google-site-verification: google84a60c2b4e8ac2e3.html
  Loading... Please wait...


C15 Acert Compound Turbos

Posted by

The C15 Acert went through a few different variations from 2004-2010 during their production time.  First there was the BXS, then MXS, and NXS, and then finally the SDP.

While each version was slightly altered from the last, one thing that remained constant was that the Acert came with two turbos - a high pressure turbo and a low pressure turbo.  Often times people refer to the C15 Acert as a "Twin Turbo", but these turbos are NOT the same.  The high pressure builds boost right off idle, where as the low pressure turbo is used to make power in the top of the RPM range.  The turbos were designed to work in unison so as to eliminate turbo lag.

(High Pressure Turbo Pictured Below)

Unfortunately, these turbos are prone to failure.  One of the leading causes of failure is oil contamination.  The turbo is extremely sensitive to inconsistencies in oil.  The BXS, MSX, and NXS turbos are journal bearing, which means that the turbine shaft has brass bushings (the journal bearing) that rides on a film of oil.  If this oil has any debris or excessive soot content, the contact patch will become compromised and the turbo will ultimately implode on itself.  This is illustrated by excessive shaft play that can lead to losing oil, low power, and other assorted issues. 

(Low Pressure Turbo Pictured Below)

The SDP C15 Acert has one benefit over its older siblings, this engine comes with BALL BEARING turbos.  These units are much more sophisticated as ball bearing CHRAs are know to spin much more efficiently, thus achieving target boost levels quickly with less turbo lag.  The downside here is that replacements units are MUCH more expensive then journal bearing variants.  

(Example of Ball Bearing Setup in a Turbo)

Image result for ball bearing CHRA

The high pressure is normally the first to go as the shaft spins at a great rate because the turbo is essentially smaller.  The low pressure turbo is much larger and spins at a slower rate of speed (compared to the high pressure unit).  While we recommend replacing these turbos at the same time, you can simply replace the failed unit and continue to run the other if you have no reason to believe it is compromised.  

If you are looking for a NEW - Assembled in the USA - High Pressure C15 Turbo, check out the link below:

If you are looking for a NEW- Assembled in the USA - Low Pressure C15 Turbo, check out the link below:

Replacing Porsche Cayenne 957TT Crank Position Sensor

Recently the family hauler (2008 Porsche Cayenne Turbo), started doing some strange things - (Long crank time, random stalling, going into limp mode), it finally threw a check engine light and the code was for the crank position sensor.  After doing some reading online for other models (955TT, 957S) and getting some conflicting information on [...]

Read More »

Soul Performance Products | Lamborghini Huracan Performante Titanium Race Exhaust System

So you bought one of the best Lamborghini's in existence, the Huracan Performante - but you want to take things to the next level.  Would you like to shed even more weight and turn the sound level up to 11?  Look no further then the Soul Performance Products Titanium Race Exhaust.On a car that was deigned [...]

Read More »

​Maxxforce 7 Turbocharger Failure – Common Problems

Maxxforce 7 Turbocharger Failure – Common ProblemsWhile turbo failure on any vehicle is enevitable after many miles and years of service, the Maxxforce 7 has unique issues that cause turbo failure more often than other engines. The biggest culprits behind a failed turbo on a Maxxforce 7 engine are EGR related issues, and oil dilution. EGR Issues Soot re-entering the [...]

Read More »

​Cummins ISX Turbo Conversions - VNT Delete, Single Geometry Turbocharger Upgrade

Cummins ISX Turbo Conversions - VNT Delete, Single Geometry Turbocharger UpgradeMany customer’s are plagued by the variable geometry turbochargers found on Cummins ISX engines. The actuators often fail and the variable vanes also become packed with soot, leaving you stranded on the side of the road - losing time and money. Fortunately, there is [...]

Read More »

Where do you put your phone in your Porsche?

Where do you put your phone in your Porsche?Not to sound like a bad infomercial, but how often do you fumble with your phone in your Porsche because there is no good place to put it? Those days are OVER. Check out these phone mounts from RENNLINE. They are model specific for [...]

Read More »

​Cantrell Motorsports 981/991 & GT4/GT3 Porsche Carbon Full Bucket Seat Sub-Belt Mount

Cantrell Motorsports 981/991 Porsche Carbon Full Bucket Seat Sub-Belt MountLooking to install harnesses in your GT4, 991 GT3, 991 Carrera, or 981 Boxster / Cayman? Read on..Assuming you have OEM Carbon buckets, this is the cleanest and easiest way to mount the lap belt for your racing harnesses.Check out a quick photo sequence below [...]

Read More »

Porsche 981 Cat Back Exhaust Shoot Out

Today we are going to look at 3 popular exhaust systems for the Porsche 981 Boxster / Cayman cars.  Each of the systems we are going to talk about are 100% bolt on - no cutting or welding required.  None of these exhaust upgrades require an ECU tune, and will not cause a check engine [...]

Read More »

​Why You Should Install Headers on Your Porsche 981

Why You Should Install Headers on Your Porsche 981The “go-to” modification for any 981 Boxster / Cayman (2012-2016) is a set of headers. I say this for 3 main reasons: 1 - Increased Power2 - Enhanced Exhaust Tone 3 - Ease of InstallationIncreased power and sound will vary depending on your choice of headers. [...]

Read More »

Upgraded Turbo for CAT C15

Recently we’ve had an influx of calls and questions about turbo upgrades for C15 Caterpillars. We would like to take a second to talk about the upgrades available and help you decide which one is best for you.Before we jump into specifics on each turbo, check out the chart below – notice the difference sizing and ultimately pick [...]

Read More »