Fair enough. I'm sure we could soon stump up 2 sets of 2nd hand GM V6 injectors and enough bits of fuel rail to allow you to sort something out if you did want to go that route. I think it'd pay for itself in fuel savings in fairly short order. Then again, there is a charm about Weber carbs that isn't quite there with a fuel injection setup, especially when you've got 6 of them snorting away!
Regarding knock sensors, I think the early EFI setups have an analogue filter network customised to each engine that "rings" at the resonant frequency of the cylinder under compression pressure, so that cuts through a bit of the noise. You then window your sampling of the signal around TDC of each cylinder to cut out more noise, and check activity within this window against a threshold.
I'm guessing more recent ECUs probably sample the signal and process it digitally, perhaps more elaborately than that.
The thing is, the onset of knock doesn't really tell you the ideal ignition point, just that you're on thin ice. Great for an OEM that has to honour a warranty in the face of variable fuel quality and lack of driver mechanical sympathy. Not so good for someone looking to optimise an engine. That's where ION sensing is interesting, as it offers you the potential to tune it so the PPP occurs at the right crank angle.
If I get a tankful of cr@p fuel I generally notice that my engine starts to pink a little at low RPM with a bootload of throttle, so I make a mental note not to rag the @rse off it.
That's pretty much all a knock sensor would do for me, I think.
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Topic: Coil packs (Read 3480 times)