Dry sump leakdown prevention? |
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Dry sump leakdown prevention? |
gnomefabtech |
Mar 25 2024, 11:02 AM
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#1
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Member Group: Members Posts: 111 Joined: 27-December 22 From: Los Angeles Member No.: 27,063 Region Association: None |
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. |
arbitrary |
Mar 28 2024, 07:46 AM
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#2
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Member Group: Members Posts: 81 Joined: 25-April 21 From: UK Member No.: 25,475 Region Association: None |
I have a Hayabusa engine in a Caterham; it uses a dry sump system from SBD Motorsports. https://sbdmotorsport.co.uk/ They recommend that the bottom of the dry sump tank is at the same height as the bottom of the sump.
I used to have a 993tt - they would often have oil back flow issues. The solution had multiple facets: - the correct Porsche oil filter that had a non-return valve built in - a pressure valve at the oil feed line going into the turbo (pretty sure it was a 996tt part) that would only open under a slight pressure (greater than the head provided by the dry sump tank) - the highest viscosity oil allowed - scavenge lines (developed by Ruf?) that had a raised section acting as an anti-siphon But not sure any of those will help your situation… I’m guessing your turbo is a gravity drain back to the engine sump? Can you connect it via a T fitting to the scavenge side of the pump instead with a raised section like Ruf did? Please do keep posting - I like Hayabusa engines and I like 914s. (IMG:style_emoticons/default/biggrin.gif) |
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