[3nigma]

Originally Posted by Cannonfodda101

Ok so lets put it this way why do you need to add more grease if it is sealed? the grease doesnt cool it infact it turns to oil when hot and is just the lubricant for the turbo. you will need to put more grease in because its burning it off and probably pushing it past seals when hot

So I'm not an expert or related to the company in any way but a quick google yielded this explanation:

Waterless, or more accurately, oilless air-cooled turbochargers (popularized by companies like Comp Turbo), cool themselves primarily through conduction and radiation rather than relying on engine oil or coolant. [1, 2, 3, 4, 5]
These units are highly regarded for mid-mount and low-mount applications (including rear-mount) because they eliminate the need for gravity-drained oil lines, simplifying installation and preventing oil scavenge pump failures. [6, 7, 8, 9, 10]
How Waterless (Oilless Air-Cooled) Turbos Cool
Instead of water jackets or oil feed lines, these turbos use a specialized design:

• Proprietary Grease Lubrication: The center cartridge utilizes a sealed chamber with a specialized, high-temperature, non-channeling grease to lubricate the bearings.
• Air-Cooled Housing: The billet aluminum center housing is designed with air cooling fins to dissipate heat. Some designs even feature internal air passages that draw air from behind the compressor wheel to cool the internals.
• No Oil/Water Required: Because they are self-contained, there is no risk of "oil coking" (burnt oil) in the center section after shutdown.
• Maintenance: The bearings are serviced through a Zerk fitting, requiring a few pumps of specialized grease every 3,000 miles (approx.) to keep them operating effectively. [1, 3, 8, 12, 13]

This video explains the difference between air-cooled, oil-cooled, and water-cooled turbos:
Are They Good for Mid/Low Mounts?
Yes, they are considered ideal for these setups due to the elimination of common, frustrating, and often fatal installation issues. [2, 3]
This video shows an air-cooled turbocharger being installed to solve oil issues:
Why They Are Good for Mid/Low Mounts:

• No Oil Scavenge Pump Needed: Because there is no oil drain line to gravity-feed back to the engine, you don't need a scavenge pump to pull oil out of a low-mounted turbo, removing a common failure point.
• Flexible Orientation: These turbos can be mounted in any orientation (vertically, horizontally) without worrying about oil drain gravity issues.
• Simple Plumbing: You only need to hook up exhaust and intake piping, reducing the complexity of the installation.
• Ideal for Remote Locations: Because they do not need engine oil, they work exceptionally well in mid-mount or rear-mount setups. [1, 7, 8, 14, 15, 16]

Considerations & Potential Drawbacks:

• Cost of Grease: The specialized grease can be expensive, and maintenance must be performed regularly.
• Bearing Longevity: While designed to be durable, high-load, continuous track use may require stricter maintenance than conventional water-cooled turbos.
• Heat Management: While they don't need oil to cool, the unit itself still gets extremely hot. Proper airflow, or even additional cooling shrouds, might be necessary in cramped, low-mount positions. [1, 5, 8, 17, 18]

Note: There are also oilless, water-cooled turbos available that still use a grease-packed bearing but have water ports for additional thermal stability. [1]

AI responses may include mistakes.

[1]

[2]

[3] https://www.turbokits.com/turbocharg...ed-turbos.html
[4] https://arashidynamics.com/blogs/blo...a-turbocharger
[5] https://www.tiktok.com/@stangry5.0/v...59232477646123
[6]

[7] https://www.facebook.com/groups/5518...1451737654450/
[8] https://www.facebook.com/groups/4309...1077414337733/
[9] https://www.bobvila.com/interior/tur...lit-heat-pump/
[10] https://www.turbokits.com/turbocharg...ed-turbos.html
[11] https://turbobricks.com/index.php?th...ed-turbos.132/
[12]

[13]

[14] https://www.tiktok.com/@stangry5.0/v...87096803364139
[15] https://www.ft86club.com/forums/show....php?p=2334884
[16] https://www.ft86club.com/forums/show....php?p=2334884
[17] https://www.garrettmotion.com/racing...or-your-turbo/
[18] https://www.reddit.com/r/EngineBuild..._cooled_turbo/