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> tuna can vs. deep sump vs. Accu sump
jmargush
post Sep 11 2025, 11:37 AM
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Now that I have an oil pressure gauge in car I can see drastic swings in oil pressure while on the autox course.

So this prompts a few questions.

Does the Type IV have an oil system that really isn't adequate for higher G loads and quick direction changes?


Will I see an noticeable difference if i go tuna can sump vs. Deep sump vs. Accu sump?

I understand the Accu sump is likely the way to go but there is also a significant entry cost difference and more involvement on the install.

I hate to spend the money on the easy install of a tuna can if it isn't going to make a noticeable difference and I should have just put the money toward the Accu sump.
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VaccaRabite
post Sep 12 2025, 06:57 AM
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IMO, every 914 that gets driven hard should have a Tuna Can at least. And a quality one at that. And, yes you do need to use CAUTION installing them as you can and will destroy the case if you over torque that retaining bolt.

I prefer a tuna can to a deep sump, as the deep sump can still have oil sloshing away from the pickup.

Dry sump is the best option, but overkill for my needs. I have not AXed in a while, but I never lost pressure on a course with a tuna can.

Zach
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