tuneable ecm's

Discussion in 'Engine, Fuel and Exhaust' started by flhp70, Mar 13, 2016.

  1. flhp70

    flhp70 New Member

    can anyone give me more info on the S&S replacement for the magneti marelli ecm for my efi 96 ultra? Will it allow timing adjustments? or just fuel? I installed keith black pistons,and I need to retard my timing 4 degrees for break-in. Any info,or suggestions?
  2. dbmg

    dbmg Guest

  3. Breeze3at

    Breeze3at Well-Known Member

    I doubt retarding timing 4° is critical for break in.
  4. dolt

    dolt Senior Member

    The S&S unit is a good upgrade from the MM EFI but a converting to a carb would be better IMHO. Not sure why you think retarding timing 4* is necessary for break in though; I think you will be fine if you follow a good break in procedure. Done properly, the rings will seat in about 25 miles.;)
  5. Jack Klarich

    Jack Klarich Guest

    I am going to take a stab at this, my guess is some one said to retard the timing to put a load on the engine during break in BIG mistake IMO
  6. Fisherking

    Fisherking Active Member

    There is a good break in procedure on here some place . I think it goes like this .
    Third gear take it up to 60 miles an hour then off the gas and coast back to 30 miles an hour . do this only in third gear about ten times .
    If the cylinders where honed right it should seat the rings really well. I did this when I rebuild a 350 short block chevy. that old truck would pull.
  7. dbmg

    dbmg Guest