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First run on the STREET! Oil pressure drops LOWat idle?
#1010451
06/10/11 10:23 AM
06/10/11 10:23 AM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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I just got back from running the Challenger for the FIRST TIME  . The oil PSI while running is b/w 45 - 55. At idle it drops to 15 - 20  . Is this NORMAL??? In the garage it ran at idle b/w 40 - 50 but it's never been driven. It's is a FRESH stock built 440 with a 268* Comp cam with 0 miles. A crusier built car - no mods....Running 10W-30. Thanks 
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: Plum440]
#1010453
06/10/11 10:32 AM
06/10/11 10:32 AM
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Joined: Jan 2003
Posts: 74,942
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,942
U.S.S.A.
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Quote:
IS the rule of thumb 10 per 1,000 in relation to RPMs? Just found that on an on-line search 
Yes it is , though that is a little low for a fresh build , what pump do you have ?
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: Diplomat360]
#1010456
06/10/11 10:39 AM
06/10/11 10:39 AM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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Quote:
YES, you are looking for 10PSI/1K RPM typically....I think you are fine with 15-20 at idle...some setups might show more, etc....but this should be fine.
Can you tell regarding your engine what the bearing clearances were like? Loose or tight side?
Not sure about the bearing clearances. I do know the builder and the shop have a GREAT reputation! Thank!
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: JohnRR]
#1010457
06/10/11 10:40 AM
06/10/11 10:40 AM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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Quote:
Quote:
IS the rule of thumb 10 per 1,000 in relation to RPMs? Just found that on an on-line search
Yes it is , though that is a little low for a fresh build , what pump do you have ?
Melling high performance - OEM type.
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: Diplomat360]
#1010458
06/10/11 10:41 AM
06/10/11 10:41 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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gauges can vary also i have one thats 10lbs off from any others i have used. my 440 does about the same thing and its well used with 75,000 miles on it. may bump up to a thicker oil when you change it. i run the napa fleet 15/40 in all of mine,10/30 drops pressure way down on mine  you did break the cam in with a oil additive with high zink correct? on a fresh engine I change the oil 2-3 times in short order and cut the filter open to look for junk/shavings..ect after that i lets it rip and change it when it gets black 
Last edited by scratchnfotraction; 06/10/11 10:43 AM.
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: Challenger 1]
#1010459
06/10/11 10:42 AM
06/10/11 10:42 AM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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Quote:
Should be OK, keep an eye on it and if it don't go down anymore, it'll be fine. Good luck with it and enjoy!
Thanks! I'm sure you remember that first time feeling of rowing through the gears of your FIRST BIG BLOCK!
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: Mr.Yuck]
#1010461
06/10/11 11:38 AM
06/10/11 11:38 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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my big block used full groove main bearings (full time oiling vs half with stock bearings) and an High Volume oil pump, and it had the following numbers:
with 15w40 oil:
PSI at cold engine start up 75 psi
hot idle 30 psi
hot cruise 45-50 psi below 2000 rpm, and 60-65 above 2000 rpm.
switched to 10w30:
cold start up 75 psi
hot idle 20-25
hot cruise below 2000 rpm was 40 or so, and 55-ish above 2000 rpm.
knowing if you have full groove main bearings or not would help, as well as whether or not it's a stock pump or HV pump. (you said "high performance OEM type)
**Photobucket sucks**
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: Plum440]
#1010462
06/10/11 01:39 PM
06/10/11 01:39 PM
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Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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What RPM is it idling at? Like mentioned above, the pressures you gave are close to the minimums. I would run a bit thicker oil....15-40 or something.
I just bolted on the billet Milidon pump and their low-profile, baffled roadrace pan. I'm sure my hot idle pressures will be up now.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: ademon]
#1010464
06/10/11 03:15 PM
06/10/11 03:15 PM
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Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,499
Slidell, LA
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I'm just running Pennzoil 10W-30 with a break-in additive for the cam. The oil pump is a high volume oil pump. I think I'll switch to a thicker oil after I drain this first round. Thanks!!
70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…
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Re: First run on the STREET! Oil pressure drops LOWat idle?
[Re: JohnRR]
#1010465
06/10/11 08:16 PM
06/10/11 08:16 PM
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Joined: Feb 2005
Posts: 4,310
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,310
Prospect, PA
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Quote:
Quote:
IS the rule of thumb 10 per 1,000 in relation to RPMs? Just found that on an on-line search
Yes it is , though that is a little low for a fresh build , what pump do you have ?
 . Its not too low, but is low for a new motor and it would be nice to know why.
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