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I don't have all the details... but the red t5 uses a knock signal that is significantly lower than the black t7. So a red DIC in a T7 car results in a lack of knock detection. A black DIC in a T5 results in excessive knock detection.
Worse yet is that the actual method for creating the spark, the signal type, and the spark duration are very different. Below is some content I borrowed from another forum (unfortunately I can't post the actual link in this forum):
"All DI cassettes are "capacitive discharge".
Short description of RED cassette:
The DI Cassette is feed with B+(12V), the B+ is then converted to 400 VDC, inside the DI C. There are four individual ignition coils.
Between the 400 V capacitor and each coil there is one thyristor per coil.
When the ECM triggers the thyristor, energy that has been stored in the capacitor will be dumped into the primary (winding) side of the ignition coil.
As a result there will be a hi voltage across the secondary side.
The duration of the "spark" is quite short, because the use of a thyristor. (DC spark)
BLACK cassette, well more or less the same description, BUT with one important difference: we don't use a thyristor to dump the energy, we use a triac.
The difference between a thyristor and a triac is that the thyristor will only conduct current in one direction, triac in both directions.
And that's why we get a AC spark in the BLACK cassette.
The BLACK cassette's spark duration is approx. three times longer than the RED."
posted by 71.174.89...
, Tue, 26 Jul 2011 08:49:52
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