The ACL Race Series 6B2433HX-STD connecting rod bushes are designed for Porsche 911 GT3 4.0 and 4.2 engines. This HX version in STD sizes allows for the use of standard-sized crankpins while providing greater oil clearance than the H-STD version.
Developed for high-performance engines and racing, the ACL Race Series features a trimetal design suited to the high mechanical stresses encountered in the lower engine. Their geometry and thickness are precisely defined to allow the engine builder to select the operating clearance best suited to their assembly.
HX STD Version to Increase Oil Clearance
Part number 6B2433HX-STD does not correspond to a repair dimension. The crankshaft retains its standard sizes, while the specific thickness of the HX bearings provides additional oil clearance compared to the 6B2433H-STD bearings.
This configuration is intended for tuners and engine builders who wish to precisely adjust the clearance at the connecting rods without using a different crankshaft dimension. The choice of an HX version must be made after measuring the crankpins and checking the oil clearance.
ACL Race Series for Porsche GT3 Engines
Connecting rod bushes serve as the interface between the connecting rods and the crankshaft journals. In a Porsche GT3 engine subjected to high RPMs and loads, maintaining the specified oil clearance during assembly is essential for proper bearing operation and to preserve the lubricant film.
The ACL Race Series 6B2433HX-STD thus provides an alternative to the H-STD version when engine tuning requires more clearance while maintaining a crankshaft with standard dimensions.
Technical Specifications of the ACL Race Series 6B2433HX-STD Main Bearings
Brand: ACL
Range: Race Series
Manufacturer Part Number: 6B2433HX-STD
Type: Connecting rod bush
Version: HX STD
Design: Tri-metal
Application: Porsche GT3
Engine displacements: 4.0 and 4.2
Engine configuration: 6-cylinder
Crankshaft dimension: standard
HX Feature: greater oil clearance than the H-STD version
Selection: based on crankshaft measurements and required oil clearance
