Tri-Power TBI

[Clarence L.Snyder]

Gary Derian wrote:
> 
> It seems to me that a tri-power TBI setup would work OK at WOT or center
> unit only but getting a good fuel distribution during the transition would
> be very difficult.  How is the ECM to know what the air flow distribution is
> between the three TBIs?  A small change in throttle linkage would throw it
> off.  If all 3 were the same size and worked together at all times, a
> reasonable approximation would be to inject an equal amount of fuel into
> each.
> 
> Gary Derian <gderian at cybergate.net>
> 
> >> >
> >> > >I have a 65 tri power manifold that I was thinking about using for
> EFI. It
> >> > >has the small center carb and big outer carbs
> >> >
> >> > I hope it sounds as neat as the tri powers did!!! I think all they did
> for
> >> > the bigger center carb (same size as the end ones) was bore out the
> >> > throttle holes larger for the center carb ('66 ??)
> >> >
> >> > SOMEBODY is making adapters that will get you from a Rochester base to
> a
> >> > Holley base (2 bbl). Have to search the memory banks!! :-)
> >> >
> >> tri powers had bigger end carbs and a small centre
> >>
> >> Clive
> >Just like any 4 bbl - small primaries for good idle and low speed
> >economy, BIG secondaries to tear the tires off when you mash it!!
Use 3 TBI units, including 3 computers. Each one would then respond like
a carb. Actually, 2 computers would do the job. One to run the "primary"
and one to run the 2 secondaries .