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-   -   low volume oil pump (https://classracer.com/classforum/showthread.php?t=51850)

Weekend Racer 02-15-2014 07:45 PM
low volume oil pump
 
I plan to use schumann low volume ,low pressure oïl pump in my chevy 350 SS/HA.The main bearing clearance are at .0029 +/1 .0001
. What oïl pressure I can expect?.
Thank!

Alan Roehrich 02-15-2014 07:56 PM
Re: low volume oil pump
 
So, you're running a -10% volume pump and what amounts to 0.003" on the mains? What is your clearance on the rods? What oil?

Weekend Racer 02-15-2014 09:37 PM
Re: low volume oil pump
 
Sorry,you should read main bearing clearance are at .0029 +/- .0001. The rod clearance are at .0026. +/- .0001. The rod side clearance are at .014. 15W 40 oïl .
Thank!

Ed Wright 02-15-2014 09:48 PM
Re: low volume oil pump
 
That's a lot of oil clearance for a low volume pump, isn't it?
Which rod journals?

Weekend Racer 02-15-2014 10:09 PM
Re: low volume oil pump
 
rod journal are at 2.0995

carl hinkson 02-15-2014 10:29 PM
Re: low volume oil pump
 
Quote:
Originally Posted by Weekend Racer (Post 420813)
rod journal are at 2.0995
What are you using to come up with that clearance?

Alan Roehrich 02-15-2014 11:10 PM
Re: low volume oil pump
 
Quote:
Originally Posted by Weekend Racer (Post 420810)
Sorry,you should read main bearing clearance are at .0029 +/- .0001. The rod clearance are at .0026. +/- .0001. The rod side clearance are at .014. 15W 40 oïl .
Thank!
So, for all intents and purposes, that's about 0.003" on the mains, and 0.0025" on the rods.

Too much clearance for a -10% volume pump. And 15W40 is not really a good oil choice, either. You'll have about 10 psi hot at an idle of 800 RPM. And maybe 50 psi at 6000-7000 RPM.

Weekend Racer 02-15-2014 11:11 PM
Re: low volume oil pump
 
Block is dart shp pro block, Crank is Gm 1184, rod are crower ml 93005.

Ed Wright 02-16-2014 10:07 AM
Re: low volume oil pump
 
Quote:
Originally Posted by Alan Roehrich (Post 420818)
So, for all intents and purposes, that's about 0.003" on the mains, and 0.0025" on the rods.

Too much clearance for a -10% volume pump. And 15W40 is not really a good oil choice, either. You'll have about 10 psi hot at an idle of 800 RPM. And maybe 50 psi at 6000-7000 RPM.
I think that is too much period.

Jim Hanig 02-17-2014 12:56 PM
Re: low volume oil pump
 
Quote:
Originally Posted by Ed Wright (Post 420844)
I think that is too much period.
Ed what would you have for rod $main clearance


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