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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: 19,369
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,369
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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Re: Oil pressure issues STILL !!!!! Help needed
[Re: sc301v]
#661441
04/07/10 06:45 AM
04/07/10 06:45 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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i've used those exact lifters in unbushed blocks a number of times and have never experienced the type of problem you describe.
basically you have a bunch of "controlled" leaks, (i.e. oil to the roller and pushrod oiling.)it's not likely your uncovering the oil gallery, but did you check when installing the lifters? what was your measured lifter to bore clearance during installation? without that information, one could only guess at where the problem may be IMO. is it time for a better pump? the dual line is great, but is the pump itself capable of supplying the volume you need? the dual line is on the INPUT side of the pump, not the OUTPUT.
my guess is that in order to actually fix the problem, you'll have to start investigating all area's of the oiling system and critical dimensons and clearances.
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: sc301v]
#661444
04/07/10 01:07 PM
04/07/10 01:07 PM
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Joined: Aug 2003
Posts: 43,213
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,213
Bend,OR USA
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Verify the gauge, check it agianst another known accurate gauge BTW what is your idle speed?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: sc301v]
#661446
04/08/10 12:25 AM
04/08/10 12:25 AM
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Joined: Aug 2003
Posts: 43,213
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,213
Bend,OR USA
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Is this a aluminum block?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Oil pressure issues STILL !!!!! Help needed
[Re: Cab_Burge]
#661447
04/08/10 08:29 AM
04/08/10 08:29 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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Re: Oil pressure issues STILL !!!!! Help needed
[Re: sc301v]
#661448
04/08/10 09:59 AM
04/08/10 09:59 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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Last season before a roller lifter went out and got in my oil pump. With the Indy single line pump(with 2 washers on the pressure spring) and dragster pan I had 80 lbs @ idle Hot & Cold when you revved the engine it would go up to 100 lbs.
So my question is have you took your pickup out and checked it? I had cleaned my oil pan before,but never took the pickup out. Could something be blocking some of the opening?
I hope to get my heads back in a few days. I have already made a mistake before I start back on the engine. I was sure my engine did not oil thru the lifters and push rods,but it does.
It would be nice if all of us could make a list of things to check are do before building our engines. I know I had rather spend a little more time and money now than have to go back later hunting things to fix.
"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: Cab_Burge]
#661451
04/08/10 04:31 PM
04/08/10 04:31 PM
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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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SC30 , i have the same set up as you . also had the same issues as you're having , i got there in the end as i'm sure you will , get the motor on the engine stand & figure where the excessive leak down is & i'm sure you'll fix the problem , when you prime the motor it should all come clear. As i said previously in this post , the oil pump mod netted an increase in oil pressure of around 10/15psi. Good luck.
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My new motor has the lifter bores bushed 
...but every once in a blue moon something can go wrong. It'd be simple enough to check anyway.