[Supras] Oil accumulator vs. pumping air

berniek at technicaldevelop.com berniek at technicaldevelop.com
Fri Dec 7 20:19:46 CST 2007


Thinking of adding an oil accumulator (1-1/2 to 3 qt.) to protect 
against starvation during high speed stops and cornering at the limit.  
I've already relocated the pickup as far back in the pan as it will fit, 
necessitating cutting back the baffle.  The baffle angle was so shallow 
that from all appearances, oil would not flow back to the pickup under 
hard acceleration.  So under acceleration, I should be OK.  Its pulling 
the speed down from over 3 figures in MPH and cornering that I'm trying 
to address.  I've had instances in the past where cornering with another 
car ran the oil up the side of the pan, evidenced by hydraulic lifters 
getting noisy suddenly. 


The question is this:  Since, the oil pump is in good condition and will 
have oil wetted gears, what is to keep it from pumping air at 60-70 PSI 
during conditions at high engine speed when it becomes uncovered?  Under 
those conditions, the accumulator will not be of any value.  Yes, air is 
compressible, but it can also be pumped by a positive displacement pump 
in good condition (i.e., the sump oil pump). 


Really looking forward to answers to this one.  Thanks.


Bernie



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