Im running 21* of timing!

[91evilstang]

I orignally set my timing to 19* on the stock balencer and had no pinging so i assumed the outer ring if the balencer had slipped and i was in reality only running like 16 or so but last night i installed a fluidamper that is solid (no inner or outer ring)and rechecked my timing Its 21*!when i plug in the spout connector adn rev it it hits 40* or so!So heres the questions 1:why will my car tolerate 21* of base timing ping free? 2:would i benifit from turning it down to like 18* and if so why? I have a five speed computer and msd 6al box with a mallory coil if that makes any differance.Well like always any feedback is greatly appreciated. Im really confused.

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91GT Flowmaster 2 chambers,off road H pipe,mac equalength headers,F303 cam,high lift valve springs ,svo 1.6 roller rockers,19*timing,410's,BBK cold air kit,hurst shifter, Pullys,World class T5 MSD 6al box. Ran 13.5@101 with stock headers and air box.