own like me ;-P.
>
>... hope some eyes are opened. I also hope I do not have some corrupted
>version of ANHT.. thats possible I guess.
>
>Budha bless the ANHT doc! it is responsible for more fun than a barrel of
>monkies but buyer beware.
>
>and I still don't know what is different.. is there a different A.I.R.
>system?  I knew once but I guess I forget.
>
>
>----- Original Message -----
>From: Squash <realsquash at yahoo.com>
>To: <gmecm at diy-efi.org>
>Sent: Tuesday, June 19, 2001 6:37 AM
>Subject: Re: DIY EFI on 400ci smallblock?/ANHT
>
>
> > From comparing the AUJP to the ANHT hac, they are exactly the same thing.
>I compared the bins
> > once, and I recall 1 difference in a spark table or something miniscule.
> >
> > Squash
> >
> > --- Dave Zug <dzug at delanet.com> wrote:
> > >
> > > I've a budget oriented 406 TPI in the works at the moment. Going on a
>T56 in
> > > a convertible thirdgen.
> > >
> > > Is not ANHT the TPI VETTE cal that does some control or monitoring with
>the
> > > vette trans?  what general tweaks are nessecary to run it in, say, a
>F-body
> > > without these tranny (or whatever they are) features?
> > >
> > >
> > > -Dave Z
> > >
> > > 89 Iroc - '730 - 383 large tube MAP TPI, ZZ3 cam ,dry NOS 50 shot.
> > > 12.79 @106 / 12.08 @ 112.   www.delanet.com/~tgp
> > > 92 25th annev convertible  305 / T56.  268 mph in a perfect vacuum.
> > > ----- Original Message -----
> > > From: Hector <hecyeah at prodigy.net>
> > > To: <gmecm at diy-efi.org>
> > > Sent: Monday, June 18, 2001 7:14 PM
> > > Subject: Re: DIY EFI on 400ci smallblock?
> > >
> > >
> > > > I'm going to convert to EFI a similar engine: 10:1, 64 cc  AL heads,
>404
> > > ci,
> > > > home made PFI. I had been looking at the AUJP as a base but
>considering
> > > that
> > > > a Vette engine had AL heads and such, I'm now thinking the ANHT.
>Mainly
> > > for
> > > > the timing tables. Oh yeah, and for the limp mode as I need a calmap
> > > anyhow.
> > > >
> > > > Hector
> > > > http://soflaspeed.freeservers.com
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Len Sabatine" <sabatine at epix.net>
> > > > To: <gmecm at diy-efi.org>
> > > > Sent: Monday, June 18, 2001 11:20 PM
> > > > Subject: Re: DIY EFI on 400ci smallblock?
> > > >
> > > >
> > > > >      Starting with *8 Injectors [ Port ]  , an 8262 ECM , and AUJP
>as a
> > > > base,
> > > > >      will produce much more satisfying results IMHO.
> > > > >
> > > > >    Len
> > > > >
> > > > >
> > > > > >List,
> > > > > >
> > > > > >I have been trying to grasp DIY EFI by reverse engineering the code
> > > > > >my P4 ECM out of an 88 4cyl fiero, and so far it has been quite
> > > > > >frustrating/unbeneficial.  I understand the assembly code just
>fine,
> > > > > >but not the ability to truely reverse engineer it and understand
>what
> > > > > >it's actually doing - it's difficult to recognize the purpose of
>most
> > > of
> > > > > >the subroutines and code.  I've kind of given up on this project
>for
> > > > > >now.
> > > > > >
> > > > > >That doesn't mean i'm out of projects, yet.  :)  I am in a buildup
> > > > > >process of a 400ci smallblock chevy bound for a 71 camaro, and
> > > > > >i'm wondering about the prospects of converting it to a '747 TBI
> > > > > >setup.  I'm thinking a project like this should be a LOT easier,
>given
> > > > > >the large amount of knowledge and work already gone into the '747
> > > > > >ecm, as opposed to some 4cyl ECM nobody cares about!  :)
> > > > > >
> > > > > >Question is, how much motor can the 747 ECM be made to deal
> > > > > >with?  Here's what I've got, if anyone with some knowledge of what
> > > > > >the 747 can and cannot do (or good/bad uses of it) could let me
> > > > > >know if i'm barking up the right or wrong tree, would be greatly
> > > > > >appreciated!!
> > > > > >
> > > > > >10:1 400ci smallblock chevy w/ 5.7" rods
> > > > > >
> > > > > >GM's 'fast burn' alum heads (the 210cc intake runner heads) in as-
> > > > > >cast configuration with stock valves (2.00/1.55) with valvesprings
> > > > > >appropriate for my cam choice
> > > > > >
> > > > > >exhaust will be headers with 1 3/4" primaries, full length tubes,
>to a
> > > > > >2.5" dual exhaust with full tailpipes and crossover pipe
> > > > > >
> > > > > >performer RPM air gap for the vortec head bolt pattern
> > > > > >
> > > > > >cam is mech. roller, 232/240 @ 0.050", 0.505"/0.523" net lift, 112
> > > > > >degrees lobe sep angle
> > > > > >
> > > > > >and all the necessary high quality fasteners, machine work,
> > > > > >attention to detail and clearances, etc. to make it a reliable
> > > > > >street/strip motor...  oh yeah, the car is a manual tranny car,
>4spd
> > > > > >for now, oneday to be a 5spd or 6spd but definately always a
> > > > > >manual.
> > > > > >
> > > > > >Basically, it's a ZZ430 crate motor with 50 more cubic inches, a
>bit
> > > > > >better intake, and a bit bigger cam.  If the ZZ430 was capable of
> > > > > >430HP   out of 350ci, I reasonably anticipate an honest 450HP if
>not
> > > > > >a bit more out of this 400.
> > > > > >
> > > > > >So, anyhow.  Is this a good candidate for a '747 TBI setup?  Can a
> > > > > >'747 run a 4bbl TBI?  Can the '747 deal with a moderate cam that
> > > > > >may not idle like a swiss timepiece?
> > > > > >
> > > > > >Any comments greatly appreciated!!!!
> > > > > >
> > > > > >nick
> > > > >
> > > >
> > >
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> >
> > =====
> > Trains, Trucks, and EFI at http://www.trailrunners4x4.org/users/realsquash
> >
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