Ok, before your damage your engine, zero the AFR Spark adder table. These engines don't want more than 14* WOT spark timing and I would start at 12*
Then get a wideband and tune the WOT AFR to 11.0 as per my Open Loop Maf tuning guide. http://www.hptuners.com/forum/showth...en+loop+tuning
Russ Kemp