Tri-metal main bearings PSA TU3JP TU5J2/J4/JP/JP4

The tri-metal main bearing sets from ACL RACE and KING RACING for TU3JP and TU5 engines are made up of 10 bearings.

Find below (click on the image) the tri-metal big end bearings for PSA TU3JP, TU5 engines:

Technical specification

• Crankshaft main journal diameter (min/max): 49.962 / 49.981mm
• Main bearing bore diameter (min/max): 53.712 / 53.731mm
• Max thickness: 1.8540mm
• Sizes: standard or standard with HX clearance or +0.305mm or +0.50mm
• Anti-friction coating: none
• References: 5M2797, 5M2797H-STD, 5M2797HX-STD, 5M2797H-0.3, 5M2797H-0.5

Tri-metal bearings from the ACL Race Series are manufactured to tight tolerances. CNC machining is carried out to micron accuracy before a metrology check of the diameters, thickness and width of the ACL Race Series tri-metal bearing. This ensures the ACL Race Series bearings provide a reliable and consistent fit in your performance engine. ACL Race Series tri-metal bearings are actually made up of 4 layers:

• SAE1010 steel, located on the outside
• 0.3mm copper alloy
• 0.0001mm nickel
• Copper alloy from 0.013 to 0.018mm

This material strategy, combined with the manufacturing processes, makes the ACL Race Series tri-metal bearings more resistant to increases in power, torque or engine speed. The compression strength of the ACL Race Series tri-metal bearings brings reliability to your engine, even with turbo or supercharger builds under heavy boost, or high-revving engines.

Technical specification

• Crankshaft main journal diameter (min/max): 49.96 / 49.98mm
• Main bearing bore diameter (min/max): 53.71 / 53.73mm
• Max thickness: 1.852mm
• Sizes: standard or standard with HX clearance or +0.30mm or +0.50mm
• Anti-friction coating: none
• References: MB5729, MB5729XP, MB5729XP STDX, MB5729XP0.3, MB5729XP0.5

Since 1960, KING RACING has designed and manufactured high performance / high quality bearings. Beyond its ultra high performance production machinery, King Racing relies on simulation software to analyse the thermodynamics, dynamics and elasto-hydrodynamics of their bearings. KING RACING tri-metal bearings are produced in pMax Black, a tri-metal alloy 24% stronger than any existing tri-metal bearing.

KING RACING bearings are made up of 3 to 4 layers (depending on the application):

Outer: steel Intermediate: lead bronze Inner: babbitt with a high copper content Anti-friction coating containing lubricant and ceramic additives