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?????
first the botle pressure @900-psi is too low and will only get lower at the end of the run,as you use more nos.i would get it @ 1000-psi and purge it down to 950,at start of run so it should end @ 900psi with a 250-tune.1100-psi is too high.also a 250 shot at 28/28jetting is fat.you should look into the motor to see if you didn't damage it when you melted those plugs before you go any further because if you have some piston damage you will put oil into th motor and then bang.just my 02