BB Mopar Oil Drainback Modifications???

acme383 · 01-21-2013, 01:46 PM

I was wondering what Modifications people were doing to a Big Block Mopar to get the oil to return to the pan faster. Pics would be appreciated. thanks Dan

GTX JOHN · 01-21-2013, 07:39 PM

I have never had a problem except with Stage 6 Heads not draining.

Is it the Cylinder Head area or Lifter Galley area that is collecting Oil?

acme383 · 01-22-2013, 11:41 AM

they are Indy 440-1 heads. I don't know if it's staying in the heads or lifter. i seem to be losing pressure at the end of the track. it's got a Charlies pan with trap doors and swinging pick up and it has the lifter bores bushed with .030 holes for push rod oiling. so I'm limiting the amount of oil to the rocker gear. I'm installing a moroso accumulator to band-aid the problem. It's a stick car, with a big stroke, so it's really throwing oil around. i have this feeling that it is emptying the pan even with 9 quarts of oil. i've tried any where from 6-10 quarts.

Bob Pagano · 01-22-2013, 05:05 PM

Sounds like to much oil pressure, put in a softer spring in the pump.

GTX JOHN · 01-23-2013, 02:09 AM

I have run the Indy heads on 1/2 Stroker 440 with just a Milodon pan and pump
with only eight quarts. I run Mobil on 10-30 synthetic with Zero problems.

I had issues with Oil foaming and nearly emptying the pan only when I ran a 15 - 50 Conventional Non syn. oil early on with the engine. I do not know if it was
the higher oil pressure or the foaming slowing the return or possibly
both working together that was the problem.

I since have broken the engine in and change oils before making a hard pass
on the bracket cars.

Hope this Helps!

acme383 · 01-23-2013, 10:53 AM

I started to think about when did i start having this problem. I think it is from the Main stud girdle that i put on it. not enough room for the oil to drain back at a fast enough rate. it was probably acting like a second windage tray. now i purchased an aftermarket mega block. so bye, bye stud girdle. What oil pressure would you recommend? i have an adjustable milidon spring set up in the pump. i usually try to limit to 80psi going down the track.

Bob Pagano · 01-23-2013, 12:34 PM

Milodon system run on Steins cars back in the day, never went over 60 # or it would empty the pan.

01-21-2013, 01:46 PM	#1
acme383 Junior Member Join Date: Mar 2005 Location: chitown Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	BB Mopar Oil Drainback Modifications??? I was wondering what Modifications people were doing to a Big Block Mopar to get the oil to return to the pan faster. Pics would be appreciated. thanks Dan

01-21-2013, 07:39 PM	#2
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,720 Likes: 2,768 Liked 2,428 Times in 688 Posts	Re: BB Mopar Oil Drainback Modifications??? I have never had a problem except with Stage 6 Heads not draining. Is it the Cylinder Head area or Lifter Galley area that is collecting Oil? Last edited by GTX JOHN; 01-22-2013 at 04:16 AM.

01-22-2013, 11:41 AM	#3
acme383 Junior Member Join Date: Mar 2005 Location: chitown Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	Re: BB Mopar Oil Drainback Modifications??? they are Indy 440-1 heads. I don't know if it's staying in the heads or lifter. i seem to be losing pressure at the end of the track. it's got a Charlies pan with trap doors and swinging pick up and it has the lifter bores bushed with .030 holes for push rod oiling. so I'm limiting the amount of oil to the rocker gear. I'm installing a moroso accumulator to band-aid the problem. It's a stick car, with a big stroke, so it's really throwing oil around. i have this feeling that it is emptying the pan even with 9 quarts of oil. i've tried any where from 6-10 quarts.

01-22-2013, 05:05 PM	#4
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 236 Liked 16 Times in 11 Posts	Re: BB Mopar Oil Drainback Modifications??? Sounds like to much oil pressure, put in a softer spring in the pump. __________________ Bob Pagano A/SA

01-23-2013, 02:09 AM	#5
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,720 Likes: 2,768 Liked 2,428 Times in 688 Posts	Re: BB Mopar Oil Drainback Modifications??? I have run the Indy heads on 1/2 Stroker 440 with just a Milodon pan and pump with only eight quarts. I run Mobil on 10-30 synthetic with Zero problems. I had issues with Oil foaming and nearly emptying the pan only when I ran a 15 - 50 Conventional Non syn. oil early on with the engine. I do not know if it was the higher oil pressure or the foaming slowing the return or possibly both working together that was the problem. I since have broken the engine in and change oils before making a hard pass on the bracket cars. Hope this Helps!

01-23-2013, 10:53 AM	#6
acme383 Junior Member Join Date: Mar 2005 Location: chitown Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	Re: BB Mopar Oil Drainback Modifications??? I started to think about when did i start having this problem. I think it is from the Main stud girdle that i put on it. not enough room for the oil to drain back at a fast enough rate. it was probably acting like a second windage tray. now i purchased an aftermarket mega block. so bye, bye stud girdle. What oil pressure would you recommend? i have an adjustable milidon spring set up in the pump. i usually try to limit to 80psi going down the track. Attached Thumbnails Last edited by acme383; 01-23-2013 at 10:58 AM. Reason: added pic

01-23-2013, 12:34 PM	#7
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 236 Liked 16 Times in 11 Posts	Re: BB Mopar Oil Drainback Modifications??? Milodon system run on Steins cars back in the day, never went over 60 # or it would empty the pan. __________________ Bob Pagano A/SA