prechambers mods?
prechambers mods?
that is dificult to say, well i do know till where i´ve been , i´ll try to explain.
i have a friend wich has a small device with a cable conected to a nr1 injector line and a stroboscopic light. so the machine reads injection pulse, and lights at the same time rendering posible to read the crankshaft numbers . if u´re familiar with this device disconsider my explanation.
in the papers for that machine , a multivalve MB type engine is said to be from 16 to 17.5 degrees, i understand 14º by the RIV method.
when i changed the pre cups, i left the engine at 21º(too much advance to make it easier to tune) , then reduced to 19º, now i have it at 18.5º i belive is the place where it works better, same as the previous precups at 2.5mm holes. the thing is the engine has a stange idle, and looks a bit dead untill high revs.
but lets wait a wile , u know that MB engines like to settle, maybe in a few days , this noises and behaviour changes. will see.