well for a stock DX with the 2.2L in the US 6 BTDC is correct. With good 87 octane gas, 7~8 degrees is about max before you'll get pings. With 92, 12 BTDC works great.
You'll have to toy with it. Remember the best way to test is once the timing is set, rev to car to about 4k in Park or neutral. If no pings go for a hard drive and listen carefully. Then from a stop (only MTX tranny), start in 1st and skip to 5th, this puts some heavy load on the engine and 'induces' pinging. I wouldn't recommend it often because it is hard on the engine.
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