1.8 TBI and the 7747

[Bruce Plecan]

The 747 uses two injector drivers, and they fire alternately on every
ignition pulse.  The applications for 4 cyl TBI I recall are all single
head TBI's, so what do you do with the other injector line?.  Just
leave things dangleing isn't how I see to get it right.  I haven't seen
an oem application for a 4 cyl 747, and have no idea about what
table/sswitches/settings would be needed to change to run it that
way.
  The early S-10s used a 1227165 as a 4 cyl TBI, and with it's
single final drive, and it use being correct for what he was doing
looked like it would be a more likely doable arrangement..
  If you look at 808 they used it as a 4 cyl TPI, but with that there is
enough info., that that might be workable, as a TBI.
  There are all kinds of options but inho some seem more likely to
succeed.
  Personnally I'd probably wind up trying them all, but, I would start with
the easiest.
Cheers
Bruce



>ok, but for a small 4 cyl, why would I want a 747 vs a 165 ?? I woudln't
>know which tables to modify etc. just curious, I'm just about ready to go
>out and find a 165 ecu.
>Ted Stowe
 To: diy_efi at efi332.eng.ohio-state.edu
>> Subject: Re: 1.8 TBI and the 7747
>> I hate to blow it for the rest of us that know but in a 747 and others
>> just
>> get a calpak from a 4 cyl(ex. S-10) and plug it in to a 747.....its just
a
>> resistor network that gets the processor to understand the ticks while
>> cranking that it's a 4 cyl......then make sure you change the cyl select
>> in
>> the lookup tables so the "timing" is correct......blah blah and then some
>> -Carl Summers
>> In a message dated 1/23/99 8:45:25 PM Pacific Standard Time,
>> nacelp at bright.net
>> writes:
>> << Subj: Re: 1.8 TBI and the 7747
>>  Sender: owner-diy_efi at efi332.eng.ohio-state.edu
>>  Reply-to: diy_efi at efi332.eng.ohio-state.edu
>>  To: diy_efi at efi332.eng.ohio-state.edu
>>  I knew, you knew that, well maybe a couple other guys,do
>>  Bruce
>  >>  Oh, and what 4 cyl application used a 747?.
>>  >>  Bruce
>>  >None..
>>  >Mike V