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Discussion Starter · #1 ·
OK as some of you may know, I did a cam change last month. I went from a 270H to a 282S. I used the matching lifters and I also installed a new Edelbrock double roller timing chain and a new timing cover. After I broke in the cam I used the same oil that I always use - Mobil 1 with a puralator oil filter.

With my old cam my oil psi was at 60 psi on cold start up, 50 psi fully warmed up while driving, And 25-30 psi at a hot idle. When I would idle I could tap the throttle and the oil psi would rise instantly.

Now with my new 282S my oil pressure is 55 cold, 38 psi fully warmed up while driving, And 15-20 psi at a hot idle. Now if I am idling at 15 or so and take of and start driving the oil psi is really slow to rise... So my oil psi is alot lower than before, And is really slow to rise
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I have changed the oil and filter since, And same problem. I have checked it with a mechanical guage and got the same results. What is going on here? I am ready to use this motor as a really expensive boat anchor. Any help would be appreciated. Thanks.
 

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I too have the 282S cam and have what seems to be low oil pressure. I initially saw it on the factory gauge, and later added an aftermarket gauge to confirm.

I have heard that oil pressure may be less with a solid cam.

Rule of thumb is supposed to be 10 lbs per 1000 RPM, although you can have less pressure at higher speed.

My engine is fresh so I had nothing to compare to. When cold, I have 60lbs and when the engine gets fully warm I have 20lbs. Because my good gauge is in the engine compartment, I don't know what it is while driving.

When I assembled the engine, the new Scat crank was a little on the tight side of Ford factory specs and my block was brand new and both were checked out at the machine shop. I had new cam bearings installed and was careful during installation plus used lots of lube on the bearings. I spent 3 long days just checking and assembling my engine. I installed a standard volume/pressure oil pump.

I have cut my oil filters open since my build and have found nothing out of the ordinary which helps relieve my initial concern. On my next oil change I am going to use a different brand of oil filter (currently crappy Fram) and use a 10w40 instead of 10w30.
 

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Discussion Starter · #5 ·
I am currently using auto meter sport comp guages, And I am using copper line (for track purposes). Maybe I will remove the line and install some new line incase something is plugged up in there?

It just seems rather odd that this problem first started after I did a cam change. Before that I didn't have a single problem. Thanks.
 

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I could see if you got a slight kink in your oil pressure line while doing the cam/lifter swap, that would restrict flow and thus the rate of pressure change at the gauge.
 

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My sft 289 has about the same psi hot as you describe for your 302 hot. Not a problem. However, my oil pressure will shoot right up with the rpm. I would suspect some of the things mentioned above.
 

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Discussion Starter · #10 ·
Thanks for the help guys, I will try putting on some new copper oil line and see if that helps. However, The only thing different here is that I did a cam swap and then the oil psi problems started. something tells me that this has to do with the cam swap, Because nothing else has changed.

Also, Is it a myth that solid lifters will give you less oil psi then juicu lifters? Thanks once again.
 

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Sounds like there is some extra clearance in the cam bearings. Just .001 to .0015 will make a differance.
For a "quick fix" mabey try and use a high volume pump (not high pressure) and a hardend oil pump shaft. That will bump your oil pressure up a bit to compensate. and if you notice it jump up and then degrade over time then you know you have an issue.
Its not addressing the actual issue but it will help your engine live a little while longer.
 

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A kink in the line shouldn'd matter, as there really isnt any flow through the gauge, instead the entire line is at a steady state, under uniform pressure. I would agree that it would have to do with the cam change, if your pressure was ok before
 
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