Chrishbsbll

iTrader: (2)

My car is running a ported ls6 oil pump. I just put the head back on and new valve covers with a filler hole that i out a valve cover breather on. My problem is at WOT the oil pressure on the dash goes to 70psi. Is this normal or am i at risk of spinning a bearing?

supergt99

iTrader: (1)

At WOT it sounds ok to me

fd3sls2

iTrader: (3)

I wouldn't put much faith in the dash gauge.....not very accurate....get an aftermatket pressure gauge... assuming its truely 70psi... like supergt99 stated.....sounds ok

JPH

iTrader: (2)

Sounds right.

KCS

iTrader: (20)

Do you know what color the spring is in your pump? It should be either a red (high pressure) or blue (low pressure). Hopefully there's either a red spring or a shimmed blue because that oil pressure is pretty high.

Gray86hatch

iTrader: (83)

It is fine. Mine makes over 100 at wot. Oil pressure and volume is what keeps these things alive.

Tim

KCS

iTrader: (20)

Pressure and volume are pretty much opposites. You only need enough pressure to supply enough volume, and pressure doesn't contribute to maintaining the hydrodynamic wedge keeping the bearing and journal from meeting. Excessive pressure is just making the pump work harder and causes parasitic loss.

Gray86hatch

iTrader: (83)

If you don't have a big leak when the volume goes up so does the pressure.

My pump moves more GPM than the big melling. This pump has been proven to fix problems that guys were having in the Tx mile with burning up rods and mains. NHRA super stockers were also having issues.

I will take a little loss in power and have the engine live any day.

Tim

KCS

iTrader: (20)

Negative on the pressure and volume relationship, they are inversely proportional. As pressure increases, flow volume decreases for a given area. Physics 101.

As far as your pump, I don't know what you are using but the Katech LS7 pump in the engine I built kept it alive for the TX Mile, and WOT is maybe 50psi and 30ish at idle. Whatever tricks were done to your pump likely have more to do with resisting cavitation than increasing pressure.

therabidweasel

iTrader: (5)

So at 0 pressure I have infinite volume? I think you are considering cross section as a variable...because my pressure gauge goes up when I step on the gas...which turns the pump faster...which pumps more oil through the same area...but I only took physics 0.01.

soundengineer

iTrader: (16)

what pump are you running tim?

Gray86hatch

iTrader: (83)

Shumanns thru Car Shop Inc.

KCS

iTrader: (20)

Well if you have no pressure, you're going to flow the maximum volume for that pump as there is no resistance.

raysadude

iTrader: (11)

So, is there such thing as too much oil pressure? Mine goes up to 80 on wot.

And can u overtightened the sensor and messed up the reading?

soundengineer

iTrader: (16)

cant distort readings from it, but you can break the sensor and then it will have issues or leak oil from the sensor



there is a point where you can get too much pressure...but it takes a bit to get there. 80~100 is not too high...
if you were seeing 150psi... I would be worried.

typically the issues you will see from High pressure is usually blowing out the oil filter seal or blowing open the oil filter all together...

raysadude

iTrader: (11)

I see, thanks man.

yes, that's what I'm afraid of, too much pressure then you'd start blowing out gaskets and seals.

And it just so happened that when I did my heads swap I broke the opsu(my oil pressure was always around 40ish on idle) now with the new opsu, it always floating around 60