oil starvation problem?

martin82 · 03-16-2014, 12:47 PM

Only way to know is oil pressure on track but don't think it will be a problem.

Mike · 03-16-2014, 07:11 PM

once the engine is started and the normal oil pressure is built up, the distance of travel is pretty much irrelevant. Hydraulic pressure is a constant across an entire system.

Megan370z · 03-16-2014, 07:41 PM

Quote:

Originally Posted by Mike

once the engine is started and the normal oil pressure is built up, the distance of travel is pretty much irrelevant. Hydraulic pressure is a constant across an entire system.

I hate doing this and since my hydraulic course was taken years ago, I will try to make it short.

there is in fact an hydraulic pressure loss/gain in any hydraulic system
the pump & regulator/restrictor has to work together to maintain a certain level of pressure it was set. If you add an oil cooler for example you are adding restriction to the system which will raise the pressure and other adverse effect.

The pump isn't making the pressure but pumping the oil, pressure is made by the effect of restriction.
so to answer the guy asking if the stock oil pump is enough,,, I would say yes but the restrictor could potentially be adjusted if it was possible.

one last thing; this is why there was more pressure showing on the pressure gauge on my old 350z after adding an oil cooler higher than it use to. but its not enough to greatly affect the engine.

Mike · 03-17-2014, 10:44 AM

Quote:

Originally Posted by Megan370z

I hate doing this and since my hydraulic course was taken years ago, I will try to make it short.

there is in fact an hydraulic pressure loss/gain in any hydraulic system
the pump & regulator/restrictor has to work together to maintain a certain level of pressure it was set. If you add an oil cooler for example you are adding restriction to the system which will raise the pressure and other adverse effect.

The pump isn't making the pressure but pumping the oil, pressure is made by the effect of restriction.
so to answer the guy asking if the stock oil pump is enough,,, I would say yes but the restrictor could potentially be adjusted if it was possible.

one last thing; this is why there was more pressure showing on the pressure gauge on my old 350z after adding an oil cooler higher than it use to. but its not enough to greatly affect the engine.

probably more right than I, its probably been longer since my courses, but it should be a negligible amount.

cv129 · 03-16-2014, 07:19 PM

Cool, thanks

DR_ · 03-17-2014, 11:18 AM

I think part of the trick in sizing an oil cooler setup is to get the pressure to behave like stock. If you see a PSI increase after installing an oil cooler you know it is restricting and if you see a PSI decrease you know it is oversized.
If you have the ability to increase PSI, like shimming the oil pump, you can go oversized and still get back to the stock PSI.

wstar · 03-17-2014, 11:27 AM

^ Would it even be possible for the mere installation of an oil cooler to actually drop the PSI? I'd think (well, assuming we're talking equal oil temps in both cases) that it can't have negative restriction and thus can't do that, right? Or do you mean with the new difference in temperatures taken into account as well?

EDIT: hmm, even then, colder oil would be higher PSI, not lower. What am I missing here?

jrb55gh · 06-22-2014, 11:21 PM

Hi rpm oil starvation with stock tires?

I have read this entire, very informative thread. Thanks for sharing your experiences.

I don’t plan to track my stock 370z 7AT, but members here with track experience certainly have knowledge to share that could help save my engine.

There are many opportunities to corner at the traction limit of the stock street tires on the twisty roads of East Texas. Using the paddle shifters makes it easy to keep the rpm in the meat of the power band, 4500-7000. Are the stock oil pan and oil pickup sufficient to keep oil flowing without oil starvation under these conditions? If not, would an oil pan spacer be enough to keep oil covering the pickup?

03-16-2014, 07:11 PM	#2 (permalink)
Mike The370Z.com Sponsor Join Date: Jun 2009 Location: Loganville, GA Posts: 5,944 Drives: 370z Rep Power: 2187	once the engine is started and the normal oil pressure is built up, the distance of travel is pretty much irrelevant. Hydraulic pressure is a constant across an entire system. synolimit and KapitalZ like this. __________________ NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z Porsche: 93 968 / 23 Macan GTS / 93 968

03-16-2014, 07:19 PM	#5 (permalink)
cv129 A True Z Fanatic Join Date: Jul 2011 Location: Dallas, TX Posts: 3,272 Drives: 09 Nismo, 16 Nismo Rep Power: 163996	Cool, thanks __________________ Setrab \| RE-71 \| SPL \| JRZ \| Nismo \| ARK \| Whiteline \| RacingBrake \| CJM Oil Pan \| Ti shield

03-17-2014, 11:27 AM	#7 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	^ Would it even be possible for the mere installation of an oil cooler to actually drop the PSI? I'd think (well, assuming we're talking equal oil temps in both cases) that it can't have negative restriction and thus can't do that, right? Or do you mean with the new difference in temperatures taken into account as well? EDIT: hmm, even then, colder oil would be higher PSI, not lower. What am I missing here? __________________ 7AT Track Car! Journal thread / Car setup details Last edited by wstar; 03-17-2014 at 11:30 AM.

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03-16-2014, 12:47 PM	#1 (permalink)
martin82 A True Z Fanatic Join Date: Nov 2011 Location: los angeles Posts: 2,636 Drives: 12 Nissan 370Z MB M6 Rep Power: 21	Only way to know is oil pressure on track but don't think it will be a problem.

03-17-2014, 11:18 AM	#6 (permalink)
DR_ Track Member Join Date: Jul 2009 Location: Dallas Posts: 981 Drives: Touring/Sport M6 PG Rep Power: 18	I think part of the trick in sizing an oil cooler setup is to get the pressure to behave like stock. If you see a PSI increase after installing an oil cooler you know it is restricting and if you see a PSI decrease you know it is oversized. If you have the ability to increase PSI, like shimming the oil pump, you can go oversized and still get back to the stock PSI.

06-22-2014, 11:21 PM	#8 (permalink)
jrb55gh Base Member Join Date: Mar 2013 Location: DFW Texas Posts: 149 Drives: '13 370z black 7AT Rep Power: 14	Hi rpm oil starvation with stock tires? I have read this entire, very informative thread. Thanks for sharing your experiences. I don’t plan to track my stock 370z 7AT, but members here with track experience certainly have knowledge to share that could help save my engine. There are many opportunities to corner at the traction limit of the stock street tires on the twisty roads of East Texas. Using the paddle shifters makes it easy to keep the rpm in the meat of the power band, 4500-7000. Are the stock oil pan and oil pickup sufficient to keep oil flowing without oil starvation under these conditions? If not, would an oil pan spacer be enough to keep oil covering the pickup?