1.6 crossflow 681 v 711 whats the actuall difference please i have also seen for sale 1.3 with 711 block is this correct? regards martin p/s for those who run a 1.3 xfloe would be gratefull to hear your comments on driveability etc as a fellow locoster from this site has offered me a good one due to his upgrade

Rough summary (I haven't got my book handy)...

The 711 block is more rigid, and supports the crankshaft much better. Because of these changes it can survive more tuning.

David

yeah, from memory its a thicker block with better main bearing caps (stronger) and a couple of other bits stronger. I was under the impression though that the 711 is only really better if yuo intend boring it out, or are running big power.

cheers
Mark

I think this is what you need, pulled straight out of my favourites, an excellent article.

http://www.lotus-cortina.com/library/block/blocks.htm

BTW for the ultimate XFlow you want a South African Diesel block, mine is out to 1760cc with room to go a bit further yet!!!

Mac

Mac is that an 85mm bore?

cheers
Mark