Originally Posted by jwhitehead
have a 502 with a fogger, timing set @ 36, retard set @ 12, 1050 dominator with 88 front and rear jets,everything new, set up 300 shot, bottle full with 900 p.s.i. engine back fires thru headers , shut engine down. Checked plugs, electrode in porcelin on some plugs had started to melt.
set up 250 shot increased bottle pressure to 1100 p.s.i. car ran 1.16 / 60 foot, 5.38 @ 127 mph.
SB2 406 small block ran this good, what am I missing?????
Those carb jets are lean. Depending on altertude etc I'd be running 90-92's. 1100 psi is too much. The nitrous will be turning nearly 100% to gas. Should be 900-1000 psi. You should be running cold plugs with that much nitrous - 9's or 10's