Boring a AL block is a cubic $$ proposition and the M42/M44 block has little room for an overbore.
The only cost effective displacement increase is a stoker crank from a diesel..
(Search on M47 I believe...)
Dave __________________
Dave - PDX
1995 318ti - Active Black and Tan.
2005 330xi - Mtech 1 - 6spd - Orient Blue/Black |