Hi rpm oil starvation

jrb55gh

Can a stock z generate enough g forces in a sustained turn on stock Advan tires to cause high rpm oil starvation?

Jordo!

Pulling far less than 1 G, you'll hit fuel starvation first.

At high enough revs, any oil pump bearing may fail, but I know of no such problem associated with hard cornering in this car.

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jrb55gh

A good general answer to a general question.

How about this specific infrequent but very possible driving event. Imagine your daily driver on some cloverleaf interchange: fuel tank at least 1/2 full, sustained left sweeping turn at around .9 G, 7000 rpm. There probably won't be fuel starvation. The hi rpm will tend to hold oil in the upper part of the engine and lower the oil level in the pan. The G's will push oil to the right side of the oil sump and away from the pickup.

This may seem picky but if an aftermarket oil pan will prevent engine damage in this situation, I want one.

Elmo370z

Dry Sump will solve that problem. Initial cost expensive, but worth it if you plan on tracking the car and sustaining high rpm's

Jordo!

Actually, on a hard right (I think), you will almost definitely see a loss of fueling, even at half a tank -- it's been documented numerous times on here.

Regarding oil, I don't think that has been a problem relevant to the oil pick up on the track -- revving over 7700 RPM has been associated with some issues, but not g's, at least to the best of my knowledge.

The primary oil problems that seem to crop up on the track are all due to oil temp (ECU imposes "limp mode" at ~260* F).

You might try posting/searching through the track forum, but I'm pretty sure no one has managed to blow a motor due to oil starvation (well, other than those who were unlucky enough to get oil burning motors...).

As to a dry sump, I only person I know of one person who did that, and it was to deal with safe rev levels, not g-related oil starve.

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Rusty

How about a baffled oil pan? Like the one I have.

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kenchan

huh, that's cool. has fins too for cooling.

phunk

Lets point out that your pan is not simply baffled, but that it has active baffles!

Big, huge, epic difference. A static baffle will block fluid transfer just as well as it retains it, and in a pumping system a static baffle will only promote pickup starvation rather than cure it as the pickup will deplete the reserve fluid immediately and the baffles will slow the refill.

This is also why designing fixes for fuel system starvation is NOT as easy as everyone thinks.

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Rusty

Yep, there is 4, one-way trap doors in that pan.

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jrb55gh

It appears that the surest non dry sump solution to oil starvation available today would be the GTM pan with extra oil capacity and active baffles. Also the increased surface area of the pan will offer a little extra cooling relative to the stock pan. If the conditions of operation (rpm’s, oil temp) remain the same for the new pan, the oil change interval could be lengthened too.

Thanks for all the inputs to this thread.

For more on oil starvation occurrences go to this thread:

oil starvation problem?

Rusty

Well, the GTM pan doesn't have active baffles. And good luck on getting anything from GTM.

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12nismo

Rusty, where did you get yours from?

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Rusty

My oil pan is from AM Performance, which is no longer in business. I got mine from Shamu when he was rebuilding his engine, and went with a dry sump system. Think there was only about 20 of the oil pans made.

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jwick

Too bad it's no longer available

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phunk

Rusty, did you install it yet?

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