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If the engine uses mass air flow to regulate the air and fuel going into the engine it's more likely to actively use the knock sensor.
I think the easiest way to tell would be to use a live obd2 monitor rig get an idea of what the timing looks like. If it only ever goes to around 40 degrees or so it probably runs a fixed timing table. If it goes over 50 it's probably using the knock sensor.
Then to confirm put a few gallons of premium gas from empty in it and it should run even more advance.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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