[DeTomaso] Carb looking EFI

Daniel C Jones daniel.c.jones2 at gmail.com
Thu Oct 25 13:13:47 EDT 2007


> Anyone with personal experience, or Dan Jones -like opinion?

It's a throttle body injection system that positions the injectors
inside what looks like the float bowls of a Holley look-a-like body.
It's not clear to me where the inectors point.  It's a speed density
which is somewhat less sensitive to cam overlap than mass air based
systems (like the Massflo) but still has limitations as overlap can
cause unsteady vacuum readings.  You only have 4 injectors, rather
than 8, so each injector has to flow twice as much.  This may compromise
idle capability.  Should be impervious to lateral g's and provide good
cold start manners.  Uses a modelling program to get an initial tune,
then uses a wide band O2 sensor to drive the system to goal air fuel
ratios.  Wide band O2 sensors are less releiable than narrow band sensors
and may be risky to leave in the system (a failed wide band could cause
a dangerous lean condition).  It does mention provisions to allow the
user to tune with a laptop.  Does not appear to provide ignition control
which is half the battle.

Dan Jones



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