Bracket Talk
So - how much oil pressure?
August 13, 2019, 11:43 AM
chasracerSo - how much oil pressure?
Just reading another post here about someone looking for a oil pump pressure spring.
100 pounds, 90 pounds, 70 pounds, all kinds of numbers....so what is the general consensus on oil pressure for a 1000 hp BBC?
August 13, 2019, 12:13 PM
WHOMPWHOMP55 to 60
August 13, 2019, 01:19 PM
RyanNorton1What weight oil? NA or Nitrous/Blower? Peak RPM?
Dry Sump? Vacuum pump? What pan vacuum?
Bracket or max effort?
Anything above 60-70 is probably fine, but to really narrow it down all of the above will come into play.
August 13, 2019, 02:11 PM
chasracerJust a typical bracket motor, NA, wet sump, vacuum pump, normally a 15w50. Like to stay under 7200-7300.
August 13, 2019, 03:11 PM
TOP38The 10 PSI per 1000 RPMs is OK, its a bit conservative side though. A little more than needed won't hurt.
August 14, 2019, 10:57 AM
ski_dwn_itMy 555 with castrol20w50 spun to 7450 has 48psi.
Has for 3 years now and bearing look like new. No synthetic oil. Oil changed about every 50 runs.
Runs 9.0 at 153. In 3550lb car.
Don't need with what is working. Pressures steady on racepak.
Not sure if the above is good or bad. Just reference for ya.
Configuration: 3350#, 582 C.I.,
60 - 1.24
1/8 - 5.53@ 126MPH
1/4 - 8.73@ 159MPH
3700#+210lb driver, FULL interior, through mufflers, 10.5 tire.
60'-1.333 (IN 4000ft DA! Joisy Math excluded; 1.25sec using JOISY MATH.) 
1/4 - 9.60@144MPH August 14, 2019, 05:46 PM
RPROGAS582 using 20W-40 during the summer (80 to 110 degrees) months it carries 55-65, in the winter (40 to 60 degrees) I use 10W-30 and it still holds 55-65.
I was advised that with bushed lifters to stay away from using a heavy weigh oil during the winter months, like 50 weight, (unless you use a pan heater) the bushings don't get enough initial lubrication. Needle bearing lifters can tolerate the heavier oil.
Bob
August 14, 2019, 06:37 PM
Curly1Mine is small block but I usually run right around 55-60 psi and bearings always look perfect. The more pressure you run the more oil it will pump up on top and it also wastes a lot of energy and puts more stress on cam and distributor gear.
https://postimg.cc/gallery/np3zpruo/"Dunning-Kruger Effect"
-a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.
Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.
4X NE2 CHAMPION. 2020 TDRA NE2 Champion
August 14, 2019, 09:36 PM
rusty80 +,8000+,20/50 vr1
honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224
August 14, 2019, 10:07 PM
Curly1Also bearing clearances and weight of oil makes a difference in pressure required.
https://postimg.cc/gallery/np3zpruo/"Dunning-Kruger Effect"
-a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.
Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.
4X NE2 CHAMPION. 2020 TDRA NE2 Champion
August 16, 2019, 06:51 AM
NC3x58We have one motor that will go 55-65 all day, cold to hot lapping. Our other motor will go 45-65 all day, 65 first start and once it's warm it'll stay around 55-60 heading to the lanes and come back from a pass around 45. These are two completely different combinations though, block, head etc. Both using VR1 20w-50
Nick Craig
1971 Camaro Split Bumper
376ci LS3
August 16, 2019, 09:52 AM
CURTIS REEDI know this thread is about oil pressure but I ran on to this recently and thought some here might find some value in it.
____________________________
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August 16, 2019, 04:09 PM
WooleyVery interesting chart. Where did you find this?
August 16, 2019, 04:46 PM
Buckyquote:
Originally posted by Curly1:
Mine is small block but I usually run right around 55-60 psi and bearings always look perfect. The more pressure you run the more oil it will pump up on top and it also wastes a lot of energy and puts more stress on cam and distributor gear.
Me too.
Foxtrot Juliet Bravo
August 16, 2019, 09:08 PM
CURTIS REEDquote:
Originally posted by Wooley:
Very interesting chart. Where did you find this?
There is a guy over on Yellowbullet that has an oil engineering background that posted it.
____________________________
2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion
2018 Div4 Goodguys Hammer award winner