King Bearings created performance rod, main, and cam bearings to ensure the engine's bottom end can handle the extra stress. To learn more about King’s line of engine bearings, check out its website, or one of the previous articles we’ve written.Engine builders are scrambling to squeeze more power out of GM's LS series engines.

But, if you have something happen where the oiling system hiccups or the clearances aren’t exactly right, the coating is a layer that adds non-metallic lubricity to the bearing.” “If everything is working well - the oiling system is good, the oil is good, and the clearances are good - the coating doesn’t really help you. Moving on to the available pMaxKote bearing coating, Sledge explains that it’s only available on the XP-series bearings, and is designed to increase lubricity in the case of inadequate oil lubrication. So, if you’re building a street/strip car, I would suggest a bi-metal bearing, and if you are building an all-out race engine where you are going to be tearing it down quite often, the tri-metal bearing,” Sledge adds. It’s more aimed at engines that are frequently torn down. The pMaxBlack isn’t a good street bearing, since it doesn’t absorb debris much. “The tri-metal bearing doesn’t absorb that well, since it’s an all-out race bearing. On the right are the XP-series pMaxBlack bearings designed for race engines. On the left is the bi-metal HP-series bearings, which are designed for street applications. Over the long haul, it will absorb some of the debris that gets into the motor and bearings, making it ideal for street use where you aren’t taking the engine apart and inspecting it often, if at all,” says Sledge. “The bi-metal bearing has good embeddability and conformability. “We get a lot of calls about which bearing to use, and when to use a black bearing versus a white bearing.”Ĭosmetics aside, the two bearing lines are designed for two different applications. He also explains that since the XP bearings are black (whether coated or not) and the HPs are bare silver, they are referred to as “black” bearings and “white” bearings. “The primary differences are that the HP is a bi-metal bearing and the XP is a tri-metal design,” Sledge explains. However, when we spoke to King’s Ron Sledge at SEMA, he mentioned that with all the talk about the XP series, the company’s HP-series bearings are being overlooked for their proper application due to some confusion on the differences between the two bearing types. Over the past few years, we’ve talked a lot about King Engine Bearings’ latest and greatest XP-series of pMaxBlack and pMaxKote engine bearings.

King ls1 cam bearings