I got a pdf of one - a scanned and text recongised copy, of the workshop manual. Covers A12, A14, A15. It's 30Mb or so - I can't just send it to anyone....but if someone has a website that can host it I can ftp it to them.
TnPShow used to host it...I see he's removed all his Datsun stuff from his site though, someone else was hosting it before them, I've forgot who that was.
I might check what I'll be paying for a system from the extractors back....if it's not too much I just go 2" and be done with it, if it's more than a few hundred I'll get into some standard obsessive research on the topic.
Sounds like around 2" if going to be about right anyway - I'll gradually improve the output of this engine from it's currently stock state so a bit of expandability might be a good thing.
Cool I was thinking 2", I can't imagine that picking an exhaust too big will effect engine performance by much at all.
I can see how a bigger exhaust will result in a slower exhaust gas velocity and the oppuunity to cool more - but don't really understand how much impact that would make.....unless anyone knows better?