Two TBI units, one ECM

[CSH-HQ]

No, each of the cross fire TB are single injectors, not dual
Grumpy



At 10:38 PM 11/9/99 -0600, gmecm at efi332.eng.ohio-state.edu wrote:
>What does the twin TBI 84 Vette/Camaro use???  (someone here knows) Would that
>work with two 454 TBIs??  Tom
>
>Walter Sherwin wrote:
>
>> Ummmm..............the "749"  houses two 4/1 Amp peak&hold injector current
>> drivers, which were originally intended to drive two individual parallel
>> sets of 2/.5 Amp peak&hold Rochester port injectors.  This particular box
>> was expected to drive the the two pairs of injectors in either SSSF or SSDF
>> port fuel mode.  Both electrically, and programatically, this is entirely
>> different than what is required for dual channel TBI control, especially if
>> you want to run "twin" TBI's.
>>
>> For "twin" TBI's, your best bet is to procure a TBI box, and add an external
>> 2-input to 4-output 4/1 Amp peak&hold injector driver box.  All of the other
>> electrical and programatic options are serious compromises, no matter the
>> cost savings.  Remember, each TBI injector expects to see 4/1 Amps for
>> proper operation and control.
>>
>> Walt.
>
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