1982 z/28 crossfire -----------with a 355 eng, already added cam, exaust fuel pump, injectors [vett], vett prom chip, but veh has major spark knock [bad], and cant seem to find out why,?? also has inline holley pump [15psi]-help.----plugs look very lean

 

Well you're probably lean because you're probably running out of fuel. Try turning the fuel pressure up. Also, that Vette prom chip worries me because I think those chips had a lot of spark advance because the engines had aluminum heads. That would be the cause of your spark knock if you ask me.

 

you need to datalog bad(winALDL). and stay out of WOT till you improve the tune. if you want the car to run immediately consider buying a chip. but then still need to datalog(reburn) to improve that marginal(unless you are lucky) tune you just purchased. another candidate for tuning!