Super Street Network

 |   |   |  Basic Turbo Tech: Part 1

Basic Turbo Tech: Part 1

Staff Report
Mar 17, 2004
0405tur_turbotech01_z Photo 1/14   |   Basic Turbo Tech: Part 1

The center cartridge is often taken for granted as much of the attention when it comes to turbochargers is focused on housing sizes and wheel trims. The center section is the "durability center" of a turbo. Lubrication and cooling of the unit happens here and if things go bad, it's game over. There's no doubt that ball-bearing cartridges have been a godsend for turbo enthusiasts. Almost like cheating, tuners are using the ball-bearing design's quick spool-up to negate turbo lag and to run bigger units on smaller applications.

Garrett's dual ball-bearing turbos were originally designed for diesel engines. Diesels were known to produce throttle tip-in smoking. The smoke was the byproduct of a rich condition that occurs after the throttle is opened, but before boost is realized. Response was the goal because diesels don't rev very high. So ball-bearing turbos designed to spool-up quickly were developed that shortened the time between the pedal and the boost, which helped solve the problem. The highly responsive design was perfect for extreme motorsport applications, which eventually led to the HKS/Garrett GT lineup now seen on the street, as well as offerings from Turbonetics and other manufacturers.

In the first of this two-part article, we'll examine the inner workings of the center cartridge to develop a basic understanding of its functions. In the next installment, we'll explore the different types of ball-bearing center sections.

Learn how the center cartridge works as we assemble a conventional journal center section and outline some of the differences between journal bearings and Turbonetics single ball-bearing center sections.

The 270 vs. 360 Dilemma
Many conventional journal- bearing turbos use a 270-degree thrust-bearing washer (at left), while the new breed of conventional and ball-bearing turbos employ 360-degree thrust bearings. The advantages of a 360-degree bearing include a full circle of lubrication, six orifices on the washer instead of three for the 270-degree unit, and an updated pad strategy to better disperse oil where it's needed. Turbonetics uses 360-degree bearings on all of its T04B and T04E turbochargers. There isn't much of a dilemma here; if you have the opportunity to use a 360-degree bearing, jump at it.

By Staff Report
88 Articles

BROWSE CARS BY MARKET

MORE HOW TO

Ditch the rat’s nest; a Honda legend breaks down the path to proper wiring, a crucial part to any build.
RodrezAug 25, 2015
Will this restomod MGB GT project be the coolest thing ec has ever done or will it end in flames and tears?
Ezekiel WheelerAug 25, 2015
New Pioneer decks, speakers, and amp can help reset that audio with an injection of 21st century sound system technology
Bob HernandezAug 20, 2015
JDM tuners DAMD channel British sports car for latest Toyota 86/Scion FR-S kit
Bob HernandezAug 13, 2015
Upgrading our tired and worn clutch for a performance clutch.
Justin FivellaAug 11, 2015

SEARCH ARTICLES BY MAKE/MODEL

Search

SuperStreet Instagram

Does it drive as good as it looks? Yes it does! #superstreet #drivingisbelieving #bmwi8 #azusacanyon

TO TOP