Here, the oil pump is being...
Here, the oil pump is being spun up manually to make sure the oil filter is properly filled with oil and any air is properly purged from the system.
And that brings us to what we think may be the most interesting factor when it comes to using PurePower's filters in racing: The ability to quickly clean and reuse the filter media also makes this style of filter easy to break down for inspection. One of the best ways to diagnose engine problems is to inspect what (if any) materials are being shed off the engine components and are being picked up by the oil. Copper-colored debris, for example, usually means bearing problems. Aluminum can be parts of the piston flaking off from detonation. Steel can mean a whole world of things, and none of them are good.
That's why engine builders usually have an Oberg-style filter as part of their engine dyno setup. Obergs are easy to check, clean, and return to service, but they aren't generally available on wet-sump engines. If you want to check a filter, you normally had to cut the steel canister apart and pull out the filter material. This, of course, is a messy task, as well as time consuming so it isn't normally done at the racetrack.
But the PurePower filter allows racers and crew chiefs to unscrew the canister housing and remove the filter media without actually removing the entire filter assembly from the car. It can be removed, checked, cleaned, and reinstalled on the car in a matter of minutes with minimal mess. This is where we think that smart racers can take the greatest advantage of the PurePower filters.
Remember, there a many different...
Remember, there a many different ways to improve your racing operation. PurePower also makes filters for almost all diesel engines. If one of these filters can save you money on your tow rig by tripling the amount of time between oil changes, eliminating the cost of purchasing replaceable oil filters, and, according to some tests, even improving fuel mileage, that money can, in turn, be invested into your race car.
We also wanted to see how this new filter actually performed in action, so we travelled to the campus of the Universal Technical Institute in Mooresville, North Carolina—or "NASCAR Tech" as it's commonly known. There are several branches of UTI, but the Mooresville location offers a concentration of classes specifically for stock car racing. It is also constantly testing new components and different processes in order to give its students a real-world understanding for how top-level racing works. So UTI was more than happy to test the new filter on one of its dyno engines.
The engine was a previous-generation Dodge Cup engine capable of 700-plus horsepower and 8,000 rpm. We first ran a baseline with a standard oil filter with several dyno pulls, then switched out the filter for one of PurePower's units. The oil was Mobil 1 Synthetic 15-50 for all the pulls. Afterward, we put the original filter back on to make sure we could duplicate our baseline numbers.
Overall, we couldn't find much in the way of a horsepower gain. We did see a slight drop in oil pressure levels which should mean that the oil pump doesn't have to work as hard to push the oil through the filter. Still, the dry-sump engine configuration may have made testing a little more complicated. We'd like to follow up with more tests at a future date on a wet-sump engine configuration.
Overall, however, even if the PurePower filter doesn't provide a horsepower advantage, there are definitely other pluses that can benefit race teams. Granted, the filter is approximately 20 times more expensive than a standard throw-away filter but that could pay for itself in a season or two of trashed filters. Plus the extra cleaning provided by the smaller openings in the stainless screen filter not only traps particulates but also breaks any air bubbles into smaller particles, reducing aeration. And finally, the ability to quickly check your filter any time the engine seems to be a bit down on power or behaving strangely is definitely a no-brainer.