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Re: do mopars just get low oil psi or is it just mine?
[Re: MoparforLife]
#671463
04/16/10 02:21 PM
04/16/10 02:21 PM
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Joined: Jan 2003
Posts: 21,067
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: 21,067
Niles , Ohio
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My old 318 had 280K and at idle hot had like 10 psi.Ran for 4 years till I sold it and was running good after at least 3 more years that I know of.My 440 hi press hi vol pump has 80 cold and never drops below 65.My kis 62 413 carries 60 cold and minimum 45 hot.Rocky
Chrysler Firepower
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Re: do mopars just get low oil psi or is it just mine?
[Re: stumpy]
#671464
04/16/10 03:32 PM
04/16/10 03:32 PM
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Joined: Aug 2003
Posts: 2,682
Clinton Twp. Michigan
coronet1966d
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,682
Clinton Twp. Michigan
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Quote:
What oil gauge, what temp and what idle speed?
its an autometer short sweep electric 0-100psi
temp at idle is about 150 but it gets as high as 180
idle speed is about 1000
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Re: do mopars just get low oil psi or is it just mine?
[Re: radar]
#671465
04/16/10 03:36 PM
04/16/10 03:36 PM
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Joined: Aug 2003
Posts: 2,682
Clinton Twp. Michigan
coronet1966d
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,682
Clinton Twp. Michigan
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Quote:
My fresh build (small block) had a high volume pump. I seized it with a small piece of trash that got sucked in. I replaced it with a melling standard flow. My gauge still reads 10-15 at idle (900 rpm) and stays at or above 10psi per 1000rpm.
Gotta be loose bearing clearances? I also run the purple 10w30 synthetic.
yours sounds exactly like mine. (minus the seized oil pump part) this is a tight fresh engine with no more than 40 miles on it. a machineist did the lower end i assembled the rest
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Re: do mopars just get low oil psi or is it just mine?
[Re: 5spdcuda]
#671474
04/16/10 05:46 PM
04/16/10 05:46 PM
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Joined: Aug 2003
Posts: 2,682
Clinton Twp. Michigan
coronet1966d
OP
master
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OP
master
Joined: Aug 2003
Posts: 2,682
Clinton Twp. Michigan
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Quote:
Clearances are probably on the loose side. Also high volume isn't the same as high pressure. I use a high pressure spring in any modified engine. With 20-50 weight oil my cold pressure is 75-80 psi. Hot idle is 40 psi, 30 psi if it's been run hard. Hot pressure at 2000 rpm is 60-65 psi. Pressure is 5 psi lower when using thinner oils. Most stock Mopars run 45-50 psi at 2000 rpm hot and anything from 15-30 psi at hot idle.
where can i get a high pressure spring?
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Re: do mopars just get low oil psi or is it just mine?
[Re: Hoof Hearted]
#671477
04/16/10 09:03 PM
04/16/10 09:03 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
Quote:
Corny ... it sound like you have a L O S S E L Y clearanced motor.
I'm guessing he meant L O O S E L Y 
but I agree.
Oooooops !
...and me thimks your machinist needs to go back to FIRST GRADE !
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Re: do mopars just get low oil psi or is it just mine?
[Re: dOrk !]
#671478
04/16/10 09:19 PM
04/16/10 09:19 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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I beg to differ here electric guages just show its working some and IMO are not a reliable as a mech guage I had the same thing till I went back to the mech autometer gauge i say put a mech on and check it first before working on something thats not broke my sb 318 holds 25 hot idle in gear at 850rpms 75 at 2500rpms almost 250,000 miles on it my BB used engine 75,000 miles was low pessure on elect gauge and flickerd the stock oil light in the dash swaped to the mech gauge now its up around 70 hot and 30 at hot idle sender was going bad maybe,it would be at 30lbs on mech gauge and flicking the oil light on the elect gauge compairing the 2 at the same time cant believe all you have in that 440 and its on the loose side  did you do any oil mods? full groove bearings? did you get your seal fixed? how was the lifter bores?? in spec on the bore size? IMO,I would double check with mech gauge first move to see if the gauge is correct result will vary by gauge,IMHO 
Last edited by scratchnfotraction; 04/16/10 09:21 PM.
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Re: do mopars just get low oil psi or is it just mine?
[Re: 5spdcuda]
#671479
04/17/10 03:06 AM
04/17/10 03:06 AM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Clearances are probably on the loose side. Also high volume isn't the same as high pressure. I use a high pressure spring in any modified engine. With 20-50 weight oil my cold pressure is 75-80 psi. Hot idle is 40 psi, 30 psi if it's been run hard. Hot pressure at 2000 rpm is 60-65 psi. Pressure is 5 psi lower when using thinner oils. Most stock Mopars run 45-50 psi at 2000 rpm hot and anything from 15-30 psi at hot idle.
My tired stock bearing/crank 440 ran 75-80psi cold with 15 or so at a 700rpm idle in gear. Any amount of throttle and the oil pressure would shoot right up, and that's with an original pump/spring pushing 10w-30 oil. Your HP spring and thicker oil doesn't seem to develop any more pressure than my tired stocker did. I later tried putting in a HV pump, and saw a small increase in pressure at idle, 5psi or so, with the biggest difference being it built a lot more pressure quickly with any amount of throttle.
You can't have pressure without volume. A high pressure relief spring will do nothing for the OP. All a high pressure spring does is raise the upper limit of oil pressure you will develop before the relief pops, and trust me, the relief is a hell of a lot higher than 8psi. What you need is more volume, and if you're already running the HV pump, about the only thing you can try is a thicker oil.
You can try the stiffer spring if you want, however I would bet it will gain you nothing.
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Re: do mopars just get low oil psi or is it just mine?
[Re: Supercuda]
#671483
04/17/10 11:33 AM
04/17/10 11:33 AM
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Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
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Quote:
Quote:
where can i get a high pressure spring?
Won't help you.
The high pressure spring sets the MAXIMUM oil pressure. It will not raise you lower oil pressure at idle.
The only caveat is if the pressure relief valve is sticky, taking it apart to install a new spring might loosen it up and get it working. But it won't be the spring that fixed it. There was a batch of oil pumps a few years back that had this problem and I think it was Melling pumps too.
Exactly. A High pressure spring aint gonna help one iota. Its only goning to keep the relief valve from opening until a higher pressure is reached at speed. At lower pressures the regular spring is keep the valve closed just fine.
The pump itself could have excessive clearannce between the rotor and the case. Considering the low cost and ease of replacement on a BB you might want to try a different HV pump, or machine down the case clearance on this one.
But in all probability it is a loose motor. You could drop the pan and plastigage the bearing clearances...
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