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hey,

I just put in a set of aftermarket gauges, one being an oil pressure gauge. I was wondering what sort of oil pressure you guys have after driving for around 30 minutes and the engine at its make operating temp at an idle speed. I just put new rings and berings in the engine and the clearances were all good. Im also using a toga hv oil pump, not sure if this is my problem with low oil pres or not.

-when i start my car on a colder day the pressure is up at around 75psi, the drops as the engine warms up. After around 30 minutes of driving the pressure is at around 30 psi when your moving but when the engine drops to an idle the pressure drops darastically to around 10 psi. Is that what you people are experiencing, or am i just paranoid about seizing my new engine lol.

-Ryan

I cant remeber exactly but i think pat gets about 60psi of pressure on his ZE but dont quote me on that, i'm still trying to figure out what fitting is needed to tap into the oil line

I'm getting about 60-70 at WOT and 30 at idle. Stock oil pump, ZE.

I am getting about 15 psi at idle, about high 40's on the highway, and about 60 psi toward redline. Thats on a pretty stock k8. I thought my numbers were low but i have not had any problems with my k8 and have been getting these readings for a couple months now since i put my gauge in.

Nate

hmm maybe i have an internal engine problem, but i rebuilt the engine, and its not running bad or anything. Guess i'll just drive it and see what happens. Before i put the gauge in the idiot light never came on and i was drivin around for like 2 months after the rebuild. So it must be good, just in the lower range.

Are you using a mechanical/fluid or electronic guage? If fluid make sure the line is run nice and smooth. No sharp bends or creases, all swooping bends. I really shouldn't have run a fluid guage, but did and the running of the line made a difference in the readings.

Right out of the online manual, it says at operating temerature:

1000 rpm 28 psi
3000 rpm 49-71 psi



Nate

true but thats on a k8 his is a klde and pats is a ze difference in compression maybe?

Mnemonic wrote:true but thats on a k8 his is a klde and pats is a ze difference in compression maybe?

compression won't affect this!

ryan_Fuerte wrote:hey,

I just put in a set of aftermarket gauges, one being an oil pressure gauge. I was wondering what sort of oil pressure you guys have after driving for around 30 minutes and the engine at its make operating temp at an idle speed. I just put new rings and berings in the engine and the clearances were all good. Im also using a toga hv oil pump, not sure if this is my problem with low oil pres or not.

-when i start my car on a colder day the pressure is up at around 75psi, the drops as the engine warms up. After around 30 minutes of driving the pressure is at around 30 psi when your moving but when the engine drops to an idle the pressure drops darastically to around 10 psi. Is that what you people are experiencing, or am i just paranoid about seizing my new engine lol.

-Ryan

The Toga HV pump's have a bit of a bad reputation im afraid, and is not
a product id personally recommend or use either.

I have a stock pump with the releif valve shim 1.5mm

Idle 35pis
cruise 80psi
Full noise 130psi Autometer Gauge Carbon Fiber Serise.

i doubt it really being the oil pump, but i could be wrong. Because all the oil pump is doing is creating flow, and the clearances between bearings makes the pressure. I checks the gear clearances in the pump and it was all good, before i put it on.

I have 2 oem pumps, maybe i should shim the relief valve and see what that gets me.

I also found out that a rule of thumb is 10psi per 1000rpm, meaning my low pressure at idle is alright, but i would like to see higher myself.

I just rebuilt a KLZE and put both gadge and light sender unit. I'm getting 20, 22 on the cheap gadge(iquus mechanical) and the sender unit is 18psi (autometer) and once in a while the light is flashing at idle. We just ran the engine for the first time last week-end for about 1 hr on the racing track and nothing wrong happen and situation has not change (stock oil pump from old engine)

yah its weird it boggles my mind, it shouldnt be that low on a fresh rebuild, its about time to change my oil, i might do that and see how it turns out after that.

-Ryan

Make sure you are using an oil grade adequate for what you're doing with the car and the weather temperature where you live. Even if (theoricaly) oil grade 0W40 and 20W40 are supposed to be the same, a lot of people feel that there is a difference in pressure when hot even if both are 40. Same thing goes for synthetic oil and regular oil, even if they are the same grade, it can make a difference.

Just make sure you know what you put in there for your own needs.

Yah i just changed the oil, im running castrol gtx 10w30. It brought the oil pressure up a tad. It looks like its still around 10psi when idling around 600rpm. At cruising speed it is about 35-40 now. Isnt i Toga high volume oil pump, create more flow with less pressure??[/quote]