Re: Low Oil Pressure
[Re: Stroker Scamp]
#2575349
11/07/18 03:10 PM
11/07/18 03:10 PM
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crabman173
Unregistered
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crabman173
Unregistered
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Kink in oil pressure line? While doing the headers? Copper or nylon easy to damage
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Re: Low Oil Pressure
[Re: Anonymous]
#2696378
09/11/19 01:13 AM
09/11/19 01:13 AM
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Joined: Nov 2004
Posts: 3,519 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,519
pacific northwest
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Part of the problem was a bad battery not spinning the engine as fast, oil pressure is good now with the new filter and new oil I think might have had a stuck bypass? but we are all good now, just need to reset the valves. Hope this helps someone down the road
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2734249
01/18/20 04:35 PM
01/18/20 04:35 PM
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Joined: Nov 2004
Posts: 3,519 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,519
pacific northwest
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Want to update on this, still not happy with how long it takes to build pressure. it takes over 30-40 seconds of cranking. It does build up but not like it use to. So pulled the pan and took the pump out, opened the pump and it was clean inside relief valve moves freely I can see oil up on the cam and pistons. So I have pressure but why so long to build after no internal changes? Thoughts and Thanks
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: johnzgarage]
#2735390
01/21/20 07:44 PM
01/21/20 07:44 PM
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Joined: Aug 2003
Posts: 43,744 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,744
Bend,OR USA
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Have you split open a oil filter? I have years ago(1973 or 1974) on the first Hemi stocker we where racing in NHRA stock, 50W Valvoline oil and 20F outside air temp breaking in the cam in the drive way at 2000 RPM, bang it split down the center, what a mess As far as oil filters and bypassing, I like my motors to get clean oil, not with larger particle in it due to the filter bypassing 40% cold oil
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2735400
01/21/20 08:18 PM
01/21/20 08:18 PM
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Joined: Nov 2004
Posts: 3,519 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,519
pacific northwest
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Want to update on this, still not happy with how long it takes to build pressure. it takes over 30-40 seconds of cranking. It does build up but not like it use to. So pulled the pan and took the pump out, opened the pump and it was clean inside relief valve moves freely I can see oil up on the cam and pistons. So I have pressure but why so long to build after no internal changes? Thoughts and Thanks When installing the new hedders I had to raise the motor and looks like I dented the pan enough to have the pickup make a witness mark on the bottom of the pan. Also had a thick layer of brown sludge where the pick up sits (oil is Clean). Cleaned the pan and ready to put back together I hop it was just a combo of those 2. No clue what the sludge was, not abrasive and no metal and yes I bent the pan back
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Cab_Burge]
#2735402
01/21/20 08:22 PM
01/21/20 08:22 PM
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Joined: Feb 2005
Posts: 4,333 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,333
Prospect, PA
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Have you split open a oil filter? I As far as oil filters and bypassing, I like my motors to get clean oil, not with larger particle in it due to the filter bypassing 40% cold oil How do you measure the bypass quantity?
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Re: Low Oil Pressure
[Re: BSB67]
#2735484
01/22/20 02:37 AM
01/22/20 02:37 AM
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Joined: Aug 2003
Posts: 43,744 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,744
Bend,OR USA
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Have you split open a oil filter? I As far as oil filters and bypassing, I like my motors to get clean oil, not with larger particle in it due to the filter bypassing 40% cold oil How do you measure the bypass quantity? Wix has stated that their race filters with internal bypass bypass 200 % more(40% vs,20% than the stock filters do, they have also stated that their stock bypass filter can bypass up to 20 % with cold oil at the lower air temps, below 40F. No rumors or I think I heard kind of information from me!
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Low Oil Pressure
[Re: Cab_Burge]
#2735496
01/22/20 07:52 AM
01/22/20 07:52 AM
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Joined: Feb 2005
Posts: 4,333 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,333
Prospect, PA
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Have you split open a oil filter? I As far as oil filters and bypassing, I like my motors to get clean oil, not with larger particle in it due to the filter bypassing 40% cold oil How do you measure the bypass quantity? Wix has stated that their race filters with internal bypass bypass 200 % more(40% vs,20% than the stock filters do, they have also stated that their stock bypass filter can bypass up to 20 % with cold oil at the lower air temps, below 40F. No rumors or I think I heard kind of information from me! Ok. You're not actually measuring, just using supplier literature. So the literature is saying that the valve is twice as big, so it can theoretically bypass twice as much. But in reality, it will only bypass the amount needed to control/balance the pressure differential dictated by the bypass relief. You will not actually know if, when, or how much oil is bypassed. Arguably, another good reason to not use a high volume oil pump and high viscosity oil.
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Re: Low Oil Pressure
[Re: Wirenut]
#2735812
01/23/20 12:05 PM
01/23/20 12:05 PM
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Joined: Feb 2014
Posts: 1,737 central il.
second 70
top fuel
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top fuel
Joined: Feb 2014
Posts: 1,737
central il.
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I had a similar evasive pressure problem. Car would have pressure then lose it. Prime it with a drill and great pressure. Long story short it was a cracked pickup tube that finally broke off at the block (rb motor) Same here except a hemi. Car would prime fine cold with a full pan of oil and be fine for quit awhile and hold 75psi until enough oil stayed in the top of the engine to get level below crack and would lose it's prime when the rpms were reduced.
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