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Least amount of oil pressure when pushrod oiling a B/RB #457646 09/02/09 05:25 PM 09/02/09 05:25 PM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	Whats the least amount of oil pressure you guys running when pushrod oiling a big block? I have a 572 with 572-13 heads and a dual line milodon system i am running around 8 to 10 psi at an idle when the motor is hot after a pass with 20w50 oil It has 75 psi going down the race track. I have cut 4 oil filters apart now after 60 passes on the motor and its not showing any signs of hurting anything. Would you be worried or let it eat the way it is for the rest of the year. And no the lifter bores are not bushed and it is a mega block. Thanks.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457647 09/02/09 05:31 PM 09/02/09 05:31 PM
A Anonymous Unregistered
Anonymous Unregistered A	thats very low to me but its just idling, going down the track is where you want it., im thinking bearing clearance issues. mine idles at 60psi hot 75 going down the track and 80 psi cold on my motor.

Re: Least amount of oil pressure when pushrod oiling a B/RB #457648 09/02/09 06:06 PM 09/02/09 06:06 PM
Joined: Sep 2003 Posts: 90 ok M mopdragster member
mopdragster member M Joined: Sep 2003 Posts: 90 ok	My 540 B-1 did the same thing 80lbs cold 20lbs hot after a run at 1000rpm idling back. I put restrictors in the pushrods .030 and now it is 35 lbs hot idling with 20-50 val racing. It was always 80 on racetrack. I also checked the filters and was clean but I would be scared 2 death of 10lbs at idle even in a stock motor. But I am a wimp when it comes to oil pressure.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: mopdragster] #457649 09/02/09 06:43 PM 09/02/09 06:43 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Had the same problem , 605" megablock with 572-13 heads , i ended up plugging the oil way on gallery side of lifter & using the lifter bore as the restriction , i now have 25/30lb @ idle , 60/70lb down track. I purchased the motor with a spun rod bearing , maybe this was the cause. Last edited by 602heavy; 09/02/09 06:46 PM.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: 602heavy] #457650 09/02/09 08:10 PM 09/02/09 08:10 PM
Joined: Jan 2003 Posts: 16,925 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,925 NC	I would turn the idle rpm up to get more oil pressure until the end of the season and then restrict oil to the heads. FWIW, I run 10W-30 oil with all bracket racing going round-robin after 3rd round every week. I would change things in your motor over the winter. (bearing clearance, oil passages whatever is needed.) 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: 440Jim] #457651 09/03/09 08:23 AM 09/03/09 08:23 AM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	All bearing clearances where all dead on in the middle of the specs.It is an aluminum rod motor so i know i will lose a little there. Whats the best way to restrict the oil to the heads on this setup..I dont care to go ahead and do it cause i will be racing until the end of November at least.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457652 09/03/09 09:00 AM 09/03/09 09:00 AM
Joined: Sep 2003 Posts: 90 ok M mopdragster member
mopdragster member M Joined: Sep 2003 Posts: 90 ok	I would send the pushrods in and have them restricted. It is cheap fast and reversible if you decide it didn't help. Mine has bushed lifter bores with a .070 hole in bushing not lined up with the hole in the lifter and I still had oil pressure problem but mine just has a std volume oil pump. Gonna change that this winter.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: mopdragster] #457653 09/03/09 09:11 AM 09/03/09 09:11 AM
Joined: Nov 2004 Posts: 7,274 s.w.fl B bonefish master
bonefish master B Joined: Nov 2004 Posts: 7,274 s.w.fl	what rpm are you idling at?

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: bonefish] #457654 09/03/09 09:38 AM 09/03/09 09:38 AM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	Around 12 to 1300 in gear.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457655 09/03/09 10:40 AM 09/03/09 10:40 AM
Joined: Aug 2003 Posts: 43,157 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,157 Bend,OR USA	Quote: Whats the best way to restrict the oil to the heads on this setup..I dont care to go ahead and do it cause i will be racing until the end of November at least. I don't know the best way but I used a piece of .080 bracing rod and made a L out of it so it would fit into and under the fitting in the head so it stuck up into the fitting the line attaches onto. I hope this makes sense Quick, easy and removeable Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: Cab_Burge] #457656 09/03/09 11:06 AM 09/03/09 11:06 AM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	Quote: Quote: Whats the best way to restrict the oil to the heads on this setup..I dont care to go ahead and do it cause i will be racing until the end of November at least. I don't know the best way but I used a piece of .080 bracing rod and made a L out of it so it would fit into and under the fitting in the head so it stuck up into the fitting the line attaches onto. I hope this makes sense Quick, easy and removeable The 572-13 heads doesn't have any external lines like the -1 heads do..Thats why im not sure how to restrict them.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457657 09/03/09 11:48 AM 09/03/09 11:48 AM
Joined: Aug 2003 Posts: 43,157 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,157 Bend,OR USA	Quote: Quote: Quote: Whats the best way to restrict the oil to the heads on this setup..I dont care to go ahead and do it cause i will be racing until the end of November at least. I don't know the best way but I used a piece of .080 bracing rod and made a L out of it so it would fit into and under the fitting in the head so it stuck up into the fitting the line attaches onto. I hope this makes sense Quick, easy and removeable The 572-13 heads doesn't have any external lines like the -1 heads do..Thats why im not sure how to restrict them. My bad, I wasn't aware of that How about using a press in bushing or epoxy a jet or some other orifice that will fit into the oil passage feeding the rockers or are they pushrod oiling only? Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: Cab_Burge] #457658 09/03/09 12:08 PM 09/03/09 12:08 PM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	Yea it's pushrod oiling only with jesel rockers

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457659 09/03/09 12:32 PM 09/03/09 12:32 PM
Joined: Nov 2004 Posts: 7,274 s.w.fl B bonefish master
bonefish master B Joined: Nov 2004 Posts: 7,274 s.w.fl	Quote: Around 12 to 1300 in gear. yeh 10lbs is a little low.im thinking about a similar combo,keep us posted.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: bonefish] #457660 09/03/09 01:15 PM 09/03/09 01:15 PM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	Im gonna check the pushrods tonight..I told Manton to restrict them to .030 but im starting to wander if maybe they restricted them down .030 from the origanal size which would make them around .090.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457661 09/03/09 05:53 PM 09/03/09 05:53 PM
Joined: Feb 2006 Posts: 243 NJ A arc enthusiast
arc enthusiast A Joined: Feb 2006 Posts: 243 NJ	Quote: Im gonna check the pushrods tonight..I told Manton to restrict them to .030 but im starting to wander if maybe they restricted them down .030 from the origanal size which would make them around .090. is the block bushed and if it is what size hole in the bushing we use a .030 hole in the bushing 5460325-IMG_0008_1.jpg (41 downloads)

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: arc] #457662 09/03/09 08:08 PM 09/03/09 08:08 PM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	Just checked th restrictor and indeed it's a .030. ARC the block is not bushed.. So know what should my next step be?

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457663 09/03/09 08:36 PM 09/03/09 08:36 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	So know what should my next step be? There isnt much you can do.... more flow or thicker oil... remember pressure is a by-product of flow due to restriction ... so hopefully you still have good flow to the bearings(just not much pressure)... have you checked it with another gauge

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457664 09/03/09 08:38 PM 09/03/09 08:38 PM
Joined: Oct 2004 Posts: 354 Livonia Michigan 440dart enthusiast
440dart enthusiast Joined: Oct 2004 Posts: 354 Livonia Michigan	Install an oil cooler that should help until you have a chance to go through the motor Yes I live in Michigan, so there is still 1 light on

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: sc301v] #457665 09/03/09 09:42 PM 09/03/09 09:42 PM
Joined: Feb 2006 Posts: 243 NJ A arc enthusiast
arc enthusiast A Joined: Feb 2006 Posts: 243 NJ	Quote: Just checked th restrictor and indeed it's a .030. ARC the block is not bushed.. So know what should my next step be? I have 15 at idle after a pass but i have alu block the only thing I would watch is the pushrod tips 2 see if they are getting blue I think u are bleeding around the lifters on next rebuild bush the block its worth the 600 dollars Last edited by arc; 09/03/09 09:43 PM.

Re: Least amount of oil pressure when pushrod oiling a B/RB [Re: arc] #457666 09/04/09 09:19 AM 09/04/09 09:19 AM
Joined: Feb 2008 Posts: 364 Kentucky S sc301v OP enthusiast
sc301v OP enthusiast S Joined: Feb 2008 Posts: 364 Kentucky	Havent checked it with another gauge.. I wander if putting a .025 restrictor in would help very much. The pushrods dont even look like they have ever even been ran.There is plenty of oil up top it seems.

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