Re: 440 oil pressure to high
[Re: dave571]
#448284
08/25/09 09:33 AM
08/25/09 09:33 AM
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Joined: Jan 2003
Posts: 21,059
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,059
Niles , Ohio
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Hi volume pumps more oil.Hi pressure adds pressure.My 440 runs 85 cold and proballt 65 hot.Its been like that for at least 10 years.I run hi volume hi pressure.My kids old OE 413 runs 65 cold and 55 hot.His has been like that for 12 years.Rocky
Chrysler Firepower
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Re: 440 oil pressure to high
[Re: therocks]
#448285
08/25/09 02:30 PM
08/25/09 02:30 PM
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Joined: Jan 2003
Posts: 3,031
Erda, UT
67Charger
master
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master
Joined: Jan 2003
Posts: 3,031
Erda, UT
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High volume will simply put you against the bypass sooner. The bypass sets the max pressure. Milodon makes and adjustable unit that works very well.
11.33 @ 118.46 on motor
10.75 @ 125.35 w/ a little spray
Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race
Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023
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Re: 440 oil pressure to high
[Re: therocks]
#448286
08/25/09 02:51 PM
08/25/09 02:51 PM
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Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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Quote:
Hi volume pumps more oil.
Yes. and more oil through the same clearance means more pressure. That's why a HV pump improves pressure in old engines.
As mentioned, the spring is what decides the pressure. but ONLY if the pump is capable of moving enough oil to reach the spring pressure.
From my own experience, a HV pump is nothing but a waste on a fresh motor. I had a the relief stick on std pump once. It moved enough oil at just off idle, that it blew the filter up like a balloon. All this, on a motor with .003 main clearance.
I reringed a 400 a few years back, and had teh same issues as the original poster while using an hv pump. Switched to standard, no problems since.
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Re: 440 oil pressure to high
[Re: dave571]
#448287
08/25/09 03:07 PM
08/25/09 03:07 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
had the same issues as the original poster while using an hv pump. Switched to standard, no problems since.
The OP has no problem.
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Re: 440 oil pressure to high
[Re: dave571]
#448288
08/25/09 03:26 PM
08/25/09 03:26 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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My stock rebuild with stock pump and higher pressure spring put out 80 psi cold at idle but would drop to 65-70 warm. No biggie.
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Re: 440 oil pressure to high
#448289
08/25/09 03:40 PM
08/25/09 03:40 PM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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what bearings are you running in that brand new 440? OEM style half groove bearings? then yea, standard pump is all you need.
but if you're running full groove bearings that oil the journals all the time instead of just half the time, then an HV would help you out.
my big block is running an HV, and it sees 75psi cold at start up, but warm idle it's around 30. at cruise it's 65.
**Photobucket sucks**
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