Got a mostly original 87 gn. 76k miles , tt 5.7 chip adjustable waste gate k &n a/f , scanmaster . under spirited acceleration car starts to audibly "ping" / detonation at about 10 pounds boost. I use only 93 /94 octane fuel. Maf is Newer but original style. I have a translater and new style maf not installed as yet and was wondering if the detonation is related to the tt chip and old maf. Fuel pressure and regulator seem to test ok. Haven't done fuel pump yet and its an original. Ideas on what is causing the detonation?