Quote:
Quote:
Stock pistons will hold up well, IF you keep it out of detonation.

That way you said "IF" makes me think there's a narrow window for setting the timing on an EFI'd 225
It'll have electronic ignition by the time I convert too...
Looks like your question got dropped in all the smack talking - I'll see if I can pick it up, brush it off, and get you an answer.
Simply adding EFI to a slant six isn't likely to cause detonation unless you lean it out, but if you start by setting it rich and see how far you can back it off you should be safe. It's when you add a turbo that things get a bit harder. Too much boost for your octane rating and compression can cause detonation, as can leaning it out (even worse than on a non turbo motor). The timing window isn't particularly narrow, and backing it off too much won't make it ping. But it is easy to get greedy with a turbo and try to wring more power out of it than your system can handle.
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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair