using high volume oil pump

Old 02-24-2010, 10:57 AM
  #1  
chevyart
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Default using high volume oil pump

what are pros and cons of using a high volume oil pump i SBC race engine. i have always heard drag racers they dont like them because it may suck the pan dry under certain conditions. would really like some comments on this topic as i am getting ready for oil pump install in a new engine. any comments on high pressure oil pumps? chevy art
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Old 02-24-2010, 01:36 PM
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oldandtired
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You mentioned high volumn and high pressure. Different animals...

I run a standard volumn BBC pump on the small block (special length oil pump drive required). Gives plenty of volumn and resonable pressure.
JMO. Dave
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Old 02-24-2010, 02:36 PM
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curtisreed
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I have never seen the need to run a high volume pump on a SBC in a naturally aspirated engine. Unless you are running huge clearances I believe the standard volume pump is plenty. Running a higher volume pump would just bypass more oil and use up more horsepower to run. Pressure is completely different. I do change the spring to have more pressure than what a stock pump has. Usually around 65-70lbs hot pressure at speed. Just my unqualified opinion.

Curtis
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Old 02-24-2010, 03:02 PM
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zipper06
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Man that's a good question and i'll bet the answers will come in all kinds of different opinions. i personally run high volume pumps but i also run .0025/.003 clearance rods and mains. I use the stabndard spring (42 lbs) with 20/50 oil. It will maintain 40/50 lbs at rpm, but idles around 20/25 lbs. hot. I haven't run one yet but i like the B/BLK pump with the 3/4" pickup. The problem with high pressure is that it robs a lot of HP, causes cam distortion, wears distributor gears, and causes irratic distributor timing. If i could i'd have 25 lbs. pressure crossing the finish line or go dry sump. I do run a front distributor drive on the blower motor.

Like i said varied opinions for sure.

Zip.
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Old 02-24-2010, 11:53 PM
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cepx111
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HV77 here, stock spring.
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Old 02-25-2010, 05:51 AM
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curtisreed
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Zip, you are right it seems there are always more ways than one to skin a cat. Many people develope there combination over the years and no particular way is always best.

Curtis
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Old 02-26-2010, 09:29 PM
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cncmotorsports
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Use Melling 10550

Reeving over 7500 use 10550c

Nasty engine use 10990c over 8000 rpm, change spring to low pressure spring.
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Old 02-28-2010, 10:17 PM
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kwkracing
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Whats the difference in the 10555 pump?
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Old 02-28-2010, 10:37 PM
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zipper06
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Originally Posted by kwkracing
Whats the difference in the 10555 pump?
Here you Go,

Zip.

http://www.mellingselectperformance....nOilPumps.aspx
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Old 03-01-2010, 12:26 AM
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Tod74
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I use a high volume but I did it because my clearances are .003 on the rods and .003- .0035 on the mains.
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