8 speed help

Hey guys,
Im currently building up a new/old roadie.
I have a shimano 8 speed rear hub/cassette and some campag chorus 8 shifters.
My question is can I use a campag rear derailleur with the shimano cassette or should I use a shimano derailleur?

I read that I can use a 9 speed shimano derailleur?

ps... I tried the search function but didnt really get anywhere.

Thanks!

These guys will sort you out.

http://jtekengineering.com/shiftmate.htm

Try it - depending on wear etc, you may get away with it. Set up from the middle of the cassette outwards.

If it's not good, you can re-space the casette - sheldon has the spacings in the table - Mavic do the correct spacers.

Have a read of this http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3946
I think you can only get six speed set up though.

Campag 8-speed cassette spacing is 5mm, shimano is 4.8mm, over the 7 shifts that's 1.4mm error. If you set it up so that it's correct in the middle if the cassette it'll be out by 0.7mm at top and bottom. Small enough to not really matter. Shimano top jockey wheels are built with a fair bit of slack in them so if you use one in your campagnolo mech it'll help absorb the error. I've got a bike with this setup, works really well. 95 Veloce groupset with shimano r-500 wheels, shimano hg-50 8-speed cassette.

There are lots of inexpensive campag 8-speed wheelsets around as 8-speed campag hubs are incompatible with 9,10,11. The problem is finding 8-speed cassettes. Shimano still make 8-speed stuff.

PS if you go 9-speed can I have your ergo levers?

I'm running shimano 7 speed downtube shifters (fitted to bar-end housings on tri-bars) with a campag 8-speed block (the levers have a 'spare' click to make it up to 8!). Works fine!