Oil Pressure
04-13-2007, 09:15 AM
#1
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Join Date: Jan 1999
Location: Pembroke Pines, FL
Posts: 129
Oil Pressure
I need some input on this problem, I have searched and found no answer.
My problem is when I start the car cold, I have good oil pressure around 60psi, car warms up oil pressure drops to around 18-20psi idle and 40-42 cruse. This is the funny part, if I accel under heavy load, 6 gear under 2000rpms, the oil pressure drops from 40 to 30 psi, if I let off the gas it pops up again. This only happens under heavy load 5 and 6 gears under 2000 rpm.
About the motor, 350 board .020, balanced and blueprinted, stock oil pump with white spring, cc306 cam, REV valve springs, crane lifters, pro-mag rockers
My problem is when I start the car cold, I have good oil pressure around 60psi, car warms up oil pressure drops to around 18-20psi idle and 40-42 cruse. This is the funny part, if I accel under heavy load, 6 gear under 2000rpms, the oil pressure drops from 40 to 30 psi, if I let off the gas it pops up again. This only happens under heavy load 5 and 6 gears under 2000 rpm.
About the motor, 350 board .020, balanced and blueprinted, stock oil pump with white spring, cc306 cam, REV valve springs, crane lifters, pro-mag rockers
04-13-2007, 09:25 AM
#2
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Join Date: Aug 2005
Location: Hutchinson,KS
Posts: 178
my car did something similar a couple times. i had used lucas stabilizer in my oil and the cruise oil pressure was around 45psi. after about 1k miles the cruise pressure was 35psi but when i went to pass someone the pressure would dip until i let off the gas then it went back up. changed the oil back to straight 10w-30 mobil 1 oil pressure back to normal.
does this only happen under 2k or in any other gears?
does this only happen under 2k or in any other gears?
04-13-2007, 10:08 AM
#3
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Join Date: Jan 1999
Location: Pembroke Pines, FL
Posts: 129
Seems to only happen under 2000 rpms, but only notice it in upper gears. If you accel in 1 - 4 gears the rpms come up quick, 5 and 6th dont, so the oil pressure drops. But the same thing happens, if I let off the throttle, oil pressure goes up.
04-13-2007, 10:12 AM
#4
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Join Date: Jan 1999
Location: Pembroke Pines, FL
Posts: 129
I also changed my oil from 15-50 to 10-30, and removed my oil cooler, though it was clogged. Cut my oil fliter open, no gold or sliver flakes. Car does not overheat, has lots of power
04-13-2007, 02:38 PM
#7
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Join Date: Nov 2000
Location: Ft. Worth, TX
Posts: 1,937
Yep, don't worry too much about it if you have 10psi per 1k rpm... mine has similar pressure to yours..20psi or so at idle, 40psi at cruise...been that way for years. I have 95k miles on the bottom end.
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