which outlet kneck was needed for magna mpi   i think it was 87?   can someone please confirm   thanks

ok  i haven't heard  much about these  valves ,  other then  you  had to have certain ones  in order to run  diff cams, found this out  over the  week end,,   short valves   are hyd  lifter valves long valves are solid rocker   valves whats that  mean, well each  valve has it's own  set of keepers and  upper retainer plate,,AND they will not mix and match , mixing them up will  guarranty a drop'd valve , and we don't want to see that     so what this means is if you are changeing the  valve

Take a look at these   www.e3sparkplugs.com

Well, the MPI car is up and running, did some tuning on it, but only in the garage at the moment, as I am waiting on the muffler to arrive. Anyway, I seem to have leveled out the flat spots through the RPM band, and she idles real nice, maybe a little rich. KNob is right at 12 o'clock, and according to my AF gauge (autometer) it idles at the last yellow/first green. All is fine until the fans kick on, and the idle drops real low, and gauge goes to full lean, it isles like crap, and when the fans