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Poor performance...
Posted by nwas (more from nwas) on Wed, 27 Jul 2011 20:30:50
In Reply to: Re: The key phrase..., Philip Schall, Wed, 27 Jul 2011 15:16:56
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The differences are "the two DIC's have differing electrical characteristics, including that T5 is a capacitive discharge system while T7 is inductive; the T5 uses a thyristor to trigger discharge while the T7 uses triac; and there is a differing degree of knock amplification."
I can't testify to exactly what damage you will cause. The T7 WILL generate much higher level of signal when knock is detected. Whether or not the ECU will be damaged is unknown. The ionization that the ECU uses to measure performance WILL be affected since the spark characteristics are very different (short vs. long, DC vs. AC).
However, the most noticable issue would be performance. If any sort of knock is detected on your T5 motor, the DIC will send a very strong signal to the ECU, which will interpret that as significant knock due to the high signal level. Therefore it will retard the timing & boost, reducing your performance accordingly. If you run 93 octane all the time, it may not be an issue for performance.
Considering the cost of components in these cars, spending an extra $100 for a DIC seems like small money to cover large. When buying used, it doesn't seem to matter... the difference is negligable.
posted by 71.174.89...
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