I found my error. The --exclude option, need path without '/' on the end.
> tar --acls --append --exclude /home/web/current/temp -vf
/data/save/save.tar /home/web/current/ >> /data/save/sauve.log
tar --acls --append -vf /data/save/save.tar /home/web/current --exclude
/home/web/current/temp >> /data/save/save.log
Thanks all for your help.
Guillaume