![]() It is commonly believed that this leads to better longevity at higher rpm. This means that the connecting rod see's less of an angle as the crankshaft rotates which, in theory, means less side-loading friction on the piston. This combination still works out to a 2.0L displacement, however the rod/stroke ratio goes up from 1.70 to 1.77. This configuration uses a standard stroke (88mm) crank, a rod length that is longer than stock (156mm vs 150mm), and a piston compression height that is shorter than stock to make up for the added rod length. The rod/stroke ratio is 1.7 in factory configuration which is pretty good. There are lots of pistons, rods, and crankshafts that stick to these standard dimensions and some of the fastest 4g63 cars in the world have set records using the factory dimensions. The factory 4g63 came with an 88mm stroke, and 150mm rod length, and a 34.9mm piston compression height. Some people want a bigger engine with more displacement, while others want a higher rod/stroke ratio for longevity at high rpm. So you can build them without needing custom parts.Įach one of these combinations as a different Rod Length, Stroke, and Compression Height combination that all add up to a dimension that will fit within the 4g63 block. There are more than 4 configurations however, these are the 4 that manufacturers make shelf parts for. There are 4 popular displacement configurations for the 4G63. ![]()
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