![]() ![]() According to Christian von Koenigsegg himself, the cover is similar but they’ve made modifications, like modifying the seal area, to suit the needs of their upgraded engine. ![]() I asked Koenigsegg about the rear main seal cover which originally brought my attention to the similarities that still remain. For example, when NASCAR teams receive raw casting from their respective OEMs, they then machine and modify them to meet their performance goals. This process is similar to what some race teams do when using OEM engines. Koenigsegg takes the raw castings from Grainer & Worrall and bores them, installs cylinder liners, and hones them in house. The engineering firm has extensive experience in everything from F1 engine castings to CGI blocks like Ford's EcoBoost V-6. They added things like stiffening ribs and chose Grainer & Worrall in the United Kingdom to make the new block out of aluminum. Koenigsegg ended up making so many changes to the block over time that they had to abandon Ford's and start casting their own. The main features that really remained from the Ford engine were the 90-degree angle and the bore spacing. The lubrication system was converted to dry sump and the pistons got a new oil cooling system. Koenigsegg started by reinforcing the block and implementing a new crankcase gas recirculation system, followed by all new pistons, connecting rods, and camshafts. The first redesign resulted in something that was almost entirely new. Tuning it for high power turned it into an unreliable and dirty engine that had to run on race gas, so they went back to the drawing board. Improving the performance of the Modular motor proved to be tricky. ![]()
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