Re: big block oil pump question
[Re: gregcharger72]
#2643056
04/09/19 12:40 AM
04/09/19 12:40 AM
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Joined: Jan 2003
Posts: 31,200 Oregon
AndyF
I Win
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I Win
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Posts: 31,200
Oregon
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Update..... So, I took the hv pump off the engine I'm replacing , cleaned and inspected it , then put it on the new engine. Same drill motor, same oil,and the pressure is now is just over 60 psi. Thanks for your input, I appreciate it. Changing the pump in the car will be a PITA .I would have to lift the engine to remove it . Would be nice to resolve this issue with the engine out of the car. Yeah that doesn't surprise me. Sounds like you're leaking some oil inside the engine so you need the HV pump in order to build pressure. It could be the EDM lifters or it could be the lifter bores or it could be something else. You can find it if you take the time to look for it or just run the engine with the HV pump and see how it works.
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Re: big block oil pump question
[Re: gregcharger72]
#2643099
04/09/19 08:00 AM
04/09/19 08:00 AM
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Joined: Jan 2003
Posts: 18,025 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,025
S.E. Michigan
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Update..... So, I took the hv pump off the engine I'm replacing , cleaned and inspected it , then put it on the new engine. Same drill motor, same oil,and the pressure is now is just over 60 psi. Thanks for your input, I appreciate it. Changing the pump in the car will be a PITA .I would have to lift the engine to remove it . Would be nice to resolve this issue with the engine out of the car. That is good news. Do you prefer the number you got with the HV pump? If it were mine, I would prefer the bigger number. The only reason I have stuck with hv pumps is...more pressure at idle. Although I don't feel the engine "needs" it, it's a peace of mind thing. If you get a chance to prime it with the intake off, even years from now (let's say you decide to try a different manifold later or whatever), it might be interesting to see what's happening there. I've found not all lifters are the same size, many are smaller than they should be and they leak. Sometimes the leak is not 100% negative, for instance when you've got rollers oiled by splash it could be helpful.
Rich H.
Esse Quam Videri
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Re: big block oil pump question
[Re: ZIPPY]
#2643119
04/09/19 09:06 AM
04/09/19 09:06 AM
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Joined: Jul 2009
Posts: 123 pa
gregcharger72
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I,m better with 60 psi than 40 . I,m going to install the engine this weekend with the hv pump and see where I,m at with it when it gets hot. If the pressure is excessive I,ll change back to the standard pump. I,ll update the post with the results. Something i noticed when priming that i didn't give much thought to at the time was how much oil comes out of that tiny hole in the bottom of the lifter. This is the first time I've used EDM lifters. The car is a 72 charger , with the hv pump I have to lift up the engine about a half inch to get the pump to clear the k member.
Last edited by gregcharger72; 04/09/19 09:31 AM. Reason: add photo
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Re: big block oil pump question
[Re: gregcharger72]
#2643124
04/09/19 09:33 AM
04/09/19 09:33 AM
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Joined: Aug 2003
Posts: 4,744 On the parachute mount
n20mstr
master
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master
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Posts: 4,744
On the parachute mount
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HONESTLY.....you've got enough pressure to lube the engine. Start it and see what it has ?
BUT, my engine on a stand has 75lbs with a 3/8 drill. Its an Indy alum block. my lifters are hardlined from the back of the block and are pushrod oiling. I use a HV pump. Don't forget that you created another oil leak with the edm lifters. That's why id fire it and see. Plenty of engines are fine with the oil pressure you have. Also, you can switch to a heaiver weight oil, but id fire it first and see. Also im assuming you using a steel rod so I don't think it will go down that much when warm.
Sorry, now I see that all these things have been addressed....
Just want to add how good these Melling HV pumps are, ive been using the same one for almost 20 years now...and it was at BES and all they did was clean it and use it again !
Last edited by n20mstr; 04/09/19 09:47 AM.
....BAD A$$ STREET CAR.....
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Re: big block oil pump question
[Re: n20mstr]
#2643441
04/09/19 09:37 PM
04/09/19 09:37 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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master
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usa
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standard pump uses a 45psi relief spring. that driven stuff is pretty thin.
Last edited by lewtot184; 04/09/19 09:40 PM.
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Re: big block oil pump question
[Re: AndyF]
#2643530
04/10/19 08:05 AM
04/10/19 08:05 AM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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usa
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i have a spare engine on the stand that uses a stock pump and has 10-30 driven oil in it. it does about 50psi spinning the pump about 900rpm. this is with stock half groove mains and stock bearing clearances. I also have another stock 440 I drive and it does about 50psi with 10-30 rotella and 180f temps.
Last edited by lewtot184; 04/10/19 08:07 AM.
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Re: big block oil pump question
[Re: gregcharger72]
#2643580
04/10/19 10:13 AM
04/10/19 10:13 AM
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Joined: Jan 2003
Posts: 21,122 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: 21,122
Niles , Ohio
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A HV pump really dosent increase pressure That why its high volume.It just pumps more.Want more pressure get the spring kit.My 440 runs 60 minimum hot with HV HP spring.Been running since I put it in like 20 years ago.When my son had the 62 300 with 40K original miles we installed the same setup.Ran minimium 45 to 50 hot all the time.That ran like 15 years and never a problem even with the OE 62 drive.Rocky
Chrysler Firepower
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Re: big block oil pump question
[Re: gregcharger72]
#2643611
04/10/19 11:02 AM
04/10/19 11:02 AM
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Joined: Jan 2003
Posts: 18,025 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
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Posts: 18,025
S.E. Michigan
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It's not really trial and error, it's just relatively easy to access and tweak on anytime you want, so we get kind of spoiled by that design feature.
A HV pump generally comes with the high pressure spring in it. Either worst, or best of both worlds depending on how you look at it.
I have an M63HV still in service from around 1988....
Rich H.
Esse Quam Videri
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Re: big block oil pump question
[Re: AndyF]
#2643626
04/10/19 11:40 AM
04/10/19 11:40 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I use a plate to measure the oil pressure on my stuff.. its a block off plate with a pressure gauge.. most of my SB pumps have a blow off point of 70#
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Re: big block oil pump question
[Re: therocks]
#2643658
04/10/19 01:04 PM
04/10/19 01:04 PM
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Joined: Jan 2003
Posts: 26,470 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,470
Rio Linda, CA
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A HV pump really dosent increase pressure Sure it does....if lack of volume with a stock pump is the cause of low pressure.
The INTERNET, the MISinformation superhighway
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Re: big block oil pump question
[Re: mopar dave]
#2643696
04/10/19 02:34 PM
04/10/19 02:34 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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Posts: 4,457
Washington
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Sounds like plenty of pressure to fire it up and see what you really have when hot. Someone posted here last week that nascar engines have 30-35 psi oil pressure going around the track. I believe oil flow is more important than pressure. If that's true, then you will have plenty of pressure. I use a Milodon oil pump I bought from Andy on my 511. I have 75# cold and 35# at idle hot and that is with .033 main .028 rod bearing clearance and using 15/50 Amsoil. Awesome pump. Run the oil pressure that low with the Chrysler oiling system and it will live about 5 minutes. You can't compare what NASCAR is doing with stock block stuff.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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