Billet Turbochargers

A recent forum discussion brought up an old topic of billet, ceramic ball bearing, k04 turbochargers.  An outfit in Australia called Billet turbochargers is a vendor that advertises these k04 replacement chra’s.

The topic discussion had not gone anywhere but the idea of BB chra’s has been something I’ve been interested in so I decided to look into the Billet turbochargers a bit more closely.

The website where the product is advertised is not much to look at.  It has a design feel that matches the copyright date of the site, 2007.  Any business that hasn’t revised the copyright date on their website for a decade creates skepticism in my mind about how savvy the business is.

There is not much information on the site about the k04 suitable centers that is on their Hottest New Product page – this is surprising since the original post to the page was made 5 years ago.

I sent an email to the address given on the website and after a couple of weeks had not heard a reply back.  This was similar to what others had experienced years earlier, apparently the website was no longer actively being supported by the business.

I moved over to Facebook and was able to find a page that the business had established and which contained newer content, thought still quite limited in quantity.  There are seven reviews of the company and products over the past 3 years, another sign that the company is probably not setting the world on fire with its products.

I sent the company a message via Facebook not expecting to hear anything back, asking if they were still in business, to my surprise I did get a reply.  They said they were very busy with expanding here (Australia) and in the U.S.  I don’t think I believe that, but I was out for information about the product line so I started asking questions about the offerings for the 2.7T engine.

The phrase “like pulling teeth” comes to mind.  Slow and spotty responses came back to my questions.  I found out that they apparently offer replacement centers for the K04 series turbo’s and the cost per center is $1250 AUD, the same as what was quoted in the forum discussion 5 years earlier.  A series of questions over the next several days were sent to Billet Turbochargers, to include asking if FB messenger was the preferred way to communicate with them.  No response has been received.

I tried doing some research on forums where the product might be talked about and came across one thread where somebody said they had a Billet Turbocharger product on their VW.  Close enough and better than nothing.  Going and researching the guys discussion it was clear he was located in Australia and was using the turbo’s, but to my disappointment through the course of years worth of posts in a build thread there was not a single datalog, no dyno pulls, and the owner even mentioned that the car had not been dyno’d.  In other words there was zero data about these turbochargers from the owner.

Nothing about this product, other than what it claims to be, is encouraging.  There is an absence of user feedback, the company selling it provides little information or communication, and the turbo centers cost a heckuva lot.  I’ll be sticking with straight BorgWarner Turbo’s for now.

BorgWarner Audi RS6/K04 Turbocharger
BorgWarner RS6/K04

Turbo Concepts Hot Weather Boost Onset

Temperatures today were around 92 degF,  high enough to make some measurements of how the Turbo Concepts Stage 1 turbocharger performs with hot air temperature.

Compared to the last warm weather readings that were made when the air temperature was around 85 degF, the performance is a little more off, but not too badly.

The boost curves that were recorded to generate the chart above are shown below:

Adding this latest data to the compilation of K04 and K04 hybrid data that I have collected produces the chart below:

The data spread for the TC Stg1 turbo’s is wider than the other turbochargers due to the conditions that I have been able to measure them under, a range larger than any of the other K04 based products.

The results between products is unsurprising given the relative dimension of the turochargers that have been measured.

Audi B5 S4