DIY EFI on 400ci smallblock?/ANHT

Wed Jun 20 05:16:33 GMT 2001

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
> > > >
> > >
> >
> --------------------------------------------------------------------------
> > --
> > > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the
quotes)
> > > in the body of a message (not the subject) to
majordomo at lists.diy-efi.org
> > >
> > >
> >
>
> --------------------------------------------------------------------------
--
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to
majordomo at lists.diy-efi.org
> >
>
>
> =====
> Trains, Trucks, and EFI at http://www.trailrunners4x4.org/users/realsquash
>
> __________________________________________________
> Do You Yahoo!?
> Spot the hottest trends in music, movies, and more.
> http://buzz.yahoo.com/
> --------------------------------------------------------------------------
--
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org