Tri-metal main bearings RENAULT F7R F7P

The ACL RACE and KING RACING tri-metal main bearing sets for F7R and F7P engines consist of 10 bearing shells.

Below (click on the image) you will find the tri-metal big end bearings for RENAULT F4R, F7R and F7P engines, together with the plastigage strips used to check the running clearance between the bearings and the crankshaft:

Technical specification

• Crankshaft main journal diameter (min/max): 54.785 / 54.795mm
• Main bearing housing diameter (min/max): 58.731 / 58.744mm
• Maximum thickness: 1.945mm
• Size(s): standard, standard with HX clearance, +0.25 or +0.5mm
• Anti-friction coating: none
• References: 5M7807, 5M7807H-STD, 5M7807HX-STD, 5M7807H-.25, 5M7807H-.50

ACL Race Series tri-metal bearings are manufactured to exacting tolerances. CNC machining is carried out to within microns, followed by metrology inspection of the diameter, thickness and width of each ACL Race Series tri-metal bearing shell. ACL Race Series bearings therefore deliver a reliable, consistent fit in your performance engine. ACL Race Series tri-metal bearings are in fact built up from four layers:

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

This choice of materials, combined with the manufacturing processes, makes ACL Race Series tri-metal bearings more resistant to increases in power, torque and engine speed. The compressive strength of ACL Race Series tri-metal bearings brings reliability to your engine even on turbocharged or supercharged builds running high boost, or on sharp, high-revving engines.

Technical specification

• Crankshaft big end journal diameter (min/max): 54.79 / 54.80mm
• Main bearing housing diameter (min/max): 58.73 / 58.75mm
• Maximum thickness: 1.945mm
• Size(s): standard, standard with HX clearance, +0.25 or +0.50mm
• Anti-friction coating: none
• References: MB5180, MB5180XP, MB5180XP STDX, MB5180XP0.25, MB5180XP0.5

Since 1960 KING RACING has designed and manufactured high-performance, high-quality bearings. Beyond its highly capable production machinery, KING RACING relies on simulation software to analyse the thermodynamics, dynamics and elasto-hydrodynamics of its 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 built up from three to four layers (depending on the application):

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