GM ECU 1227730/47: basic questions

[Kevin Vannorsdel]

Another entry level question...

I am wondering why go with a Holley/Howell configuration instead of get=
ting
something from say- Turbo City (Big TB and a GM computer) that seems ch=
eaper
and similar in performance (??)   ?

Also- please post what you learn from your questions with Howell (if yo=
u don't
mind).    Thanks!

________________________________________________
  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 11/05/97 07:14:48 AM
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


John Zarli wrote:
>
> sfg wrote:
> >
> > John Zarli wrote:
> > >
> > > 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 c=
ode?
> > > >    (I'm using the EPROM 16139544 '87 K5 Blazer: manual trans, T=
BI)
> > > > 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 combin=
ed
> > > >    load of 8 injectors wired in parallel?
> > > > 6. Will it run a ZZ4 GM engine (24502609) (with the 10185071 ca=
mshaft)?
> > > > I know this is a lot of info, but since this ECU is so popular,=
 answers
> > > > may benefit many people on this list. TIA   Steve
> > > Steve, stay tuned....I should know #6, whether a TBI system can s=
upport
> > > 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 opi=
nions
> > > regarding enlarging the bolt holes on newer manifolds to fit thos=
e
> > > heads.
> > John, what are you using for injection? TBI or port? Enquiring mind=
s
> > need to know. Also, my GM service parts list (shows all the compone=
nts
> > in a matrix for the ZZZ, ZZ1,2,3,&4) lists an intake manifold
> > (10185063) as "dual bolt pattern" with EGR and applies to ZZ3 and
> > ZZ4 only. I'll stay tuned....    steve
> Steve, visit the GMGOODWRENCH website & you can download the GM
> Performance parts catalog (free). It has a wealth of info. The ZZ4 is=
 a
> great deal, but as it applies to newer engines...the dual bolt patter=
n
> is referring to the carb mounting. The intake manifold has an egr
> passage but the heads do not (go figure?) Also the head to intake bol=
ts
> are old style, middle bolts on new manifolds are at a different angle=