GM ECU 1227730/47: basic questions / New Manifold on Old

[Kevin Vannorsdel]

One more opinion on mounting a "new" manifold on an "old" head.  There =
is a
machine shop here  in San Jose CA that is all jigged up to do this work=
.  They
modified my Performer TBI to fit the "Old" style heads on my 300HP  Che=
v
Crate.  It worked well except I had to use 12 point bolts in the center=
 holes
(needed the smaller overall diameter to get a wrench on them).

FYI...

________________________________________________
  Kevin Vannorsdel     IBM Arm Electronics Development
    408-256-6492                Tie 276-6492     kv at us.ibm.com






owner-diy_efi at coulomb.eng.ohio-state.edu on 11/04/97 05:46:56 PM
Please respond to diy_efi at coulomb.eng.ohio-state.edu @ internet
To: diy_efi at coulomb.eng.ohio-state.edu @ internet
cc:
Subject: Re: GM ECU 1227730/47:  basic questions


sfg wrote:
>
> I am using the 1227730 ECU and have a few basic questions:
> 1. since it is so common, where might I find the disassembled code?
>    (I'm using the EPROM 16139544 '87 K5 Blazer: manual trans, TBI)
> 2. Is the memcal a fuse-link type ROM?
> 3. Which application parameters are contained in the memcal?
> 4. I have noticed ref to a "P" suffix on the p/n. Meaning?
> 5. Is its driver circuitry capable of operating with the combined
>    load of 8 injectors wired in parallel?
> 6. Will it run a ZZ4 GM engine (24502609) (with the 10185071 camshaft=
)?
> I know this is a lot of info, but since this ECU is so popular, answe=
rs
> may benefit many people on this list. TIA   Steve
Steve, stay tuned....I should know #6, whether a TBI system can support=

a ZZ3 (10185071) camshaft within a few weeks. roller rockers are going
in now. Almost done.  Note that the alum heads on a complete zz3/zz4
engine are the old style bolt pattern....I've heard different opinions
regarding enlarging the bolt holes on newer manifolds to fit those
heads.



=