Oil pressure with the Kaase pump?

I'm just running in my rebuilt 521 with a new Kaase oil pump. I've noticed it runs quite low pressure at idle or low rpm's(about 25-40psi). Runs around 45-50 at cruising rpm's.
Just wondering if this is normal?
Engine has coated rod, main and cam bearings if that makes any difference.

Interesting Mike, about to use a kaase pump soon myself. Keen to hear more .

what clearances are you running?

I'd bet it's a bearing clearance issue. I run the Kaase pump in my 552 and see 40psi hot idle, 60 cruise and 80 on a pass.

the Coug wrote:what clearances are you running?

Don't know the clearances myself but the shop that rebuilt the engine would have made sure they were spot on.

I'll to drive it a bit more and see what it does at higher revs. It used to have a HV Melling which sat around the 50-60 mark.

Your oil pressure is very much a function of your bearing clearances, lifter to lifter bore clearances and etc. It is ALSO a function of the viscosity of the oil that you are running. You can "adjust" it by changing the weight of the oil that you're using. The old rule of thumb is 10 - 11 lbs per thousand rpm that the engine is turning.

Hope this helps,
Charlie

The oil that's in it is the break in oil which is "Joe Gibbs BR" break in oil. I've run it for maybe 2 hours all up plus there was the dyno time.
I'll be running the Joe Gibbs HR-1 (15/50) when it gets delivered. I wonder if that will make any difference.
I use to run 20/50 so I may go back to that if the new JG stuff doesn't do something.

i looked today when i started mine for the first time this year and had 80psi cold at 1200rpm idle.after it got warm it was about 60 but went back to 80 when i touch the throttle.

I run Mobil 1 10/30 full syn and it holds 75 all the time, I see no need to run grease in my engine just more friction also the one thing People don't understand is anything 460 or bigger needs a windage tray Period the crank will pick up oil and keep it in the rotating assembly.....thus dropping oil PSI

fat64 wrote:The oil that's in it is the break in oil which is "Joe Gibbs BR" break in oil. I've run it for maybe 2 hours all up plus there was the dyno time.
I'll be running the Joe Gibbs HR-1 (15/50) when it gets delivered. I wonder if that will make any difference.
I use to run 20/50 so I may go back to that if the new JG stuff doesn't do something.

I know when I had the brake in oil in my 552 before I changed it hot it would go down to 40 at idle but would hit 75 with just a touch of the gas. Now with the 20w50 val racing oil it sit at 60 idling at 900rpm and 75 with I touch the gas when it hot. I am running a melling hv pump with standard pressure the Kaase pump only reason nobody had them in stock and he was waiting for castings to be made.

the Coug wrote:also the one thing People don't understand is anything 460 or bigger needs a windage tray Period the crank will pick up oil and keep it in the rotating assembly.....thus dropping oil PSI

That is a good point. Mike did you work out the oil level with that sump? I have done the volume and measurements . 4" deep gives you 8 litres in the pan . It does get close to the crank but should be under the windage tray when running . Just a thought anyway .

Yep, Barbagallo sorted that out when they welded in the tube for the new dipstick. Pan has windage tray ect.

I'm going to change the oil and filter today and see what happens.

Changed the oil & filter and took it for a drive. Now idles hot at 30 and goes straight to 60 when you touch the throttle.
Starts up at 80 from cold.

It is still running hotter than it did before. Now sits around 200*. Used to sit around 185-190*. Don't know whether that's because it's still fairly new or what. It is still damn hot up here at the moment. 30*c and humid as. Wish our winter would hurry up and arrive.

What oil + filter?

The Joe Gibbs stuff hasn't arrived so I stuck in Castrol Edge 25/50 (same oil I used to run in it) and put on a new Wix racing filter.

More worried about the temp now. Wondering if the thermostat may not be working or opening properly. It's the same one that was in it before.
Might pull it out and have a look on the weekend. It's about 5 or 6 years old. 185* Hi flow from memory.

Turns out the timing was a little off. Only advancing to 26*. Moved the dizzy to the right place and it runs at 180-185*f like it used to.
I've got to do the mixture screws with the vac gauge now. It's not idling very well in gear.