Stroker Performance Review

A junk converter on a high powered turbo car can kill mph out the back like you let off the gas at half track. When the engine makes more power it’s easier to drive through the converter. Lots of fast cars (3.70s in the 1/8th fast) are using lock up style converters now and locking them up after the high gear shift. Not really applicable to the OP but hopefully it helps to understand how a converter can effect mph.