Author Topic: oil pressure/water temp. Does this sound about normal?  (Read 1951 times)

Offline Chryco Psycho

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Re: oil pressure/water temp. Does this sound about normal?
« Reply #15 on: October 17, 2008 - 11:51:52 AM »
or do extended high rpm on the highway , personally I would just use the HP pump

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Offline 71chally416

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Re: oil pressure/water temp. Does this sound about normal?
« Reply #16 on: October 17, 2008 - 12:17:33 PM »
 :iagree:

As for the stock BB pans, IMO they are the suck. For a big 440 you need more capacity in the sump and some baffles to keep the oil from climbing up the front and back when you take off and stop. I made my own sumps when I ran the BB motors because the ones that were available back then all hung too low under the car.  I LOVE the Stef's pan I bought for the 416. It has a trap door and a built in windage tray made out of aluminum screen and it required NO modification to the K-frame at all to clear. Perfect fit! For what I paid I couldn't see going through all the trouble of fabricating one. And they're made right here in NJ.  :thumbsup:


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Offline Moparal

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Re: oil pressure/water temp. Does this sound about normal?
« Reply #17 on: October 17, 2008 - 12:24:17 PM »
My 6pk pan has the baffles and holds 6 qts. All the stock stuff. I'm pretty much leaving everything stock. I do have other cars to play with and know what to use on them. One has dual swivel pickups on a dragster pan. The 60 ft in that car is better than a 1.18 and holds up very good. Thanks for your info

Offline moper

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Re: oil pressure/water temp. Does this sound about normal?
« Reply #18 on: October 28, 2008 - 12:01:50 PM »
Al, as CP said... if your cl;earances are good, your idle pressure with the HV pump would be very high. In your case, it is. Because the larger volume per rotation of the HV pump is forcing a ton of oil thru the bearings. Pressure is resistance to flow. Not flow itself. The reason the pressure goes to 80-85psi and stops dead from 2K and up, is because teh pump has reached it's maximum output THRU YOUR SYSTEM and the breaings don't have the room for the excess. That means teh pump pumps like mad, and the excess is forced thru a spring loaded bypass and back to the pan. All you did was use up horsepower power to force it thru there, and ad heat trying to compress it. Takea  wrnech some day and preoil the engine by hand, you'll see how much power it takes...lol. The idle rpessure should be lower, and should immediately come up, even with a stock pump, because teh output is more than enough for the oil sytem clearances. By running the HP model, it pumps the same amount as a stock pump, but at higher rpms, it develops more pressure. I modify my oil systems to be much larger in volume, but I run a stock pump. The result is typical max pressures in the 55-60psi range, but at 30% more oil available at the bearings than if the pressures were 85psi and stock passages. And that's with stock displacement pumps.