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Pressure at Startup |
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Someassemblyrqd 
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Joined: Jul/02/2012 Location: Renton, wa Status: Offline Points: 458 |
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 Topic: Pressure at StartupPosted: Jun/22/2020 at 6:25pm |
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I have 75 lbs at cold running, 75 lbs at freeway speeds, 30 lbs at warm idle
When I start the car it takes several seconds to bring up pressure. I’ve spent many dollars swapping between oil filters, currently running a NAPA Gold. What else can I investigate, where would the oil and oil pressure be going to? 500 miles on the engine, .904 lifters with no noise any time. Is this loss of oil at startup drain back, oil pump issue, ......? To get around starting with no oil I’ve been turning the engine over for a few seconds to avoid dry starts |
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Greg E.
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White70JavelinSST
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Posted: Jun/23/2020 at 9:43am |
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Cranking the engine to build pressure before turning on the
ignition is a good way to get some oil squirting into the oil
passageways. An Accusump is better. https://www.cantonracingproducts.com/categories/accusump-oil-accumulator.html The
delay between engine start and reading pressure at the gauge can be
caused by the small oil line and it's length going to the gauge. The
White70JavelinSST has that lag at the gauge. Rest assured that oil pump
is squirting oil everywhere in the engine even though the gauge reads
pressure slower.
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70 Javelin SST, second owner, purchased 1972
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Heavy 488
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Posted: Jun/23/2020 at 10:14am |
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Yup. That tiny oil line isn't sending a digital signal to the gauge.
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Hurst390
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Posted: Jun/23/2020 at 11:34am |
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You need to convert to a ford filter. Instant pressure at start-up.
Replace the filter nipple with Mopar Part 53007563AB. You can block the oem byplass with a 3/8 pipe plug. I don't thread the adapter for the plug, I just grind a little bit of thread off the plug and it fits the hole replacing the oem bypass valve assy. It doesn't have to be sealed up super tight.
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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Hurst390
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Posted: Jun/23/2020 at 11:42am |
I disagree, They are great for a pre-luber if you open it and shut it back off before you start the engine. Start the engine and let it run a bit and then I would open back up the accumulator. If you leave the valve open on start-up it is going to favor filling the accumulator until it is full,only then full volume will be given to the engine. I ran one for 5 years and see no need for it in any of my racing,drag or circle track. He just needs a ford oil filter.
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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Heavy 488
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Posted: Jun/23/2020 at 1:47pm |
Did just that about 20 years.ago.
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Someassemblyrqd
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Posted: Jun/23/2020 at 2:21pm |
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And the Motorcraft filter number that fits the Mar nipple is?
The bypass is blocked.
I’ll give it a try. Will let you know. Thx. Greg |
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Greg E.
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Trader
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Posted: Jun/23/2020 at 2:24pm |
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Ford FL1A filter.
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Heavy 488
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Posted: Jun/23/2020 at 2:25pm |
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The long filter Motorcraft FL1A Wix long 51515 or 51515XP
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Someassemblyrqd
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Posted: Jun/23/2020 at 4:07pm |
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Thanks Alberto
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Greg E.
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White70JavelinSST wrote: