DIY EFI on 400ci smallblock?/ANHT

Wed Jun 20 19:10:36 GMT 2001

I just ran a compare on the ANHT and AUJP 8D from the FTP and you are correct, they are loads
different.  I wonder what the heck is in my truck!  It would seem that the locations I changed
were common in both AUJP and ANHT.

Squash

--- Len Sabatine <sabatine at epix.net> wrote:
>      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
> > > > > >
> > > > >
> > > >
> > > --------------------------------------------------------------------------
> > > > --
> > > > > 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
> 
=== message truncated ===

=====
Trains, Trucks, and EFI at http://www.trailrunners4x4.org/users/realsquash

__________________________________________________
Do You Yahoo!?
Get personalized email addresses from Yahoo! Mail
http://personal.mail.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