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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

Ed Wright 02-17-2014 05:22 PM
Re: low volume oil pump
 
.0021" for the rods, .0025" for the mains. I never run more than that. Being an SS engine, why large journals?

Monte Howard 02-17-2014 11:07 PM
Re: low volume oil pump
 
It will be fine, but I wouldn't be running 15w40.

Ed McLawhorn Jr. 02-18-2014 11:10 AM
Re: low volume oil pump
 
Quote:
Originally Posted by Monte Howard (Post 421082)
It will be fine, but I wouldn't be running 15w40.
So, what would you run in this application?

Ed

Ed Wright 02-18-2014 01:22 PM
Re: low volume oil pump
 
It would be fine with 10W30 and a standard oil pump. I probably would not put Royal Purple 0W10 oil in it.

Mike Pearson 02-18-2014 04:02 PM
Re: low volume oil pump
 
I like the Valvoline 10-30 synthetic racing oil for regular use

Ed Wright 02-18-2014 09:21 PM
Re: low volume oil pump
 
Quote:
Originally Posted by Mike Pearson (Post 421153)
I like the Valvoline 10-30 synthetic racing oil for regular use
I run their non-synthetic race 10W30 in "bracket mode." The black bottle that says. "Not legal for street use!"

Weekend Racer 02-18-2014 10:42 PM
Re: low volume oil pump
 
Thank! everybody for your comment ,advise etc... . Class Racer it`s Racer of class too!

Micha5tr 02-20-2014 03:16 AM
Re: low volume oil pump
 
What is your clearance on the rodshttp://www.bettecets.com/4.jpg

Weekend Racer 02-20-2014 07:17 AM
Re: low volume oil pump
 
rod clearance .0026. side clearance .0014

Weekend Racer 02-20-2014 07:19 AM
Re: low volume oil pump
 
Oup! you should read .014 side clearance.


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