Dry sump leakdown prevention? Options

[gnomefabtech]

Hello!

So I'm running a dry-sump system on my 'teen and it's all great except if the car sits for a few days the oil in the tank slowly fills the motor. This wouldn't be a big deal except it floods the turbo and then there's smoke. So much smoke.

Does anyone have experience using a low cracking pressure check valve to hold the oil in the tank until the car is running? I see a selection of these on McMaster but I'm understandably nervous about restricting the flow into the engine from the tank. It's a -12 an line coming out of the tank. What did Porsche do about this on their dry-sump systems?

I'm running a Hayabusa engine (build thread to follow) so it's a pretty unconventional build but the oiling thing is common to all dry-sumps.

Thanks for answering these questions.

[yeahmag]

I use a quarter turn valve at the tank as well.

[stownsen914]

Depending on where the tank is mounted and how the car is used, there is another option. If the tank is front mounted, you can store the car jacked in the rear (or rear tires rolled onto a couple boards to elevate). This puts the engine higher than the tank, and keeps more of the oil in the tank. For frequent use it might be inconvenient, but I've done the above for 911 and 914 racecars and it works like a charm.

I'm not keen on putting something in the oil feed line to my motor. Too easy to forget, or have it fail, and trash the motor almost instantly.

[ClayPerrine]

I'm not keen on putting something in the oil feed line to my motor. Too easy to forget, or have it fail, and trash the motor almost instantly.

(IMG:style_emoticons/default/agree.gif)

I actually tried a Rothsport check valve on my 4.0L motor. It would not allow oil to pass through it. ZERO oil pressure. The guys at Rothsport worked with me and they could not figure out why it didn't work. So I gutted it, and eventually put in a new line without the check valve.

Not trashing Rothsport. They supported it and I will never asked for a refund. But it just didn't work for me, and I can't risk my expensive motor for it.