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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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GregAmy
post Sep 11 2025, 08:02 PM
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QUOTE(jmargush @ Sep 11 2025, 12:37 PM) *
Does the Type IV have an oil system that really isn't adequate for higher G loads and quick direction changes?

Yes. My 914 road racer was built around 1999, right about when Hoosier started getting sticky tires, and the previous owner kept popping engines due to low oil pressure. He tried tuna cans, bigger sumps and still had failures so he finally gave up because the regs did not allow him a proper fix...which was a dry sump system.

When I got the car it was the first thing I did (while rebuilding the engine). I use this pump:

https://www.cbperformance.com/product-p/1745cl.htm

I use a Canton oil tank up front (it already had a front-mounted oil cooler). But for general autocross and street use I suggest you could use a 914/6 tank in the stock location.

As for Accusumps, here's my thoughts on them:

https://tgadrivel.blogspot.com/2024/05/on-accusumps.html

For any kind of competition on sticky tires, I strongly recommend going dry sump. - GA
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jmargush
post Sep 12 2025, 05:19 AM
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QUOTE(GregAmy @ Sep 11 2025, 07:02 PM) *

QUOTE(jmargush @ Sep 11 2025, 12:37 PM) *
Does the Type IV have an oil system that really isn't adequate for higher G loads and quick direction changes?

Yes. My 914 road racer was built around 1999, right about when Hoosier started getting sticky tires, and the previous owner kept popping engines due to low oil pressure. He tried tuna cans, bigger sumps and still had failures so he finally gave up because the regs did not allow him a proper fix...which was a dry sump system.

When I got the car it was the first thing I did (while rebuilding the engine). I use this pump:

https://www.cbperformance.com/product-p/1745cl.htm

I use a Canton oil tank up front (it already had a front-mounted oil cooler). But for general autocross and street use I suggest you could use a 914/6 tank in the stock location.

As for Accusumps, here's my thoughts on them:

https://tgadrivel.blogspot.com/2024/05/on-accusumps.html

For any kind of competition on sticky tires, I strongly recommend going dry sump. - GA


Greg,

looks like some good reading I'll check it out.

Does the dry sump get plumbed in with a oil filter adapter block?

I assume guys like Chris Foley and Len Hoffman are running a dry sump?
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jd74914
post Sep 12 2025, 06:30 AM
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QUOTE(jmargush @ Sep 12 2025, 06:19 AM) *

I assume guys like Chris Foley and Len Hoffman are running a dry sump?

Yes, they all run dry sumps.
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