Ecotec has actually been the fastest in the quarter, followed up 2nd by the old school VW guys, and 3rd was the 4g63. The problem is a RWD transmission. That is also what gets the 4g63s price up there. They do have viable RWD adapters, but the cost adds up quick. It just depends how much and how far people want to go into it. By the time you buy all the adapters, custom flywheels/converters you could have a junkyard 2j or LS engine going faster for way less.