DIY EFI on 400ci smallblock?

[Len Sabatine]

     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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