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One of the most frequently asked questions when it comes to mid 2000s Caterpillar engines; Single turbo or “Twin” turbo.While the factory Acert turbochargers are often referred to as “Twins” they are NOT twin turbos. Twin means the same and the two turbos on Acert engines could not be any more different from one another.  Take a look for yourself..The Acert uses a high pressure (primary) turbo and low pressure (atmospheric) turbo. Contrary to popular belief, the high pressure turbo is act …

VOLVO / MACK Holset VGT Turbo InterchangeabilityWe have touched on this topic before, but some things are worth a second look. While Holset has 1000s of part numbers for their VGT turbocharger, I know those 1000s of numbers superseded to only 100s of turbos, and I THINK those 100s of turbos can be consolidated down to 10s of turbos. Taking a step back - Holset has “families” or “series” of turbos. For example, HE300 series turbo, which then further breaks down to an HE341VE, HE351VE, etc - the …

It seems like I have been hearing about this “Monster” factory Detroit turbo for years. Well, I finally figured out what it was and then proceeded to get my hands on one! From what I understand, they come factory on the Detroit Series 60 HK Engines, which is an industrial version of the common road going Series 60 that we all know and love. This engine looks like it could originally be spec’d with up to 665HP with a 2300RPM rev limit!With horsepower like that, it makes sense that the stock tur …

We often get asked about turbo blankets and ceramic coating on our manifolds and turbine housings, so I thought I would take a second to explain what these heat coatings and blankets actually do.First we need to start with the basics properties of gasses and thermal properties. It's common knowledge that things can expand and contract when temperatures change; What's going on in your new turbocharger is no different! On the exhaust side, as the exhaust gas temperature rises, the gasses expand. …

The factory HT60 on the Cummins N14 and 855 engines has a unique flange pattern and abnormal mounting orientation that makes it very difficult to retrofit a more modern upgraded turbocharger.With this in mind, we set out to create an upgrade that was a direct replacement from an installation stand point. Depending on the original spec and horsepower out put, your N15/855 could have had a multitude of different chargers from the factory, we have listed them below. As you can see above, our N14 up …