Mopar Mechanical Oil Pump Volumes 383 etyc

John Lang · 08-10-2015, 12:05 PM

Anybody have an idea of the volume's and pressure's of there various pumps for the various B, and RB wedge engines ! Or what could be the cause of too MUCH oil pressure ? This on my SS Hemi, which has a Milodon dual line oil system ! I have 85# at idle, and over 110 when you wing the gas ! ! I've changed springs etc ! I've have been told to take the Milodon pump out and replace it with a stock pump but use the Milodon cover, and filter mount, and dual pickup ! That scares me ! Anybody have any ideas, this is a Fresh Rebuild ! ...John

FED 387 · 08-10-2015, 12:37 PM

weight/viscosity of oil ---are you using only Castrol/Mobil1/Red Line/ Royal Purple oils and NON synthetics for the break in? ----tight clearances when rebuilt--restriction in the system lines kinked too many bends etc.---wrong oil filter restricting the oil--- too high a relief spring--- did you open up the oil passage on the pump to 1/2 inch from 3/8 inch ?-- remember pressure IS NOT Volume!!! restrictions increase pressure--also might contact 440source.com for their adjustable oil pump pressure regulator--- part # 200-1093 $24.95--- tele 775-883-2590---FED 387

shumate65 · 08-10-2015, 01:00 PM

I have my back up pump on Ebay for sale. It is a high volume pump from Westcott that is good. It will run 55-60 down track and 35-40 at idle with race oil. Just selling off all my extra stuff to fix my new piece that I broke at Columbus. John, Ollie, and Dave can rest easy at Indy.

Bill Edgeworth · 08-10-2015, 06:42 PM

Quote:

Originally Posted by John Lang

Anybody have an idea of the volume's and pressure's of there various pumps for the various B, and RB wedge engines ! Or what could be the cause of too MUCH oil pressure ? This on my SS Hemi, which has a Milodon dual line oil system ! I have 85# at idle, and over 110 when you wing the gas ! ! I've changed springs etc ! I've have been told to take the Milodon pump out and replace it with a stock pump but use the Milodon cover, and filter mount, and dual pickup ! That scares me ! Anybody have any ideas, this is a Fresh Rebuild ! ...John

Years ago Alan Lee built a low deck 500 for me and I took him what I thought would be best for a 7500RPM B motor. I sent him a fancy 10qt Charlie's pan with the kick outs, the dual swinging pick up and the Milodon pump. He told me that just about all of it was not necessary and basically gave me the same advice you were given.
A coupe things he said in particular was that the big pump just eats horsepower and the pan was way overkill for that particular B engine because they have really good drain back characteristics .
As for the pressure issue it may be an issue with the bypass/pressure relief circuit flow capacity.

BTW that engine worked just fine with the Milodon pick up and stock pump.

John Lang · 08-12-2015, 05:10 PM

Just a note to THANK all of you for the response's, I have also changed Gauges be for I change pumps tomorrow ! ..Thanks again, Race Safely and have a good time ! John

rickseeman · 08-13-2015, 01:47 PM

To fix the high oil pressure, the easiest way out is to put an externally adjustable relief valve in the oil pump replacing the stock spring setup. Only takes a few minutes. Milodon and 440 source offer them. $20 and you are done.

John Lang · 08-13-2015, 06:51 PM

I have had the adjustable valve and reset everything, and it dropped from 85# at idle to 63# at idle ! But when you winged the throttle the pressure still would go over 110# !!!! I've talked to several well known Hemi builders and was told to get a Stock pressure oil pump, and use the Milodon cover and filter mount ! I blocked off one of the oil pickup's in the oil pan, and I don't have the new pump yet, possibly Sat ! Thanks again, I'll post after I get the new pump setup ! I've raced Mopar's for years as in 30+ years and never had this problem ! Wish me luck !!! John

Barnstorm · 08-13-2015, 08:51 PM

Quote:

Originally Posted by John Lang

Anybody have an idea of the volume's and pressure's of there various pumps for the various B, and RB wedge engines ! Or what could be the cause of too MUCH oil pressure ? This on my SS Hemi, which has a Milodon dual line oil system ! I have 85# at idle, and over 110 when you wing the gas ! ! I've changed springs etc ! I've have been told to take the Milodon pump out and replace it with a stock pump but use the Milodon cover, and filter mount, and dual pickup ! That scares me ! Anybody have any ideas, this is a Fresh Rebuild ! ...John

Drag your engine builder over to Union Grove and put a hit on the car.

John Lang · 08-30-2015, 12:51 PM

Oil Problem fixed ! 383 pump, w/milodon , cover, etc. ! 72# pressure at idle, 80# when you hit the throttle up to 4000 ! Temp at 130 ! ...John

08-10-2015, 12:05 PM	#1
John Lang Member Join Date: Oct 2003 Location: Sheboygan Wi Posts: 391 Likes: 0 Liked 6 Times in 2 Posts	Mopar Mechanical Oil Pump Volumes 383 etyc Anybody have an idea of the volume's and pressure's of there various pumps for the various B, and RB wedge engines ! Or what could be the cause of too MUCH oil pressure ? This on my SS Hemi, which has a Milodon dual line oil system ! I have 85# at idle, and over 110 when you wing the gas ! ! I've changed springs etc ! I've have been told to take the Milodon pump out and replace it with a stock pump but use the Milodon cover, and filter mount, and dual pickup ! That scares me ! Anybody have any ideas, this is a Fresh Rebuild ! ...John __________________ John Lang 365 STK, SS

08-10-2015, 12:37 PM	#2
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,419 Likes: 525 Liked 332 Times in 180 Posts	Re: Mopar Mechanical Oil Pump Volumes 383 etyc weight/viscosity of oil ---are you using only Castrol/Mobil1/Red Line/ Royal Purple oils and NON synthetics for the break in? ----tight clearances when rebuilt--restriction in the system lines kinked too many bends etc.---wrong oil filter restricting the oil--- too high a relief spring--- did you open up the oil passage on the pump to 1/2 inch from 3/8 inch ?-- remember pressure IS NOT Volume!!! restrictions increase pressure--also might contact 440source.com for their adjustable oil pump pressure regulator--- part # 200-1093 $24.95--- tele 775-883-2590---FED 387 Last edited by FED 387; 08-10-2015 at 12:43 PM.

08-10-2015, 01:00 PM	#3
shumate65 Junior Member Join Date: Dec 2011 Posts: 15 Likes: 0 Liked 0 Times in 0 Posts	Re: Mopar Mechanical Oil Pump Volumes 383 etyc I have my back up pump on Ebay for sale. It is a high volume pump from Westcott that is good. It will run 55-60 down track and 35-40 at idle with race oil. Just selling off all my extra stuff to fix my new piece that I broke at Columbus. John, Ollie, and Dave can rest easy at Indy.

08-12-2015, 05:10 PM	#5
John Lang Member Join Date: Oct 2003 Location: Sheboygan Wi Posts: 391 Likes: 0 Liked 6 Times in 2 Posts	Re: Mopar Mechanical Oil Pump Volumes 383 etyc Just a note to THANK all of you for the response's, I have also changed Gauges be for I change pumps tomorrow ! ..Thanks again, Race Safely and have a good time ! John __________________ John Lang 365 STK, SS

08-13-2015, 01:47 PM	#6
rickseeman Member Join Date: Sep 2011 Location: Stuttgart, AR Posts: 125 Likes: 0 Liked 2 Times in 2 Posts	Re: Mopar Mechanical Oil Pump Volumes 383 etyc To fix the high oil pressure, the easiest way out is to put an externally adjustable relief valve in the oil pump replacing the stock spring setup. Only takes a few minutes. Milodon and 440 source offer them. $20 and you are done.

08-13-2015, 06:51 PM	#7
John Lang Member Join Date: Oct 2003 Location: Sheboygan Wi Posts: 391 Likes: 0 Liked 6 Times in 2 Posts	Re: Mopar Mechanical Oil Pump Volumes 383 etyc I have had the adjustable valve and reset everything, and it dropped from 85# at idle to 63# at idle ! But when you winged the throttle the pressure still would go over 110# !!!! I've talked to several well known Hemi builders and was told to get a Stock pressure oil pump, and use the Milodon cover and filter mount ! I blocked off one of the oil pickup's in the oil pan, and I don't have the new pump yet, possibly Sat ! Thanks again, I'll post after I get the new pump setup ! I've raced Mopar's for years as in 30+ years and never had this problem ! Wish me luck !!! John __________________ John Lang 365 STK, SS

08-30-2015, 12:51 PM	#9
John Lang Member Join Date: Oct 2003 Location: Sheboygan Wi Posts: 391 Likes: 0 Liked 6 Times in 2 Posts	Re: Mopar Mechanical Oil Pump Volumes 383 etyc Oil Problem fixed ! 383 pump, w/milodon , cover, etc. ! 72# pressure at idle, 80# when you hit the throttle up to 4000 ! Temp at 130 ! ...John __________________ John Lang 365 STK, SS