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Old 10-06-2015, 04:40 PM   #25 (permalink)
oil pan 4
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Originally Posted by California98Civic View Post
Or an electromagnetic clutch for the pulley like most alternators have now. The ECU could just disengage the pulley under certain conditions, as it does a "smart" alternator. "Smart" pulley driven power steering pump is born. Could put such a pulley on an "on/off" switch too and ckntrol it from the dash. So you would only draw power from the engine at the low RPMs that oilpan is saying draw very little power. But his test was without turning the steering wheel, so wouldn't turning the wheel increase power draw somehow?
I was looking into those alternator clutches and most appear to be one way clutches and dampeners.
That way when the auto transmission shifts and the engine RPMs suddenly drop you don't have the alternator trying to push the belt.
Apparently this can make some kind of noise or shimmy.

As best I can tell when you use power assist to turn the wheel with the vehicle sitting still the pumps power consumption goes up to at least 1hp even at low engine speed.
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
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