Hi I have a 09 335i that has down pipes, charge pipes, intercooler, aftermarket blowoff valve and several other add ons,
so long story short owned car for short time and spun bearing, building new motor for it and changing pistions to JE forged pistions, The ones I'm finding if I'm correct are going to lower the compression ration .7 10.2 to1 and after will be 9.5 to 1
so with the way the car is now how is this going to effect it? what do I need to do about tunning for this? I know lower compression allows more boost? but I know everything has a cause and effect.
any advise? or should I try and stay with the 10.2 to 1 compression
so long story short owned car for short time and spun bearing, building new motor for it and changing pistions to JE forged pistions, The ones I'm finding if I'm correct are going to lower the compression ration .7 10.2 to1 and after will be 9.5 to 1
so with the way the car is now how is this going to effect it? what do I need to do about tunning for this? I know lower compression allows more boost? but I know everything has a cause and effect.
any advise? or should I try and stay with the 10.2 to 1 compression