Quote:
Originally Posted by retyler
So if what some of you state about HV pumps is true then you should not see any increase in oil pressure on the gage with a HV normal pressure pump verses a standard pump.
|
Right.
About any pump can make an engine live while idling. Super low pressure super low volume. What happens when you rev it up? Needs more volume and needs more pressure. A HV pump is nothing special - somebody already posted that if the bearings are tight the extra flow just goes back to the pan. But, at high rpm's the extra flow may just save your engine when it gets into a marginal situation.
Cheap insurance. Some buy it, some don't.
In the '80's low volume low pressure pumps were on all engines from the factory. Many (many!!) engines died as a result of that decision to save 0.0001 mpg. My (ahem) Chevy Duramax runs 90 psi and is expected to go 250,000 to 500,000 miles (with a few already over 500k on original rings and bearings). I wonder why they are now using higher volume and higher pressure oil pumps? Could it be we expect engines to last 200-400K miles?
jb
jb
