Tbi?
07-16-2016, 09:46 PM
#1
Tbi? I have an odd question.
Can any of the LS ECMs be used to drive an old GM throttle body injection system?
I'm thinking there may be a difference in the injector impedance that would make the idea unworkable.
Ken
Can any of the LS ECMs be used to drive an old GM throttle body injection system?
I'm thinking there may be a difference in the injector impedance that would make the idea unworkable.
Ken
Last edited by Kenova; 07-16-2016 at 09:52 PM.
07-18-2016, 09:21 AM
#2
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Injector Current Requirement Most TBI injectors (Ford) are 2.4 Ohm, most (GM) TBI injectors are 1.2 Ohm.
The common LS-x injectors are 14 Ohm.
Ohm's law would state SIX-TEN times MORE current needed for the average TBI injector.
This will fry/turn on fault protection in most LS-x EMS.
The chance to modify a TBI using a 14 OHM injector is good.
The injector frequency would also need to be changed.
The cost of the tuning software needs to by considered.
Most cases are found to be more expensive than just to switch to a aftermarket
ECU, one such item is my ECU-882C
Lance
The common LS-x injectors are 14 Ohm.
Ohm's law would state SIX-TEN times MORE current needed for the average TBI injector.
This will fry/turn on fault protection in most LS-x EMS.
The chance to modify a TBI using a 14 OHM injector is good.
The injector frequency would also need to be changed.
The cost of the tuning software needs to by considered.
Most cases are found to be more expensive than just to switch to a aftermarket
ECU, one such item is my ECU-882C
Lance