A show on Motortrend called Engine Masters just did an episode testing the oil pressure and power of different stages of oil pumps for a GM LS engine. For an engine making
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I remember that, the How to hot rod small block and big block Chevrolet engines books in the early 1970's would say the HV and HP oil pumps would take more HP to run and that the most of the savvy pro engine builders would keep the standard volume oil pumps.
It has to, but it isn't by much. So it's still a waste.Wow 150psi. That seems like a waste. Maybe that in turn heats the oil up faster?
The pressure curve on the gen 4 pump was weird.
Funny you mentioned those. I have them all as well as a few other books that are my bathroom reading material.I remember that, the How to hot rod small block and big block Chevrolet engines books in the early 1970's would say the HV and HP oil pumps would take more HP to run and that the most of the savvy pro engine builders would keep the standard volume oil pumps.
There was mention the other day about the current LSx having a vane pump, not a PD pump, but I could not find anything on that on the web when I briefly searched. Would that be a Gen V pump? Sorry, I don't keep track of GM's smallblock evolutions.
Excellent, thanks for the confirmation. Do we have any details on this pump? It seems like a bizarre detour on an engine family that has been GM's staple for over 20 years.The vane pump started with the Gen 5 LT1 engines.
Excellent, thanks for the confirmation. Do we have any details on this pump? It seems like a bizarre detour on an engine family that has been GM's staple for over 20 years.
The pressure relief bypass opened.
Engine Masters is awesome. I get it on my cable as channel 426 and record every epoisode. I have to catch up!
It's because the Gen V pumps are variable displacement. A vane pump is much easier to make variable displacement because you can slide the the core of the pump one way or another to change the displacement, thus pressure and drag.Excellent, thanks for the confirmation. Do we have any details on this pump? It seems like a bizarre detour on an engine family that has been GM's staple for over 20 years.