using high volume oil pump
#1
Senior Member
MASTER BUILDER
Thread Starter
Join Date: Mar 2008
Posts: 173
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
#2
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
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
#3
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
Curtis
#4
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
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.
Like i said varied opinions for sure.
Zip.
#9
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Originally Posted by kwkracing
Whats the difference in the 10555 pump?
Zip.
http://www.mellingselectperformance....nOilPumps.aspx