If you’re looking to crank up the performance of your ride, you might want to check out these ACL Race Series Engine Bearings. They’re not just any bearings; they’re built with a unique blend of design, metallurgy, and engineering that really stands up to the demands of high-performance driving. I’ve had my fair share of engine builds, and I can tell you that these bearings are designed to handle higher RPMs without breaking a sweat.

One of the standout features is the high-strength overlay plate. It’s thinner than what you might find in standard bearings, which actually improves fatigue properties. This means you can push your engine harder without worrying about wear and tear. Plus, the hardened steel backs on the rod bearings provide solid support for the bearing lining, ensuring they stay put in the housing even when the engine is really revving.

Another key point is the increased crush, which enhances bearing retention. You don’t want your bearings shifting around when you’re pushing your limits, right? And they’ve done away with flash plating on the back of the bearings, allowing for better heat transfer. This little change can make a big difference in how your engine performs and how efficiently it runs.

Now, if you’re into high RPM driving, you’ll appreciate the increased eccentricity. It compensates for any bore distortion and helps in forming hydrodynamic oil films, which are crucial for keeping everything lubricated and running smoothly. The 3/4 grooved main bearings are another smart touch, optimizing the load-carrying surface area and ensuring that oil flows nicely to the conrod bearings.

Consistency is key in performance engines, and these bearings deliver tight wall tolerances that help maintain those all-important clearances. Plus, the enlarged ID chamfers on the edges accommodate the larger fillet radii found on performance crankshafts, so you won’t run into any compatibility issues.

As for specs, they come in various sizes—STD, 0.25, and .25—with standard oil clearance. They’re made from tri-metal hardened steel backs, which means they’re tough enough to handle the heat and pressure of a performance engine. The dimensions fit a range of Honda Prelude models from 1983 to 2001, specifically the B18A1/B18B1 engines with a 0.25 oversize. You’ll find the minimum standard shaft size is 1.7707 inches and the maximum is 1.7717 inches. The tunnel sizes are consistent too, at 1.8898 inches.

In short, if you’re serious about your engine performance and want bearings that can keep up with your ambitions, these ACL Race Series Engine Bearings are worth considering. They’re built for those who push their engines to the limit and demand reliability and performance in return.