thorburn 121 Report post Posted October 10, 2011 M50b20's are boring. Is the block the same as the m50b25 just with a smaller bore? Would it be suitable for boring to 84mm? I've been assuming it'll be fine. Thought I should check This is to put m54b30 gear into. Quote Share this post Link to post Share on other sites
_ethrty-Andy_ 2130 Report post Posted October 10, 2011 i really dont know anything about this sort of thing, but i would have thought using an M52 block would be better as its much lighter?? just a thought if it works Quote Share this post Link to post Share on other sites
thorburn 121 Report post Posted October 10, 2011 Unfortunately boring out an alloy block is a bit more involved as you need to fit new sleeves. I'd like to add some forced induction to it as well. Quote Share this post Link to post Share on other sites
_ethrty-Andy_ 2130 Report post Posted October 10, 2011 Unfortunately boring out an alloy block is a bit more involved as you need to fit new sleeves. I'd like to add some forced induction to it as well. I see! added to knowledge bank haha Quote Share this post Link to post Share on other sites
BM WORLD 1280 Report post Posted October 10, 2011 have a mate with M50b25 vanos engine block , with possible head gasget fail or cracked head , was still running ok just pressuizing the coolant system a bit , i think he wants $400ono call me 021433600 Quote Share this post Link to post Share on other sites
thorburn 121 Report post Posted October 10, 2011 Cheers. I've got an m50b25 block all ready. The bores are borderline ok for the pistons I currently have. Quote Share this post Link to post Share on other sites
polley 916 Report post Posted October 10, 2011 Cheers. I've got an m50b25 block all ready. The bores are borderline ok for the pistons I currently have. I have a M50B25 block (non vanos), you're welcome to measure it to see if it would suit your pistons. Quote Share this post Link to post Share on other sites
