my shee currently has the timing advance but not sure how far. the plate is turned about quarter of a inch. i was told that is about +7. my mods are a clean up port job, 19cc cut head thanx to rudy kurtz,ported rad valve cages with reeds, filter pods, t5's and running 115 octane fuel with 180psi of compression. how much timing do you think i can run? i only drag it at a 500ft. dirt track.