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Re: Oil pressure issues STILL !!!!! Help needed
[Re: sc301v]
#661422
04/05/10 09:03 AM
04/05/10 09:03 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
Here's the run down on the motor...572 c.i.d. with 572-13 indy heads and mopar mega block..
Jesel rocker arms with crower sever duty lifters pushrod oiling with .030 restrictors in the pushrods...Lifter bores are unbushed..
Grp aluminum rods with .0025 bearing clearance and ..025 side clearance.
Callies crank with .0025 clearance..and .007 end play..
All the bearings are brand new including cam bearings.
1st start up of the day cold p.s.i is 75 pds.
After warm up drops off to around 25..
Then after a pass and coming back to the trailer only have 5-7 p.s.i.
If i set between time runs for a while when you start the car back up after cool down it will be around 20 p.s.i. then by the time you get back to the lanes ande let the car warm up it we be back down to around 10 then same after the pass coming back to the trailer it will be 5-7 again..
It does have a new dual line milodon oil system on it with the Indy cover plate..
Im still thinking im losin all the pressure around the lifters cause no matter where i adjust the pressure to going down track its still the same at an idle.
Any and all ideas will be greatly appreciated...Im not gonna run this motor any more till i can get at least 25 p.s.i hot..
Thanks in advance
Bush the lifter bores or tube the block.
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: BobR]
#661424
04/05/10 09:30 AM
04/05/10 09:30 AM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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On the top on cover of the pump is your pressure spring(I think thats what its called).But if it does not have any washers in it,you can put up to 3 in it. Most of the time 2 is about right. This will give you more pressure,maybe a little more than needed when cold. But what you are after is pressure after its hot.
What is your pressure when going down the track? I have been told as long as you have 10 lbs of pressure for every 1,000 RPM you are good to go. The idle pressure is nt much to worry about.
I sure some others on here can help you a lot better.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: MRMOPAR622]
#661425
04/05/10 09:32 AM
04/05/10 09:32 AM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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I will check in a few mins and get back,but I am thinking with my 572-13 heads do not oil thru the lifters and push rods.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: mopdragster]
#661426
04/05/10 09:35 AM
04/05/10 09:35 AM
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Joined: Feb 2008
Posts: 364
Kentucky
sc301v
OP
enthusiast
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OP
enthusiast
Joined: Feb 2008
Posts: 364
Kentucky
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Quote:
I have a little of the same problem. mega block with isky lifters but have lifter bushings. I also pushrod oil b-1's + t+d's. Has 80 cold and down track but hot after a run has 20 w 10-30 oil and 30 with 20-50 oil. I have tried both std and hv oil pumps same results at idle. I have a .080 hole in the bushing for oil to the lifter I am wondering if that is too big or If I have too much lifter bore clearance. Was going to change both when I disassemble next winter. I also run 030 restrictors in the pushrods
I would be tickled to death with 30 at an idle..
My pressure now is with 20-50 oil
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: challenger1320]
#661428
04/05/10 10:43 AM
04/05/10 10:43 AM
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Joined: Jan 2003
Posts: 19,379
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,379
Las Vegas
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What filter? Sorry what filter is th OP using.. Isn't Mopar Fram?
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: challenger1320]
#661430
04/05/10 10:53 AM
04/05/10 10:53 AM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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I have a System One oil filter. Everyone needs one.
Had to go pick up the Wifes car at her work place.Going out to the shop to put some plugs in it and will check my push rods & lifters. I think they do not oil thru them.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: MRMOPAR622]
#661431
04/05/10 11:09 AM
04/05/10 11:09 AM
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Joined: Dec 2008
Posts: 1,200
UK
602heavy
pro stock
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pro stock
Joined: Dec 2008
Posts: 1,200
UK
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I get around 20psi @ idle & 50psi down track with 20/50 @ 180* temp , indy 572-13 heads with spray bar oiling along with PR oiling , lifter bores are unbushed with lifters drilled for .030" oiling for pushrods , pushrods are not restricted although rocke arm adjusters are not drilled (plugged them) , i found an improvement on oil pressure when i opened up all oil ways in oil pump , also opened up oil ways in sandwhich plate & oil pump filter adaptor , i had around 10psi before drilling the HV oil pump , seems this mod allows more volume of oil through the pump which will help maintain a better pressure @ idle , i like the leak down @ lifter bore (un bushed)when running roller lifters , i run this on the street with no issues , idle is around 1000rpm with oil pressure @ 15/20psi , what is you're idle speed? 
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: jamesc]
#661434
04/05/10 11:51 AM
04/05/10 11:51 AM
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Joined: Feb 2008
Posts: 364
Kentucky
sc301v
OP
enthusiast
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OP
enthusiast
Joined: Feb 2008
Posts: 364
Kentucky
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Quote:
like Bob was getting at (i assume) are the lifters uncovering the oil galley any?
That is my guess that the band on the lifter is letting the pressure bleed off...I asked about that several times before ordering the lifters but thats a whole different story.
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: sc301v]
#661435
04/05/10 12:24 PM
04/05/10 12:24 PM
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Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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Quote:
I asked about that several times before ordering the lifters but thats a whole different story.
yea it seems to be a real crap shoot when it comes to using rollers in these engines especially larger lifts and/or base circle...just one hassle after another. you do your best to research and make sure you're getting the right stuff and still have problems (if that's what it is).
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: sc301v]
#661440
04/05/10 07:07 PM
04/05/10 07:07 PM
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Joined: Apr 2005
Posts: 1,880
USA
Ron Silva
top fuel
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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If the oil band (really the bottom of the lifter) was creating a leak at max lift you can physically see this if you pre-oil the motor on the stand (or chassis) with the intake off. Oil will squirt out over the cam shaft. Run the drill and rotate the motor slowly at least 2 turns to check. Also if this is happening the oil pressure might fluctuate or pulse when the engine is running.
Also in my Small block switching to lifters with the oil feed to the roller wheel it dropped my oil pressure something like 10-15PSI at idle over the ones without. I think that feed should be an edge orfice and not feed from the oil band, but what do I know??
Last edited by dragrcr97; 04/05/10 07:12 PM.
SRT DEMON ONE SEAT
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My new motor has the lifter bores bushed 
