while I'm a bit hesitant to fully agree with
substituting a garden hose water flow,
into the engine,as a coolant supply,
for the use of a radiator on an engine test stand,
the idea has some areas of merit worth looking at, and just to be a bit clearer,
Ive generally advised using a garden hose and its water flow pouring over the outer surface,
of a radiator on the test stand to further speed cooling of the pressurized coolant in that radiator,
and
running a test stand outside in the drive way vs inside the shop,
JUST in case something goes unexpectedly wrong...
especially if it could even remotely involve fire from leaking pressurized fuel!
for what should be all to obvious reasons
simply because if you have a grasp on the potential risks,
youll want to limit your potential losses.
(and having a fire extinguisher readily at hand,
and not having the engine or car starting up under questionable conditions,
in a confined space attached to your shop or home,
makes a good deal of sense)
http://garage.grumpysperformance.co...-fire-extinguisher-handy.81/page-2#post-42551