Stroker timing question

[ma7008o]

I know that one option to built a stroker is to use “i” pistons, non 325i rods, and slave the block about 2mm.

But, how would changing the length of the timing belt would affect timing? Do I need to do any mods to the pulleys or the tensioner?

[nando]

you're using the i head right? then you don't have to do anything, just replace it with i parts.