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04-16-2007, 05:49 AM
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CC Member
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Join Date: Oct 2006
Location: Long Island,
ny
Cobra Make, Engine: Midstates, 501
Posts: 120
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Not Ranked
oil pressure and oil used
Guys,
Just looking for a little insight into what oil most guys are using and what kind of oil pressure you are getting. I have read about zink contents too any opinions.
Looking for type, wt, and pressure at idle warm and under different loads.
I think I may have a problem and want to compare notes.
Mike |
04-16-2007, 06:16 AM
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CC Member
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Join Date: Jan 2002
Location: Morristown,
nj
Cobra Make, Engine: SPF #623 460/4x2
Posts: 858
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Not Ranked
I use royal purple synth'. 10w40. My oil pressure has been pretty consistent at 45 over 2000 rpm and 25 at idle. In the heat of the summer it wants to drop from there so I have put in 20w50 which will bring it back to the numbers above. I never have a problem with the pressure at higher rpms, its always an idle issue.
__________________
Dane
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04-16-2007, 07:02 AM
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Senior Club Cobra Member
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Join Date: Mar 2000
Location: St. Augustine,
FL
Cobra Make, Engine: E-M / Power Performance / 521 stroker / Holley HP EFI
Posts: 1,932
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Not Ranked
Mike,
I use Castrol 20W50. Pressure is around 20-40 psi at idle (idle is gloriously lumpy), 55-60 psi at speed, warm. Cold is around 60 psi at all engine speeds. Takes a few minutes to warm up as it has an engine oil cooler.
Pressure gauge is mechanical and input is taken from the block rear center tap above the bell housing just behind and below the intake manifold.
I understand that the indicated pressure may be a bit higher at the tap on the front left side (facing forward) of the block just above where the mechanical fuel would go if I had one, since it's just on the output gallery of the oil pump, but I haven't checked it there. I use that tap for the ACCUSUMP.
I use a "normal" Melling pump. No high volume, no high pressure, no heavy duty. I'm too paranoid about losing another camshaft and distributor.
This combo has worked in the 521 for 18K miles just fine.
Tom
__________________
Wells's law of engine size: If it matters what gear you're in, the engine's too small!
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04-16-2007, 08:51 AM
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CC Member
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Join Date: Oct 2006
Location: Des Moines,
IA
Cobra Make, Engine: SPF 545" stroked 460 - sold
Posts: 239
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Not Ranked
Quote:
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Originally Posted by mjmacqua
Guys,
Just looking for a little insight into what oil most guys are using and what kind of oil pressure you are getting. I have read about zink contents too any opinions.
Looking for type, wt, and pressure at idle warm and under different loads.
I think I may have a problem and want to compare notes.
Mike |
Hi Mike, I use Castrol 20W-50 and note 30 or so idle pressure and generally 55-60 range going down the road. Cold idle is higher. Initially I had a mechanical oil gauge which gave about these same readings, I have since changed to an electric gauge with sensor in the fitting at the driver's side front of the block. I have a remote oil filter and oil cooler setup and have a 20PSI switch out at the remote mount that will turn on a red dash light if oil pressure is ever 20 PSI or lower. It has never come on with the engine running. What are your numbers? |
04-16-2007, 11:22 AM
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CC Member
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Join Date: Mar 2007
Cobra Make, Engine:
Posts: 122
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Not Ranked
If you are running flat tappets you need more zinc in the oil.
I use Rotella.
Quote:
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Originally Posted by mjmacqua
Guys,
Just looking for a little insight into what oil most guys are using and what kind of oil pressure you are getting. I have read about zink contents too any opinions.
Looking for type, wt, and pressure at idle warm and under different loads.
I think I may have a problem and want to compare notes.
Mike
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__________________
DavidinDurango
mostly fords, with "some stuff"
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04-16-2007, 01:30 PM
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Beam Me Up Scottie
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Join Date: Aug 2004
Location: Squantum (part of Quincy),
MA
Cobra Make, Engine: SPF1049 Titanium w/black stripes, 351W with Trick Flow Heads, Tremec 3550
Posts: 7,592
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Not Ranked
Redline 20-50. Pressure between 50 and 60 psi under all conditions.
__________________
Warren
'Liberals are maggots upon the life of this planet and need to get off at the next rotation.' (Jamo 2008)
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04-16-2007, 02:00 PM
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CC Member
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Join Date: Mar 2001
Location: Cinnaminson,
NJ
Cobra Make, Engine: Cobra Fibercraft Bodies 427 S/C, 351W disguised as a 427.
Posts: 391
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Not Ranked
Since I run a flat tappet cam in an early block I run Shell Rotella T 15W-40. That weight gives me 60 lbs. pressure. That stuff has the extra zinc to properly lubricate the cam and lifters. Usually find it at Pep Boys in the gallon plastic can.
__________________
Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
Last edited by SuperHart; 04-16-2007 at 02:03 PM..
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04-16-2007, 02:37 PM
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CC Member
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Join Date: Oct 2006
Location: Long Island,
ny
Cobra Make, Engine: Midstates, 501
Posts: 120
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Not Ranked
Thanks to all.
My pressure seems a bit lower since I switched to 10W30 Syn. I think I am going to go to something a little thicker.
On a side note. I do not have the specs on the CAM (long story). Is there any easy way to tell if it is Flat Tappet with out pulling the whole thing out?
Mike
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