Octane on the 5.0 Coyote

gkomo said:

Did they change the timing on the engine at all during the tests?

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Noobz347 said:

It does but only if there is room for advance.

The modern Coyote V8 is already at 12:1 compression ratio with direct injection maintained by the EEC.

Advancing timing so that the flame front begins [earlier] doesn't achieve the same things. There's no 'swirl' of fuel and gas to mix in the chamber before ignition. Instead, the fuel is injected much closer to the ignition event.

That modern ECU can "sense" all the old tricks and has the final say. This the portion you would have to modify.

You’re not really “sneaking timing into it” like the old days. The ECU knows where the crank and cams are, knows what timing it commanded, and still has the final say. If the calibration doesn’t ask for more timing or load, the computer is just going to correct the slop out of the base adjustment.

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