they are checked & work ok
http://edj.net/2stroke/jennings/2stroke ... ndbook.pdf
takes a while to load but is ok
http://3cyl.com/mraxl/manuals/bell/perf ... m-bell.pdf
bell's bible!
slow to load but best if you save a copy then you can scroll at will.
http://www.mediafire.com/?w8em1enwwtcwwx8
pretty cool porting software, will work out port heights, spacers etc
http://www.mh-aerotools.de/airfoils/javapipe_en.htm
nifty little java app that will design a basic pipe from known timings.
and then print the cone templates for you
interesting in itself as you can just look at an off the shelf pipe & instantly know if it will work with your engine
http://www.kartingsa.com.au/private/Pipe_dsn.zip
and another pipe design prog, a bit more detailed this one
hope someone find these handy
