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With our pistons and rods handled, it was time for the rest of the bottom end to be addressed. We turned to Cosworth for our engine bearings. We used std size Cosworth rod and main multi layer bearings. A multi layer bearing can have the embedabilty of a soft bearing which is good for preventing damage to the crank in case of slight contamination with the load bearing capacity of a harder bearing.
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| Cosworth rod bearings have a lot of crush clearance and thick heat treated springy shells for better spin resistance. The overlay is thinner with no flash zinc for less heat retention and lower surface friction. |
Cosworth bearings have a hardened steel backing which helps make for a more spin resistant and resilient bearing. When combined with greater crush clearance the bearings will be retained in the rod and main cap better. The bearing overlay is thinner for higher load capacity and cooler running and less friction. The main bearings have grooving over ¾ of the surface instead of the more common ½ for better oil distribution to the rods. Finally the flash zinc plating of the overlay is eliminated for improved heat transfer. Cosworth bearings can take over 1000 hp so they should hold up well in our application.
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| The Cosworth main bearings have the same features as the rod bearings and most notably have a 3/4 circle groove that feeds the rods. Typical main bearings have 1/2 grooved bearings. The 3/4 grooved mains feed the rods better. |
Next we got a set of Cosworth head gaskets with the HR water flow pattern. The Cosworth gaskets are a multi layer steel design made from three layers of die cut stainless steel. Die cutting is more precise than the common laser cutting and produces smooth edges. The layers are coated with a 0.25 micron thick layer of nitrile rubber to help with sealing. Most importantly the Cosworth gasket has a folded stopper layer around the cylinder bores for vastly improved sealing and blow out resistance. The Coswoth gasket has much more blow out resistance than the stock Nissan gasket. We got the 0.6mm thickness which is very slightly thinner than the design thickness of our pistons but we figure that this will not be a problem at all.
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| The Cosworth oil pan baffle has these rubber one way trap doors that keep oil around the pickup during cornering. |
Finally we got Cosworth’s oil control baffle. The baffle will reduce the amount of oil sloshing away from the pickup under hard cornering forces. The baffle is made from stainless steel and has rubber trap doors to keep the oil from escaping around the pickup. This should help greatly as drift cars can pull pretty high G’s while being driven.
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| The oil can flow this way through the baffle but not backwards. |
