Re: 250lbs of oil pressure, imposible?
[Re: DrCharles]
#2819996
09/12/20 02:45 PM
09/12/20 02:45 PM
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Joined: May 2003
Posts: 6,560 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,560
Downtown Roebuck Ont
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Absolutely possible. I would think it would need more shim than that but Buddy of mine built a 440 many moons ago that only made 5 psi so he shimmed the pump up nearly solid. Still 5 psi. Discovered he forgot to put a plug back in and fixed it. Didn't take the shims out of the pump... Fired it up and the Lee Eliminator oil filter came out from under the front of the car like a rocket with 7 quarts of Valvoline Racing 50 right behind it. He said it instantly pinned the Stewart Warner gauge. Kevin
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Re: 250lbs of oil pressure, imposible?
[Re: Twostick]
#2820009
09/12/20 03:59 PM
09/12/20 03:59 PM
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Joined: Jan 2003
Posts: 14,492 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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I doubt I’d believe it unless it happened to me........ but I had a metal shaving get caught in the relief valve in my 340....... stuck totally closed. 125psi hot idle, 275psi at rpm.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 250lbs of oil pressure, imposible?
[Re: dvw]
#2820015
09/12/20 04:53 PM
09/12/20 04:53 PM
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Joined: Aug 2003
Posts: 43,110 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,110
Bend,OR USA
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I've had the luck to buy at least three new Seal Power, maybe they where Speed Pro brand standard, maybe high volume, to many years ago to remember now, oil pumps that had the solid sided 440 bypass valve in them instead of the SB one with the holes in the sides Let us know what you find to fix it I drill a small hole in the cup and then a #8 sheet metal screw in that hole to pull the cup to find out if it was stuck and learned that they had the wrong valve in them from the factory
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 250lbs of oil pressure, imposible?
[Re: dvw]
#2820045
09/12/20 06:42 PM
09/12/20 06:42 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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I would guess 250 would expel all the gallery plugs.
Boffin Emeritus
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Re: 250lbs of oil pressure, imposible?
[Re: dvw]
#2820051
09/12/20 07:28 PM
09/12/20 07:28 PM
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Joined: Mar 2003
Posts: 9,099 Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
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My first 440 build would idle 75 hot and peg a 150psi guage. I ran the black mp filters to keep them from blowing off. I put at leak 5k hard miles on it like that. It never went over 6500 and i ran an extra quart for good measure.
250psi...I am impressed lol
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Re: 250lbs of oil pressure, imposible?
[Re: dvw]
#2820227
09/13/20 01:41 PM
09/13/20 01:41 PM
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Joined: Sep 2003
Posts: 19,320 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,320
north of coder
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I'm a dumb ass. I assembled this pump about 9 months age. Just looked at a google pic of a pump. The service manual pic sucks. I put the core plug in backwards. The plug in that position depressed the spring approximately 1/4" + .100" shim. The spring is tensioned about 3/8" deeper than the factory position. Been doing this stuff 40 + years and still find ways o make mistakes. Fortunately I'm still smart enough not to start it until the issue is resolved. Doug don't feel bad. i did the same thing on a 2.2 engine one time. those have the same pump relief spring as a small block. when i fired it up, the wix filter [the 51515 standard size] and almost all the oil got pumped onto the ground. not sure why i put the cup in backward, but i did, and i had a 1/4" shim with it, so a MESS it made. oil pressure gauge was pegged WAY past high.
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Re: 250lbs of oil pressure, imposible?
[Re: dvw]
#2820579
09/14/20 12:42 PM
09/14/20 12:42 PM
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Joined: Jan 2003
Posts: 17,840 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,840
S.E. Michigan
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Thank you for following up and closing the loop.
If for some reason anyone ever asks what will happen with a 3/8" shim, we know the answer to that question!
Rich H.
Esse Quam Videri
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Re: 250lbs of oil pressure, imposible?
[Re: ZIPPY]
#2820597
09/14/20 01:28 PM
09/14/20 01:28 PM
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Joined: Mar 2006
Posts: 9,822 MI, usa
dvw
OP
master
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OP
master
Joined: Mar 2006
Posts: 9,822
MI, usa
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1/2" Milwaukee. The part that surprised me is that the drill could possibly produce enough speed to provide enough volume to require the relief to even need to open. Doug
Last edited by dvw; 09/14/20 01:34 PM.
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