I have any Extender chip with 23* timing in lower gears and 21* in third. I am getting transitional knock (up to 18*) when the trans kicks down or from a slow roll. I do not get knock when into third gear. Would going to 21*/21* help alleviate this? I am using 93+denatured with 22# boost. Alcohol comes on at 10# and pump is at max.