Engine dyno for EFI project

[Brian Neill Tiedemann]

Hello all,
Reading the comments on dynos and setting them up, I thought of a couple 
of very large hydraulic pump/motors which I have... one is a gear pump, 
the other a 'gerola' type piston pump. Has anyone used hydraulics to make 
an engine dyno? Is high RPM a problem with hydraulic pumps? Any ideas for 
what kind of restriction would be appropriate for this type of application?

just thoughts..

cheers,
Brian.