ACL Bearings
ACL Race Series LS Main Bearings with Calico Coating
Engines: LS1, LS2, L98, L76, L77, LS3
Pickup in East Rockingham
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Overview
ACL Race Series Performance Engine Bearings and Calico Coatings have joined forces to deliver the ultimate in engine bearing technology. These coated bearings combine ACL's tough Race Series lining and overlay metallurgy with Calico's renowned CT-1 Dry Film Lubricant coating.
CT-1 is a Dry Film Lubricant coating engineered to reduce friction and abrasive wear. It provides intermittent dry lubrication unaffected by dust or dirt, and is specifically designed to withstand the extreme conditions of today's high-performance engines. Professional engine builders enjoy a higher level of confidence with increased embedability, strength, and durability.
ACL engine bearings have been coated by Calico for individuals for over 15 years, with proven compatibility and an established track record of excellence in the most exacting and extreme performance applications.
Key Advantages
Embedability
Excellent embedability characteristics allow debris contaminants to embed in the bearing, avoiding damage to the crank.
Extreme Oil Temps
CT-1 coated bearings have shown a reduction in oil temperatures as much as 8°C–11°C (15°F–20°F), also aiding in preventing viscosity loss due to extreme heat.
Oil Starvation Protection
The dry film lubricant protects against intermediate oil starvation during cold starts and rough terrain conditions where the oil film may be momentarily lost.
Bearing Construction
| Layer | Material | Thickness | Function |
|---|---|---|---|
| Coating | Calico CT-1 Dry Film Lubricant | 0.006–0.0075mm (0.00025"–0.0003") | Scuff resistant – low friction surface interaction |
| Overlay | Lead – Tin – Copper | 0.013*–0.018mm (0.0005"–0.0007") | Seizure resistant – low friction & deformable |
| Barrier | Nickel | 0.001mm (0.00004") | Separation layer |
| Lining | Copper – Lead – Tin | 0.3mm (0.012") | Fatigue strength – strong yet deformable |
| Steel | SAE1010 (High Tensile) | Remainder | High strength – supports bearing lining |
*Connecting rod bearings only - reduced for increased fatigue resistance.
Coating Process
CT-1 Dry Film Lubricant coating is applied as a spray process. Different surface preparation methods appropriate for the substrates are used prior to the coating process. Coating thickness is varied to suit the application. Typical coating thickness for engine bearings is 0.00025" to 0.00030" (6 to 7.5 microns).
Compatible engines
Fitment
Confirm fitment before ordering. Contact us if you need help matching parts to your build.